Location: Remote
Workplace: remote
ABOUT YOU
Xsolla is seeking a Principal Engineer with deep expertise in Identity and Golang backend development to lead the evolution of our authentication and authorization stack — enabling developers and players to connect safely and effortlessly across the Xsolla ecosystem.
ABOUT US
Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game.
For more information, visit xsolla.com.
Responsibilities:
Architect and lead the design of Xsolla’s next-generation identity platform, supporting authentication, authorization, single sign-on (SSO), and account federation across internal and external services.
Develop high-performance Golang microservices that manage user identity, access tokens, and permission enforcement at global scale.
Collaborate closely with security, DevOps, and platform engineering teams to embed Zero Trust principles and standardize access governance across services.
Integrate modern IAM standards and protocols (OAuth2, OIDC, SCIM) to enhance developer experience and partner integrations.
Mentor and coach engineering teams on secure service design, identity best practices, and cross-service communication patterns.
Partner with product teams to ensure that identity-related features — such as player login, entitlement management, and account linking — are scalable, compliant, and user-friendly.
Define and enforce API and data security standards, supporting compliance initiatives.
Evaluate and integrate third-party identity frameworks or open-source solutions (e.g., Keycloak, Auth0, Ory, ForgeRock) as part of Xsolla’s hybrid identity strategy.
Qualifications & Skills:
10+ years in backend or systems engineering, including 5+ years designing and implementing authentication and authorization services.
Expert-level skills in Golang, with experience building and scaling distributed, event-driven microservices.
Proven track record with identity federation, token management, and access control systems.
In-depth understanding of authentication and authorization standards (OAuth 2.0, OIDC, JWT, SCIM).
Solid grasp of security principles, encryption, key management, and secrets management systems (e.g., HashiCorp Vault, AWS KMS).
Experience building high-availability systems in Kubernetes-based environments using AWS, or GCP.
Strong architectural vision with the ability to influence cross-team design and technology direction.
Excellent communication and collaboration skills across distributed teams.
Nice to Have:
Experience building or contributing to identity systems for gaming or SaaS ecosystems.
Familiarity with multi-tenant architectures, ReBAC/ABAC models, and policy-as-code (OPA, AuthZ frameworks).
Background in security engineering, DevSecOps, or compliance automation.
Contributions to open-source Golang.
Benefits:
We are passionate about fostering a supportive environment for our team, so we prioritize the physical, mental, and emotional well-being of our employees and their families through a comprehensive Benefits Program. This includes 100% company-paid medical, dental, and vision plans, unlimited Flexible Time Off, and a personalized career roadmap for each employee. By investing in professional development through training and educational opportunities, we ensure that our team thrives both personally and professionally. Together, we’re not just building a business; we’re cultivating a community that values creativity, collaboration, and the transformative power of play.
Equal Employment Opportunity Statement:
Xsolla is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate based on race, color, religion, sex, national origin, age, disability, sexual orientation, gender identity, or any other characteristic protected by law.
We consider qualified applicants with criminal histories in accordance with the Fair Chance Act.
Criminal History Consideration:
For the Principal Engineer, we will conduct a background check that may include the following:
Criminal history check
Employment verification
Education verification
Relevance to Job Responsibilities:
The background check is relevant to this position because of the following role responsibilities:
Accessing confidential company data
Ensuring compliance with regulatory requirements
Handling sensitive financial information/managing budgets/accessing funds
Rights Under the Fair Chance Act:
Applicants are encouraged to inquire about their rights under the Fair Chance Act. If you have questions regarding our hiring practices, please contact careers@xsolla.com.
The listed range is specific to Los Angeles, CA, and varies based on factors such as location and experience.
Location: Tallinn, Estonia; Helsinki, Finland; Abu Dhabi, United Arab Emirates; Dubai, United Arab Emirates; Sharjah, United Arab Emirates
Workplace: on-site
At
TechBiz Global
, we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a
Senior Protocol Engineer
to join one of
our clients' teams
. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you.
You’ll be leading the design and development of next-generation consensus models, building secure and scalable EVM systems, and mentoring a world-class engineering team.
What You’ll Do
Lead the development of
EVM-based systems
and blockchain infrastructure.
Design and implement
Proof of Stake and other consensus models
.
Build and optimize
smart contract platforms and tooling
.
Collaborate with leadership to define technical strategy and roadmap.
Mentor engineers, fostering a culture of innovation and excellence.
Drive decentralization and scalability improvements.
10+ years
of experience in blockchain protocols, distributed systems, or AI infrastructure.
7 to 8
years hands-on expertise with
consensus algorithms and cryptography
.
Proven track record in
blockchain protocol design
.
Strong background in
software engineering
(Rust, Go, Solidity, JavaScript, Ruby, etc.).
10 years
of experience in leading
technical teams in blockchain/crypto companies
.
Contributions to
open-source blockchain projects
.
A reputation as an
innovator in blockchain/crypto
.
Nice-to-Have
Experience in
multi-coin pools
or algorithmic optimization.
Familiarity with
NEAR, Blackcoin, Ethereum, BitHalo, or similar ecosystems
.
Why Join Us?
This is a chance to work with a passionate team, shape the future of decentralized technologies, and build solutions that will define the next era of blockchain.
ОфисseniorTallinn, Estonia; Helsinki, Finland; Abu Dhabi, United Arab Emirates; Dubai, United Arab Emirates; Sharjah, United Arab Emirates
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Location: Vilnius
500M+ downloads. 80M+ monthly users. A decade of building – and we’re still accelerating.
Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down.
With 7M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better.
The job
Build systems that power the #1 Health App for Women
We’re not a startup guessing what might work anymore, we’re operating at serious scale. Flo is used by 1 in 4 women aged 18–44 in the US. And we just hit our biggest month ever with 8.6M installs and a 2.8M MAU jump. The engineering behind that? Complex, distributed, secure and yours to help shape.
At Flo, backend engineering is core product work.
We build:
Data-driven health insights that genuinely change lives
Distributed systems that stay fast, available and scalable under massive real-time demand
Privacy-first features like Anonymous Mode - recognised in TIME’s Best Inventions
Tooling and platforms that help Flo’s teams move faster, with fewer bottlenecks
We’re tech-agnostic when hiring for backend. If you’ve built and run distributed systems and want to work in Scala (or already do), great. We’ll support your ramp-up. What matters most: you can solve problems, own outcomes, and keep learning.
Your Experience
You’ll thrive here if you:
Have 7+ years’ experience building distributed backend systems
Know what it takes to make systems fast, reliable and secure and when to prioritise each
Are fluent in Java, Scala, Python or similar (and curious enough to learn Scala with us)
Get DevOps, databases (SQL and NoSQL) and love designing APIs that just work
Have a strong handle on writing clean, documented, version-controlled code
Take ownership, show initiative and don’t wait to be told
Are product-minded and always thinking about the end-user impact
Bonus if you’ve worked with:
Stream processing
Public cloud infrastructure (AWS, GCP etc.)
What’s in it for you?
You’ll join a senior engineering team that moves fast, thinks big and builds tech used by millions daily. You’ll work on meaningful problems with real impact - in health, privacy and scale. This isn’t just code for the sake of code. This is building the future of personalised health.
#LI-Hybrid #LI-LM12
Salary Range - gross per month (ranges may vary based on skills and experience)
€6.500
—
€10.000 EUR
How we work
We’re a mission-led, product-driven team. We move fast, stay focused and take ownership – from brief to build to impact. Debate is encouraged. Decisions are shared. We care about craft, ship with purpose, and always raise the bar.
You’ll be working with people who take their work seriously, not themselves. It takes commitment, resilience, and the drive to keep going when things get tough. Because better health outcomes are worth it.
What you'll get
We support impact with meaningful reward. Here’s what that looks like:
Competitive salary and annual reviews
Opportunity to participate in Flo’s performance incentive scheme
Paid holiday, sick leave, and female health leave
Enhanced parental leave and pay for maternity, paternity, same-sex and adoptive parents
Accelerated professional growth through world-changing work and learning support
In-person collaboration and work in a hybrid model, with 3 days per week spent in the office
5-week fully paid sabbatical at 5-year Floversary
Flo Premium for friends & family, plus more health, pension and wellbeing perks
Diversity, equity and inclusion
Our strength is in our differences. At Flo, hiring is based on merit, skill and what you bring to the role – nothing else. We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities. Read our
privacy notice for job applicants
.
Location: Metn, Lebanon
Staff Backend Engineer - L6
The Company
Toters is an on-demand e-commerce and delivery platform that enables customers to get anything in their city with the highest level of convenience.
At Toters, technology drives everything we do. Our product teams build features that simplify customers' lives, while our engineers create scalable solutions and optimize internal processes to deliver faster and more cost-effectively. If you thrive in a high-growth startup environment and want to help reshape how people shop across the Middle East, join us.
Description
As a Staff Backend Engineer, you will be responsible for shaping and delivering large-scale, cross-team systems and initiatives that significantly impact product reliability, performance, developer productivity, and business outcomes. You will mentor and grow multiple engineers, drive technical strategy within and across teams, resolve organization-level ambiguity, and proactively raise the bar for engineering excellence.
You combine deep hands-on expertise with strong strategic thinking, owning complex domains end-to-end while influencing roadmaps, architecture standards, and team processes at a broader scale.
Key Responsibilities
Lead the design, architecture, and delivery of large, cross-system features, platforms, or infrastructure components that span multiple teams and quarters-long timelines.
Drive technical and architectural decisions for entire domains or product areas, defining long-term strategy, surfacing major trade-offs, and aligning stakeholders across engineering, product, and operations.
Own end-to-end system health: Establish observability, reliability practices, performance baselines, and incident response patterns that prevent recurring issues across services.
Mentor and coach engineers, provide career guidance, technical pairing, code/design reviews.
Identify and eliminate systemic bottlenecks in development velocity, testing, deployment, or onboarding; build shared tools, frameworks, patterns, or automation adopted team-wide or org-wide.
Champion and evolve engineering standards, best practices, and conventions; influence adoption across multiple teams through clear reasoning, documentation, and leading by example.
Increase engineering leverage by enabling other teams to move faster and more safely through better architecture, shared abstractions, technical guidance, and reusable patterns."
Collaborate deeply with product, design, legal, and operations to challenge requirements, refine scopes, assess technical feasibility/risk, and ensure compliance (e.g., privacy, KYC).
Lead architecture and design discussions at the team-of-teams level; write detailed specs, RFCs, and decision records that enable async alignment and reduce future rework.
Act as a technical escalation point during major incidents, guiding resolution across domains and preventing recurrence through post-mortems and systemic fixes.
Key Qualifications
Bachelor's degree in Computer Science or equivalent practical experience.
8+ years of hands-on software engineering experience, in backend systems at scale (preferably including PHP/Laravel in high-traffic environments).
Expert-level proficiency in backend development, OOP/SOLID/design patterns, microservices, event-driven architecture, and distributed systems principles.
Proven track record designing and owning large-scale, performant, reliable backend systems (data modeling, complex schemas, PostgreSQL/MySQL optimization, Redis caching/queuing at scale).
Deep experience with cloud infrastructure (AWS preferred), containerization, serverless, CI/CD pipelines, observability (monitoring, alerting, tracing), and incident management.
Strong leadership & influence skills: mentoring multiple engineers, driving cross-team initiatives, resolving ambiguity at org level, and building consensus through clear communication.
Excellent written & verbal English; ability to write precise technical documents, RFCs, and give constructive feedback across seniority levels.
Demonstrated impact on business/product metrics through technical leadership (e.g., reduced latency, improved uptime, accelerated delivery velocity).
Nice to Have
Experience leading migrations, platform builds, or reliability programs in high-traffic e-commerce/delivery marketplaces.
Familiarity with advanced scaling techniques (sharding, eventual consistency, CQRS, etc.).
Prior work ensuring regulatory compliance (KYC, privacy, data protection) in collaboration with non-technical teams.
Benefits
Competitive compensation.
Discounts on Toters orders.
First-class medical insurance.
Location: United States, Remote
Are you on a mission to create games that bond players together into deeply invested communities? Would you like to work on something comedic with lighthearted and whimsical characters? Do you enjoy the challenge of solving complex, non-deterministic problems with simple, pragmatic solutions?
As a
Staff Services Engineer
for teamLFG, you will design and build the core services that take our game from prototype to production, from gathering requirements to implementation and scaling. Most importantly, you will work with a fun, dedicated, and passionate cross-discipline team devoted to turning a creative dream into a new franchise at PlayStation.
We look for candidates who value joining a mission-focused team with a diverse set of backgrounds, experiences, interests, and viewpoints.
RESPONSIBILITIES
Build and maintain production-quality backend game services
Collaborate daily with a cross-disciplinary team to design the core services for the game (including sessions, matchmaking, and player progression)
Effectively write clear, concise, and accurate technical documentation and email communication, with the ability to summarize complex topics and achieve alignment across multiple teams
Calmly deal with production incidents, participating in an on-call rotation after launch
REQUIRED SKILLS
Production experience designing and building backend game services
Ability to communicate with customers of different technical and non-technical backgrounds to help them navigate technology and achieve their goals
Ability to diagnose complex system failures using logging and metrics
Ability to write, debug, and maintain code in Rust
Embrace a “we” culture in addition to being an outstanding collaborator and communicator
NICE-TO-HAVE SKILLS
Experience with “games as a service” online game development
Experience leading (direct management, mentoring, or guiding) engineers
Ability to write, debug, and maintain code in C++
Working knowledge of Docker, Git, and Linux (including shell scripting and system configuration)
At SIE, we consider several factors when setting each role’s base pay range, including the competitive benchmarking data for the market and geographic location.
Please note that the base pay range may vary in line with our hybrid working policy and individual base pay will be determined based on job-related factors which may include knowledge, skills, experience, and location.
In addition, this role is eligible for SIE’s top-tier benefits package that includes medical, dental, vision, matching 401(k), paid time off, wellness program and coveted employee discounts for Sony products. This role also may be eligible for a bonus package. Click
here
to learn more.
This is a flexible role that can be remote, with varying pay ranges based on geographic location. For example, if you are based out of Seattle, the estimated base pay range for this role is listed below.
$190,000
—
$285,000 USD
Please note, Sony Interactive Entertainment conducts background checks at the offer stage for all new employees (which may include criminal background checks for some roles) and will need to process personal information to support these checks.
Please refer to our
Candidate Privacy Notice
for more information about what personal information we collect, how we use it, who we share it with, and your data protection rights.
Location: Global
Workplace: Remote
Tempo is a layer-1 blockchain purpose-built for stablecoins and real-world payments, born from Stripe’s experience in global payments and Paradigm’s expertise in crypto tech.
Tempo’s payment-first design provides a scalable, low-cost predictable backbone that meets the needs of high-volume payment use cases. Our goal is to move money reliably, cheaply, and at scale. Our north star is simplicity for users: fintechs, traditional banks, merchants, platforms, and anyone else looking to move their payments into the 21st century.
We're building Tempo with design partners who are global leaders in AI, e-commerce, and financial services: Anthropic, Coupang, Deutsche Bank, DoorDash, Mercury, Nubank, OpenAI, Revolut, Shopify, Standard Chartered, Visa, and more.
We’re a team of crypto-optimists, building the infrastructure needed to bring real, substantial economic flows onchain. We like to move fast and swing for the fences — join us!
Responsibilities
- Design, develop and ship complex features, indexing on performance and benchmarking
- Own development throughout the entire lifecycle, with a focus on deep collaboration, quick iteration cycles and incorporating stakeholder feedback
Qualifications
- Significant experience building scalable, distributed systems in Rust
- Deep familiarity with the Ethereum ecosystem, particularly the EVM and Execution Layer, as well as reth and consensus mechanisms; hands-on experience working across the entire Ethereum stack is ideal
- Self-motivated and independent, and excited by ambiguity and opportunities to develop concrete solutions to nebulous problems
- Collaborative and an exceptional communicator
Attributes
- High motor
- Razor-sharp thinker with precise command of language
- Concise, evidence-based communicator
- Excellent organizational and logistical skills
- Intense curiosity and open-mindedness
- Scrappiness; willingness to roll up sleeves
- Growth mindset
Location: São Paulo, Brazil; Buenos Aires, Argentina; Montevideo, Uruguay; Lima, Peru; Santiago, Chile; Asunción, Paraguay
Workplace: remote
At
TechBiz Global
, we are providing recruitment service to our TOP clients from our portfolio. We are currently looking for a skilled
Java Backend Engineer
to join one of
our clients' teams
. You will play a key role in building an Applicant Tracking System (ATS) integrated with REST APIs and FIX APIs. You will work closely with product managers, architects, and front-end engineers to design, develop, and optimize scalable backend services for high-performance applications.
Key Responsibilities
* Design and implement backend services and APIs in Java (Spring Boot / Jakarta EE) for ATS functionality.
* Develop and maintain RESTful APIs for integrations with external systems and internal services.
* Implement and optimize FIX protocol-based APIs for financial/trading system integrations.
* Ensure low-latency, high-availability, and secure backend architecture.
* Write clean, maintainable, and well-documented code following industry best practices.
* Collaborate with DevOps to deploy and monitor services in production environments (AWS, GCP, Azure, or on-prem).
* Optimize database performance (SQL/NoSQL) and design schemas for ATS workflows.
* Conduct code reviews, unit testing, and integration testing to maintain code quality.
* Troubleshoot and resolve performance, scalability, and reliability issues.
* Stay updated on emerging technologies, protocols, and best practices in API development and backend engineering.
Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
3–5 years of professional experience** in backend development with Java.
Strong expertise in Spring Boot, Hibernate/JPA, and RESTful APIs.
Hands-on experience with FIX protocol (QuickFIX/J or similar libraries).
Solid knowledge of multithreading, concurrency, and low-latency system design.
Experience with databases (PostgreSQL, MySQL, MongoDB, Redis, etc.).
Proficiency in Git, CI/CD pipelines, Docker, Kubernetes.
Strong understanding of security principles (OAuth2, JWT, SSL, encryption).
Excellent problem-solving, debugging, and analytical skills.
Nice to Have
Experience with financial systems, trading platforms, or ATS solutions.
Knowledge of messaging systems (Kafka, RabbitMQ, Redpanda, Chronicle Queue, etc.).
Exposure to cloud services (AWS/GCP/Azure).
Familiarity with microservices architecture and event-driven systems.
УдалённоSão Paulo, Brazil; Buenos Aires, Argentina; Montevideo, Uruguay; Lima, Peru; Santiago, Chile; Asunción, Paraguay
Location: Remote - European Region
Workplace: hybrid
Coinspaid Dev is the engineering brand behind the technology, infrastructure, and R&D expertise built within Coinspaid. With more than 120 engineersand over 11 years of industry experience, Coinspaid Dev brings together software engineering, infrastructure, security and R&D teams with experience building distributed systems and blockchain infrastructure operating across more than 20 blockchain networks.
Coinspaid Dev emerges as an independent engineering brand with a straightforward mission: to advance blockchain infrastructure engineering and contribute practical expertise back to the industry. The structure is new. The experience behind it is not.
Responsibilities:
Collaborate with cross-functional and cross-domain teams to gather requirements, design solutions, and deliver features
Design, develop, and maintain backend systems using PHP and MySQL(or similar), ensuring they are scalable and maintainable
Implement and optimize complex features with a focus on clean, reusable, and efficient code
Write unit tests to ensure the reliability and scalability of code
Participate in code reviews, architecture discussions, and ensure adherence to best practices in software development
Monitor and troubleshoot production systems, ensuring the highest levels of availability, performance, and security
Share on-call duties with the team to ensure smooth operations of the systems in production
Stay updated with new technologies and trends, and introduce them where appropriate to enhance system performance and maintainability
Requirements:
Experience (5+ years) in object-oriented PHP and modern PHP tools and practices: SOLID, KISS, etc.
Good knowledge of the latest versions of Laravel framework
Strong understanding of relational databases like MySQL/PostgreSQL including transaction management
Experience in database query optimization, analysing deadlocks and db performance
Experience in designing, implementing, and maintaining message-driven services using Apache Kafka (or other message broker)
Experience with monitoring tools (Prometheus, Grafana or similar)
Experience with security best practices
Working with Docker/Docker Compose on a daily basis
You understand Agile values and principles
Good level of spoken and written English (B1+) and Russian
Nice to have:
Understanding crypto industry
Experience with Go
Why join CryptoProcessing by Coinspaid
You’ll be joining a company that is actively shaping its space – with enough scale to matter and enough room to make an impact.
At Coinspaid, people are expected to think, contribute, and take ownership – and are supported in doing so.
We focus on flexibility, wellbeing, and long-term growth – without overcomplicating how benefits work.
Flexible Benefits
Benefit Bar – up to €230/monthA flexible monthly budget you can use for what matters most to you – from sports and mental health to coworking, home office, or medical-related expenses.
Work & Flexibility
Fully remote work from almost anywhere
Optional offices and relocation support
Flexible, async-friendly environment
Growth & Learning
Budget for courses, certifications, and professional development
Language learning support
Cross-team learning and knowledge sharing
Wellbeing & Support
Medical insurance or reimbursement depending on location
Access to mental health support
Financial support for important life events
Extras
Merch shop with rewards system
Team offsites and company events
Sounds good? Well then, we can’t wait to see your resume!
To learn more please visit: https://coinspaid.com/about-us/ & https://coinspaid.com/careers/
Location: Baku; Serbia; Canada
Workplace: onsite
ABOUT YOU
We’re looking for a Senior Backend Software Engineer who thrives on solving complex technical challenges and building distributed systems that scale. You’re someone who’s comfortable working with Go, embraces microservices architecture, and understands how to build robust, event-driven systems used by millions of users.
You have experience working in containerized environments, designing resilient services, and contributing to system design and infrastructure decisions. You take ownership of your code from design to deployment, and enjoy collaborating with cross-functional teams to deliver high-impact, production-ready solutions.
If you’re passionate about building backend systems that are scalable, observable, and fault-tolerant, and you’re excited by the idea of powering innovative products at the intersection of games, commerce, and data, we’d love to hear from you.
ABOUT US
Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game.
For more information, visit xsolla.com.
Responsibilities
Design, build, and maintain backend services that power core products and platforms.
Develop event-driven systems using Go, Kafka, and Temporal (or similar orchestration tools).
Build scalable microservices in containerized environments using Docker and Kubernetes.
Drive architecture decisions that improve performance, resiliency, and maintainability.
Collaborate with engineers, product managers, designers, and QA to deliver end-to-end solutions.
Own your code in production, monitor, debug, and continuously improve service performance and reliability.
Write automated tests and follow CI/CD best practices to ensure high-quality deployments.
Participate in code reviews, technical discussions, and knowledge sharing across teams.
Qualifications & Skills
5+ years of backend development experience in Go or a similar language.
2+ years of hands-on experience with Kafka or equivalent streaming platforms.
Strong understanding of microservices architecture, distributed systems, and event-based communication.
Experience working with workflow orchestration tools such as Temporal, Cadence, or similar.
Familiarity with cloud infrastructure and container orchestration (e.g., Kubernetes, Docker).
Solid understanding of observability, monitoring, and performance optimization.
Ability to troubleshoot production issues, analyze system behavior, and drive resolution.
Nice to Have
Experience with cloud platforms (e.g., AWS, GCP, or Azure).
Familiarity with ClickHouse, Postgres, or other analytical/OLAP/OLTP databases.
Background in gaming, payments, or commerce systems.
Prior experience working on internal platforms or developer-facing tools.
The duties and responsibilities of this position may evolve over time to support the organization’s goals and individual growth. This job description is intended to outline the general nature and level of work being performed and is not intended to be an exhaustive list of all duties, responsibilities, and qualifications required. By submitting your application, you consent to Xsolla conducting background checks, where permitted by law, after the final interview stage. All checks will comply with local regulations, and your information will be handled confidentially. Xsolla takes your privacy seriously and will not sell or externally distribute any personal data received during the hiring process. In accordance with applicable data protection laws, Xsolla is committed to protecting your personal information and respecting your privacy.
For any inquiries related to data privacy, please contact: careers@xsolla.com
Explore more opportunities at: https://xsolla.com/careers
Location: Singapore, Singapore
OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa
About OKX
At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.
About the Opportunity
Join our Retail Trading team and you will be working alongside a high-performing team to deliver comprehensive and timely market information to millions of retail users. You will leverage your expertise to design and build easy-to-use applications with distinguishable precision, speed, and insights. In this role, you’ll also contribute to the evolution of our architectural foundations, ensuring that our solutions remain reliable, scalable, and adaptable in a rapidly evolving market.
What You’ll Be Doing
Design, develop, and maintain high-quality backend systems for market analysis in a fast-paced, dynamic environment.
Collaborate closely with product managers, frontend engineers, and infrastructure teams to deliver scalable and efficient solutions.
Continuously improve system reliability, scalability, and maintainability through thoughtful design and engineering best practices.
Actively participate in code reviews, architecture design discussions, and technical planning sessions.
Contribute to team culture by sharing knowledge, writing documentation, and mentoring other engineers.
What We Look For In You
10+ years of backend development experience in internet-scale environments, with strong system design and engineering capabilities.
Proficient in Java, with solid computer science fundamentals and a commitment to clean, maintainable code with strong attention to code quality, with an emphasis on readability, scalability, and maintainability.
Experience designing and leading the development of complex, consumer-facing systems.
Background in building internet-scale growth or operations platforms (e.g., content operations, user engagement, or growth automation systems).
Familiar with mainstream middleware and infrastructure components such as MySQL, Kafka, Elasticsearch, and Redis.
Experienced in microservices architecture design and knowledgeable about service governance frameworks (e.g., Nacos, Sentinel, Gateway) and containerization technologies (e.g., Docker, Kubernetes).
Strong understanding of multithreading, network models, and JVM memory architecture.
Nice to Haves
Product-minded, with the ability to assess value and prioritize from a user's perspective.
Highly self-motivated, curious, and growth-oriented.
Strong alignment with company values and a willingness to lead by example.
A genuine interest in the cryptocurrency industry and belief in its long-term potential.
Perks & Benefits
Competitive total compensation package
L&D programs and Education subsidy for employees' growth and development
Various team building programs and company events
Wellness and meal allowances
Comprehensive healthcare schemes for employees and dependants
More that we love to tell you along the process!
#LI-ML1 #LI-ONSITE
Notice:
All official
OKX
vacancies are published on this website.
While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated.
If in doubt, please apply directly through our official careers website.
Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to
OKX
's
Candidate Privacy Notice
.
Location: Belgrade; London; Berlin
We are seeking an experienced Backend Software Engineer to join our Crawler team. In this role, you will design, develop, and operate systems that ingest, process, and manage web-scale data in support of our next generation of advanced search technologies. This is a critical, high-impact engineering position, requiring expertise across both backend and frontend components of our data acquisition stack.
Responsibilities
- Take ownership of and lead projects focused on developing large-scale web crawlers, ingestion pipelines, and data processing systems.
- Build, maintain, and optimize core backend and frontend components for crawler services, including storage, retrieval, and UI dashboards for data management.
- Collaborate closely with Search and Infrastructure teams to ensure the reliable, high-quality ingestion and processing of billions of web pages.
- Architect and implement fullstack features and scalable distributed systems that handle high-load and real-time data operations.
- Rapidly iterate, experiment with novel approaches, and continuously enhance system performance, usability, and reliability.
Qualifications
- Minimum of 5 years of software development experience, with strong knowledge of data structures and algorithms in at least one of the following languages: Python, C++, Rust, or Go.
- Experience with large-scale web crawlers is highly desirable.
- Proven experience building, deploying, and optimizing high-load, distributed, and hardware-adjacent services.
- Deep understanding of cloud infrastructure, with hands-on experience in Kubernetes (K8s) and AWS.
- Demonstrated passion for writing clean, efficient, and scalable systems.
Location: Warsaw, Poland
Are you looking for the next professional opportunity, that will challenge you and advance your career?
Join our team now!
Tickmill is looking to hire a
Backend Developer (.NET)
to join our rapidly expanding team.
Join a high-caliber team and contribute to its success with your passion, hard-work and positive attitude.
About Tickmill.
Tickmill is an award-winning, multi-regulated broker offering access to a broad range of asset classes, including CFDs on Forex, Stocks, Indices, Commodities, Cryptocurrencies, and Bonds, as well as Exchange Traded Derivatives like Futures & Options).
Founded in 2014, the Tickmill Group employs over 330 professionals across offices in London, Cyprus, Poland, Estonia, Seychelles and several other locations worldwide.
Our culture is built on trust, transparency, and high standards. We bring together ambitious professionals who are looking for an environment that supports them to dominate in their fields.
Our diverse, multilingual teams are focused on innovation, delivering bold excellence, and raising the bar wherever we can.
We offer competitive benefits packages, frequent team initiatives, and opportunities for professional growth.
Join the Tigers!
What does the role look like?
The
Backend Developer (.NET)
will have the opportunity to:
Design, develop and support backend services with a focus on integrations with other systems, services.
Support and improve our quality processes by developing automated unit tests and performing code reviews.
Collaborate with internal/external teams throughout the integration process.
Identify, correct bottlenecks and fix bugs.
Help maintain code quality, organization, and automatization.
Stay up to date with new technology trends, applications, and protocols.
What do you need to succeed in this role?
Degree in Computer Science, Engineering, or a related field.
Good understanding of object-oriented programming and design patterns.
3+ years of software development experience, ideally in C#.
Ability to assess, troubleshoot and debug integration issues.
Good understanding of code versioning tools.
Excellent analytical, and problem-solving skills.
Proficient in English language with excellent written and verbal communication skills.
It will be considered as a plus if you have:
Experience working in cloud infrastructures like AWS or Azure.
Understanding of CI/CD, unit testing, integration testing.
Experience with Relational Database Management Systems.
Experience within the financial markets Industry on a similar IT field.
By joining us, you can expect:
A Unique Opportunity for a career in a global, fast-growing company.
Attractive remuneration package based on qualifications and experience.
Opportunities to learn and grow through our “Employee Training & Development program”.
Multiple events to bond with the team and the group.
Birthday and Loyalty benefits.
What to expect from our recruitment process:
First interview with hiring managers or an HR call
Test assessment
Technical Interview or home assignment
Final interview with top management
Make your next Career step and apply NOW!
*
Due to the great number of applications, we receive for each of our open vacancies, we are unable to respond on an individual basis
Location: North America
Workplace: Remote
At Linear, we're building the product development system for teams and agents. AI is fundamentally changing how software gets built, and we’re shaping the tools this new era requires.
Founded in 2019, Linear has become the platform of choice for more than 40,000 companies (including OpenAI, Coinbase, and Ramp) to plan, build, and ship their products. Today, our team is distributed across North America, Europe, and Australia, and we’re continuing to grow internationally. What unites us is relentless focus, fast execution, and a deep care for software craftsmanship.
We’re looking for experienced engineers who have shipped applied AI systems to production and want to define what the agent-native future looks like. We are building intelligence into the core of Linear, enabling the product to orchestrate coding, proactively move work forward, and power-up every software team.
You’ll work closely with product and design to transform foundation models into structured, reliable workflows embedded deeply in the core of Linear. We care deeply about keeping Linear fast, intuitive, and opinionated—AI is no exception.
Location & work mode
Linear is a remote-first company, with optional co-working offices in San Francisco, New York, and London. This role is open to candidates based in the North America. You can work from anywhere within this region. We value deep focus and async collaboration, with intentional moments to connect in person through team off-sites, optional co-working, and occasional travel.
What you'll do
- Build AI-powered product features that feel native, fast, and delightful to use
- Work with product and design to prototype and iterate on intelligent workflows and user interactions
- Design backend services to power natural language interfaces, smart suggestions, agentic workloads, and more
- Optimize prompts, fine-tune model behavior, and evaluate performance
- Help to guide our agent platform, allowing third parties to bring agents into the core Linear experience as teammates.
- Contribute to the architecture for AI-integration infrastructure that’s reliable and privacy-aware
What we're looking for
- 5+ years of experience building customer-facing products at a high-quality software company
- Strong React and TypeScript fundamentals, with experience across the full stack (Browser technologies, Node, GraphQL, PostgreSQL)
- Track record of driving complex, end-to-end features (not just incremental improvements and refactors) with visible impact on the product
- Product sensibility: you care about UX, speed, and polish, and you push back when something doesn't feel right
- Comfortable working without heavy PM overhead; you can help to shape the problem, not just implement a solution
- High ownership mentality: self-directed, full-lifecycle builder who takes a feature from idea to shipped
- Thrives in a remote, async-first environment with a lean, high-output team
- Experience at a startup or a company with a genuinely high engineering bar
Our tech
This stack reflects the systems we build and operate. You’re not expected to have experience with everything listed, but you should be excited to work close to product, performance, and real-world scale.
- Agentic workload system utilizing temporal, operating at production scale
- Proprietary websocket data sync framework built for speed and offline support
- React, MobX, styled-components on the frontend
- Extensive, widely used, GraphQL API and SDK
- Node, Postgres, Temporal, and Redis in the backend
- Hosted on Google Cloud with k8s
- GitHub, Slack, Notion
What we offer
We're a small, focused team that cares deeply about the quality of our work and the people we do it with. Here's what you can expect:
- Competitive salary and equity
- Employee-friendly equity terms including early exercise in the US and extended exercise windows
- Daily meal and coffee stipend on every workday
- Paid co-working space or desk
- Health coverage (based on country requirements)
- 5 weeks paid vacation, plus local statutory holidays
- 4 months paid parental leave
- Paid month off after 4 years & every 2 years thereafter
- Regular team events and off-sites
- Remote-first with no required commute
Learn how we think and work
- Read Me https://linear.app/readme a story about our mission
- Our hiring process: How we hire at Linear https://linear.app/now/how-we-hire-at-linear
- How we work: Designing remote work at Linear https://linear.app/now/designing-remote-work-at-linear
- Why and how we do work trials https://linear.app/blog/why-and-how-we-do-work-trials-at-linear Linear blog post
- Crafting quality that endures https://www.youtube.com/watch?v=pCil7YNhNCU Config keynote by our Co-founder & CEO, Karri Saarinen
- How we use AI in design https://designerfund.substack.com/p/ai-design-linear feature of Linear's design team
- Scaling our real-time sync engine https://linear.app/blog/scaling-the-linear-sync-engine talk by our cofounder, Tuomas Artman, at Linear's 2023 offsite
- First Round Capital: The Unsung Ingredient: Taste https://review.firstround.com/stripe-square-linear-product-taste/
- Our recent tender offer: Sharing Linear’s growth with the people building it https://linear.app/now/sharing-growth-with-the-people-building-linear
Linear is an equal opportunity employer. We do not discriminate based on race, color, religion, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, or any other protected characteristic under applicable law.
A note on recruitment fraud: all official Linear hiring communication comes from an @linear.app http://linear.app email address, and all open roles are listed at linear.app/careers http://linear.app/careers. We never ask candidates for payment or financial information. Suspicious messages can be reported to security@linear.app.
Location: European Union
Workplace: Remote
About the Role
Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimising promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.
If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast "PoC first" approach with a deep sense of ownership, we would love to hear from you.
Key Responsibilities
- Develop and maintain robust backend systems for our promotional features.
- Optimize existing systems for enhanced performance and scalability.
- Lead technical decisions and contribute to our SaaS solutions.
- Collaborate with distributed teams to innovate and implement new features.
- Ensure code and architectural excellence through reviews.
- Address complex technical challenges with innovative solutions.
- Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems.
Requirments
- Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly.
- Strong understanding of asynchronous programming and concurrency patterns.
- Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks).
- Experience with gRPC in production environments.
- Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB).
- Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes.
- Skilled in building and maintaining unit and end-to-end tests.
- Proven track record of delivering production-ready solutions.
- Experience working with large-scale microservices architectures.
- Degree in Computer Science or a related field (or equivalent practical experience).
Nice to Have
- Understanding of enterprise development patterns
- Experienced with large-scale microservices architecture
- Experience with cloud providers (AWS, GCP, etc.)
- Active performance observation
- Gambling domain experience
- Understanding of application security and industry standards, its best practice
What We Offer
- Competitive Salary
- Quarterly Bonuses
- Unlimited Paid Time Off
- Unlimited Paid Sick Leave
- Remote & Flexible Working
- Private Medical Insurance
- Financial Support for Life Events
- Professional Development Budget
- International Exposure
- Regular Company Events
*Benefits may vary depending on location and contractual agreement
Recruitment Process
- HR interview
- Technical interview (with Live coding)
- Final interview
Please take into account that sometimes the process may differ, your TA Partner will keep you updated.
Join us today!
By submitting your application, you acknowledge that your personal data will be processed in accordance with our Privacy Policy https://playson.com/privacy.
Location: Remote, Global
Supabase is the Postgres development platform, built by developers for developers. We provide a complete backend solution including Database, Auth, Storage, Edge Functions, Realtime, and Vector Search. All services are deeply integrated and designed for growth.
We're looking for an engineer to help build the future of distributed Postgres. You'll work on Multigres, our open-source distributed database system that brings horizontal scaling to Postgres.
In this role, you'll architect and implement critical distributed database infrastructure including sharding, consensus protocols, and materialization systems. You'll collaborate closely with our Postgres, networking, and infrastructure teams to push the boundaries of what's possible with distributed databases.
WHAT YOU’LL BE RESPONSIBLE FOR:
- Design and implement query routing logic for sharded databases
- Build consensus and replication systems to support distribute durability
- Develop materialization pipelines for migrations and change data capture
- Contribute to connection pooling infrastructure and intelligent workload isolation
- Collaborate with the open-source community on Multigres development
YOU MIGHT BE A GOOD FIT IF YOU HAVE:
- This role requires deep technical expertise in distributed databases and systems. For detailed qualifications, see our contributor qualifications document https://github.com/multigres/multigres/discussions/78.
Key areas of expertise:
- Database sharding, relational algebra, and Postgres internals
- Consensus protocols (Raft, Paxos, FlexPaxos) and distributed transactions
- Stream processing, materialization, and change data capture
- Building robust, performant distributed systems with strong observability
- Low-latency infrastructure and network protocol optimization.
WHAT WE OFFER
- Fully Remote
We hire globally. We believe you can do your best work from anywhere. There are no Supabase offices, but we provide a WeWork membership or co-working allowance you can use anywhere in the world.
- ESOP
Every team member receives ESOP (equity ownership) in the company. We want everyone to share in the upside of what we’re building together.
- Tech Allowance
Use this budget to set up your ideal work environment—laptop, monitor, headphones, or whatever helps you do your best work.
- Health Benefits
Supabase covers 100% of health insurance for employees and 80% for dependents, wherever you are. Your wellbeing and your family’s health are important to us.
- Annual Off-Sites
Once a year, the entire company gathers in a new city for a week of connection, collaboration, and fun. It’s a highlight of our year.
- Flexible Work
We operate asynchronously and trust you to manage your own time. You know what needs to be done and when.
- Professional Development
Every team member receives an annual education allowance to spend on learning—courses, books, conferences, or anything that supports your growth.
ABOUT THE TEAM
Supabase was born-remote and open-source-first. We believe our globally distributed team is our secret weapon in building tools developers love.
- ~400 team members
- 60+ countries
- 20+ languages spoken
- Over $1B raised (including our $500M Series F)
- 540,000+ community members
We move fast, build in public, and use what we ship. If it’s in your project, we probably use it in ours too. We believe deeply in the open-source ecosystem and strive to support—not replace—existing tools and communities.
Location: multiple locations
Role Overview:
At Cargoo we are building the infrastructure that makes Freight reliable and scalable.
Real-time logistics systems, built in .NET.
Problem space:
Logistics operations today are still largely:
manual
reactive
fragmented across tools
incomplete / late data
conflicting constraints
real-time decision pressure
evolving business rules
legacy + new system coexistence
We’re building a system that:
ingests real-time operational data
supports planning & execution decisions
adapts to constantly changing constraints
Design principles:
keep things simple before scalable
prefer explicit logic over magic abstractions
optimize for change, not perfection
avoid “framework-driven architecture”
accept that some parts will be ugly — temporarily
Tech stack:
.NET
Vue.JS
service-oriented architecture
relational + operational data storage
cloud-based infrastructure
What we expect from engineers:
Ability to navigate uncertainty and work in ambiguity
Willingness to
challenge decisions
Focus on
outcomes, not just code
Understanding of
trade-offs and complex systems
Preferring
ownership over comfort
What you wont find here
:
over-engineering everything upfront
unnecessary microservices
“clean architecture” for the sake of it
process-heavy development
If this resonates with you – lets talk!
Send us:
your LinkedIn / GitHub
OR a short message explaining what you’ve built and why it matters
Location: Limassol, Cyprus
Are you looking for the next professional opportunity, that will challenge you and advance your career?
Join our team now!
Tickmill is looking to hire a
Backend Developer (.NET)
to join our rapidly expanding team.
Join a high-caliber team and contribute to its success with your passion, hard-work and positive attitude.
About Tickmill.
Tickmill is an award-winning, multi-regulated broker offering access to a broad range of asset classes, including CFDs on Forex, Stocks, Indices, Commodities, Cryptocurrencies, and Bonds, as well as Exchange Traded Derivatives like Futures & Options).
Founded in 2014, the Tickmill Group employs over 330 professionals across offices in London, Cyprus, Poland, Estonia, Seychelles and several other locations worldwide.
Our culture is built on trust, transparency, and high standards. We bring together ambitious professionals who are looking for an environment that supports them to dominate in their fields.
Our diverse, multilingual teams are focused on innovation, delivering bold excellence, and raising the bar wherever we can.
We offer competitive benefits packages, frequent team initiatives, and opportunities for professional growth.
Join the Tigers!
What does the role look like?
The
Backend Developer (.NET)
will have the opportunity to:
Design, develop and support backend services with a focus on integrations with other systems, services.
Support and improve our quality processes by developing automated unit tests and performing code reviews.
Collaborate with internal/external teams throughout the integration process.
Identify, correct bottlenecks and fix bugs.
Help maintain code quality, organization, and automatization.
Stay up to date with new technology trends, applications, and protocols.
What do you need to succeed in this role?
Degree in Computer Science, Engineering, or a related field.
Good understanding of object-oriented programming and design patterns.
3+ years of software development experience, ideally in C#.
Ability to assess, troubleshoot and debug integration issues.
Good understanding of code versioning tools.
Excellent analytical, and problem-solving skills.
Proficient in English language with excellent written and verbal communication skills.
It will be considered as a plus if you have:
Experience working in cloud infrastructures like AWS or Azure.
Understanding of CI/CD, unit testing, integration testing.
Experience with Relational Database Management Systems.
Experience within the financial markets Industry on a similar IT field.
By joining us, you can expect:
A Unique Opportunity for a career in a global, fast-growing company.
Attractive
remuneration package
based on qualifications and experience (including 13th salary and Discretionary Bonuses to reward exceptional performance).
Opportunities to learn and grow through our “
Employee Training & Development program”.
Medical Insurance Cover
, which includes Outpatient, Inpatient, and Dental Care.
Multiple
events
to bond with the team and the group through Quarterly/Semestrial Team Activities for all the Company.
Participation in our welfare investment and savings plan through our
Provident Fund Scheme.
Birthday and Loyalty
benefits
.
Collaboration with SportBenefit.
What to expect from our recruitment process:
First interview with hiring managers or an HR call
Task Assessment
Technical Interview or home assignment
Final interview with top management
Make your next Career step and apply NOW!
*
Due to the great number of applications, we receive for each of our open vacancies, we are unable to respond on an individual basis.
seniorMontevideo
seniorVilnius; We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities
География найма не уточнена
United States, Remote
Зарплата не указана
ГибридseniorOptional offices and relocation support
