Бэкенд вакансии - в офисе

Location: Limassol Cyprus Workplace: OnSite Scorewarrior is a game developer and publisher based in Limassol, Cyprus. The company focuses on the 4X strategy genre, with an ambitious goal to grow its hit game, Total Battle, to become the No.1 strategy game in the world. Our team consists of 200+ passionate, talented, self-driven, and continually developing professionals who love making high-quality games. Our product: We are currently working on Total Battle — an MMO 4X strategy game with a deep political system and lots of player interaction. Players take on the role of a commander and need to develop their city, forge alliances, fight against monsters, and conquer other players. We're constantly developing new game mechanics, and the project is continuing to grow. Our game project has a code base of ~300k SLOC and consists of multiple services running in several hundred instances. The game services are a sharded system for horizontal scaling. Our team is looking for both Middle and Senior specialists with confident knowledge of C++ and design principles to work on creating new game features for a large-scale multiplayer project with long-term gameplay. Our team's objective and the challenge they face is to create an outstanding technical design that ensures quality, flexibility, and simplicity in the development of in-game features. Tasks: - Design and implement solutions for new game mechanics — based on documentation from game designers, create a technical design and implement it. - Prepare RFC documents describing your approach and discuss them with the team before implementation. - Deliver your solution to production and ensure it runs smoothly by monitoring its behavior after deployment. - Refactor and optimize existing functionality to improve performance, maintainability, and scalability. - Perform code reviews for other team members and follow team coding guidelines and best practices. - Create functional prototypes to validate ideas and mechanics when necessary. - Write and maintain technical documentation for implemented features and decisions. - Participate in team meetings and discussions to stay aligned on priorities and progress. Requirements: - Strong communication skills and initiative. - 3+ years of experience developing in C++ in a product-oriented company - At least 2 years of backend development experience (not necessarily in C++) - Solid knowledge of software design principles and ability to apply them in practice. - Ability to analyze and decompose complex tasks into smaller, manageable steps. - Practical experience with network and multithreaded programming - Practical experience with relational databases - Proficiency in Linux environments for development and debugging. - Knowledge or willingness to learn Python for developing tools and automation. The following would also be to your advantage: - Having samples of code that you can show us. - Knowledge of other high-level programming languages (for general awareness). - Practical experience applying Domain-Driven Design in real-world projects - Hands-on experience building applications using Akka.NET http://Akka.NET, Microsoft Orleans, or similar actor-based frameworks We use: - C++20, Clang, and CMake. - Boost — only for the library, not for game code. - PostgreSQL. - GitLab, TeamCity, Ansible. - SonarQube, Clang-Tidy, Clang-Format. - Onboarding, coding conventions. - Python for utilities. - Linux. Our technical developments: - A library/framework of ready-made solutions for creating game features. - ORM — allows us not to have to write code for saving to the DB. - A code generator for a binary RPC protocol and ORM. - A pub/sub event system for game clients. - Telemetry that allows for real-time product status tracking (through Grafana). - An expression interpreter for flexibility in game configuration. - HotReload environment, with everyday game updates. - Sync and Async network designs. - Internal Event System. - Internal persistent and transactional message system. - R-tree based world map. What we offer and our benefits: - A team of professionals with a passion for gamedev and a drive to make Total Battle the #1 strategy MMO game. - An excellent remuneration package, including a 13th salary. - Full relocation coverage for you and your family to Cyprus (Limassol). - A modern, sunny office close to the sea. - Private health insurance for you and your family members. - A monthly pre-school, school, and university allowance for employees' children. - Lunch compensation. - A sports and fitness allowance. - Company-funded personal development opportunities (professional and language courses, books, etc.). - Bonuses for outstanding results, years of service, marriage, and childbirth. - Friendly monthly office parties and epic annual offsite company birthday and Christmas celebrations.

Задачи: — разработка ML-моделей для LLM-спецпроектов Алисы Требования: — опыт работы с Python Условия: — гибридный формат работы

Location: Almaty, Kazakhstan Workplace: OnSite WHY WORK AT HIGGSFIELD AI? Higgsfield AI is the fastest-scaling generative AI company in history, hitting $1B in annual revenue run rate, 30M+ users worldwide, 6M+ generations per day, and powering 390 of Fortune 500 brands. We're building at the absolute frontier of AI-powered video creation and next-generation creative tools. Joining Higgsfield means becoming part of a high-impact team shaping the future of AI-native experiences, at a company that isn't just moving fast, but rewriting what fast looks like. WHO WE ARE LOOKING FOR Everyone at Higgsfield is an A-player. We’re looking for teammates who bring: - Deep backend expertise, with a strong focus on scalable systems and APIs. - A systems thinker who can design architectures that handle millions of users. - Readiness to thrive in a high-intensity startup environment. - Comfort in a high-intensity startup environment, where priorities shift fast. WHAT YOU WILL WORK ON - Architect & scale robust data pipelines from diverse web sources. - Handle large volumes of unstructured data (video, audio, images, text). - Analyze web apps & APIs for stable data extraction. - Own the full data acquisition process: automation, integrity, efficiency. YOUR MUST HAVES - 5+ years of experience. - Experience with highload systems. - Proven track record with large-scale data ingestion systems. - Media content storage & delivery optimization. - Strong knowledge of databases. - Performance tuning & profiling. - CDN, caching, message queues. - Independent, able to lead complex projects. - Willingness to work in a fast-paced startup environment. THE DEAL - Competitive salary in USD + stock options. - On-site role in our Almaty office (we will relocate you from anywhere) - Full-time position with high growth potential.

Location: New York, NY (HQ) Workplace: OnSite ABOUT RAMP Ramp is building the smart infrastructure for finance teams, embedded in the transaction flow of every dollar a business spends. We automate how over $275B in annualized spend flows in and out of 85,000+ companies: authorizing payments, flagging risk, categorizing spend, and closing books. The problems are high-stakes, data-dense, and unforgiving. We hire people with high agency and high urgency. We look for slope over intercept. We care less about where you trained and more about what you’ve built. At Ramp, everyone is a builder who owns problems end to end and makes consequential decisions that shape the outcome. The median Ramp customer saves 7.5% and grows revenue 16% in their first year – far in excess of businesses operating without Ramp. We believe every ambitious company deserves the same. If you want to build systems that directly shape how companies move and manage billions, Ramp is the place to do it. Explore our Engineering Blog https://builders.ramp.com & Emerging Talent https://builders.ramp.com/emerging-talent Blog to learn more about how we build at Ramp and what it’s like to start your career here. ABOUT THE ROLE Ramp is, at its core, an engineering company. We’re looking for backend engineering interns (12 or 16-week co-ops) excited to solve challenging technical problems and ship products used by real customers. You’ll work alongside experienced engineers and own meaningful projects from inception to production. We value strong technical fundamentals, high ownership, and people who learn quickly, whether or not they’re familiar with our stack. WHAT YOU’LL DO - Build performant, reliable, and scalable systems powering Ramp’s products - Own meaningful projects from design through launch - Solve problems across areas like payments, risk and fraud, financial infrastructure, data, and AI - Work closely with product and business teams to understand customer needs and improve our products - Contribute to engineering tools and systems that help Ramp scale WHAT YOU’LL NEED - Currently pursuing a B.S. or higher in Computer Science or a related technical field, graduating December 2027 or later - Strong computer science and programming fundamentals - Track record of building and shipping high-quality products, features, or projects - Ability to turn ambiguous product and business problems into engineering solutions - Desire to learn quickly, take ownership, and work in a fast-paced environment NICE TO HAVES - Experience with or interest in Python and backend development - Familiarity with or desire to learn our stack, including Flask, PostgreSQL, Temporal, Elixir, and AWS - Interest in fintech, AI, or building products at scale COMPENSATION The monthly rate for this internship is $12,500 + a housing stipend. RAMP BENEFITS - Apple MacBook - Catered lunches and dinners in our NYC office Monday through Friday   BENEFITS AVAILABLE TO ALL FULL-TIME RAMP EMPLOYEES (GLOBAL) - Flexible PTO - Centralized home-office equipment ordering - Health and wellness stipend - Budget for intra-office travel - Weekly coffee stipend UNITED STATES - 100% medical, dental & vision insurance coverage for you, with partial coverage for dependents - One Medical annual membership - 401(k), including employer match on contributions made while employed by Ramp - Fertility HRA (up to $10,000 per year) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay - Pet insurance - In-office perks: lunch, snacks, drinks, and more - Relocation expense coverage to NYC or SF (if needed) CANADA - Group medical, dental, and vision coverage through Sun Life - Life, AD&D, and disability coverage - Fertility drug coverage (up to $4,000 lifetime) - Group Retirement Plan with employer match (RRSP + DPSP) - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay, with additional time available at reduced pay - Employee Assistance Program and virtual care through Lumino Health UNITED KINGDOM - Private medical insurance through Freedom Elite - Virtual GP and at-home care via eMed x Livi - Workplace pension through Penfold, with salary sacrifice option - Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay with additional time available at reduced pay REFERRAL INSTRUCTIONS If you are being referred for the role, please contact that person to apply on your behalf.   OTHER NOTICES Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.   Beware of recruiting scams: Ramp will only contact you through official @Ramp.com http://Ramp.com email addresses and will never ask for payment or sensitive personal information during the hiring process.   Ramp Applicant Privacy Notice https://ramp.com/legal/applicant-privacy-notice

Location: Montreal Workplace: onsite ABOUT YOU   You will play a pivotal role in delivering high-impact software solutions across our platform. You bring curiosity, initiative, and a passion for clean, scalable systems. You collaborate effectively with teammates and cross-functional partners to design, build, and improve our technical stack. You’re hands-on, deeply engaged in the code, and consistently seeking better ways to solve complex engineering challenges.     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 Software Engineering & Problem Solving: Build and ship reliable, secure, and scalable backend systems. Own implementation from design to deployment, ensuring maintainability and performance. Participate in architectural discussions and offer informed technical input. Refactor legacy codebases to improve structure and efficiency while maintaining feature continuity. Drive production readiness by handling incident response, root cause analysis, and observability improvements. Technical Excellence: Write clear, testable, and well-documented code, emphasizing quality and automation. Contribute to a culture of engineering excellence through code reviews and design discussions. Advocate for sound software development practices and continuous improvement. Collaboration & Impact: Work closely with product managers, designers, and other engineers to align on objectives and deliverables. Contribute to technical scoping and estimation for features and infrastructure work. Identify opportunities to reduce technical debt and improve the developer experience. Qualifications & Skills 6+ years of professional experience in software engineering. 2+ years of hands-on experience with Go (Golang ) in production environments. Strong experience working with PostgreSQL and/or MySQL. Proficient with containerization and orchestration tools: Docker, Kubernetes (K8s), and Helm. Familiarity with messaging systems like RabbitMQ or Kafka. Comfortable using Git and CI/CD tooling in collaborative workflows. Working knowledge of frontend technologies, especially React and/or Next.js . Basic understanding of cloud platforms (GCP preferred). Nice to Have: Experience building scalable, secure Login-as-a-Service platforms. Deep knowledge of OAuth2, OIDC, SAML, JWT, and session/token management. Strong grasp of social login, SSO, and federated identity. Designed multi-tenant identity systems with isolation and configurability. Delivered developer-friendly APIs, SDKs, and integration documentation. Strong English communicator, for both technical and non-technical topics. 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 medical, dental, and vision, PTO, 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 Backend 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

Location: Limassol Cyprus Workplace: OnSite Scorewarrior is a game developer and publisher based in Limassol, Cyprus. The company focuses on the 4X strategy genre, with an ambitious goal to grow its flagship game, Total Battle, into the No. 1 strategy game in the world. Our team consists of 200+ passionate, talented, self-driven, and continually developing professionals who love making high-quality games. Our mission: to unite and excite people all over the world. We are looking for an experienced Senior Backend Developer for our Core Team to work on key game project functionalities. We strive for simplicity, scalability, maintainability, and excellent quality in our solutions. Our team's main goal and challenge is to deliver outstanding technical design while ensuring quality, flexibility, and ease of development for game features. Tasks to be solved - Designing and developing the Core backend component and creating user-friendly APIs with Doxygen descriptions. - Refactoring and isolating existing modules and eliminating technical debt. - Preparing and reviewing ADRs/RFCs, formulating architectural solutions within your team/service, and presenting them to the architectural board for discussion. - Conducting code reviews and design reviews of game mechanics. - Maintaining high quality by writing unit and integration tests, implementing metrics, and profiling code. - Planning, decomposing, and delegating sub-tasks and evaluating the results thereof. - Developing tools and scripts for automating internal development processes. To succeed, you will need - 6+ years of commercial development. - Knowledge of C++ or willingness to transition to this programming language. - The ability to participate in creating or reviewing architectural documentation (ADRs/RFCs). - Practical experience in software design: SOLID, YAGNI/KISS/DRY, patterns. - Knowledge of Service-Oriented/Action(Command)-based approaches. - Networking & Concurrency: TCP/HTTP, RPC (gRPC/protobuf), thread-pools, and an understanding of async/await. - Observability: Prometheus/InfluxDB, Grafana, or analogues. - English - B1 or higher, Russian - B2 or higher. The following would be to your advantage - Experience with Go, Java, Kotlin, C#. - Gamedev experience. - Experience in designing large-scale modules / components / services. What we offer - A Great Place to Work. 99% employee satisfaction, low turnover, and colleagues who genuinely enjoy collaborating. - Live and work in sunny Cyprus. We’re an office-first team in Limassol with a modern seaside workspace, and full relocation and visa support for you and your family. - Shape a global hit. We’re the only European studio with a 4X strategy title in the world’s top-10. Our top-50 mobile game has grown 25x in revenue and audience in the last five years. - Grow fast in a company that’s already strong. We’re independent, financially rock-solid, and expanding at startup speed, and we have never had lay-offs. - Work where ideas win. Flat structure, collective decision-making, and honest feedback create full transparency and help you grow fast. - Earn industry-leading rewards. High salaries, a 13th month, performance bonuses, and extra rewards for long service, marriage, or welcoming a child, and lunch every day. - Feel supported at every stage of life. Private family health insurance, plus a monthly allowance for children’s pre-school, school, and university education. - Your growth is our priority. From specialized training and certifications to language courses and books, you’ll have everything you need to keep learning.

Задачи: — Разработка бэкенд-функционала с использованием PHP (OOP-подход); — Работа с фреймворком Laravel на проектах production-уровня; — Написание и оптимизация запросов PostgreSQL; — Внедрение и поддержка интеграций с внешними API; — Настройка и поддержка серверных окружений (Nginx + PHP-FPM + PostgreSQL на Ubuntu через WSL или VirtualBox); — Коллаборация через Git-workflow; — Выполнение базовых задач, связанных с фронтендом при необходимости (JavaScript, AJAX, основы Vue, HTML/CSS). Требования: — Опыт работы с PHP (OOP) от 2 лет; — Практический опыт работы с Laravel; — Уверенная работа с PostgreSQL (написание запросов); — Знание JavaScript (функции, AJAX, базовый Vue); — Базовое понимание HTML и CSS; — Опыт настройки бэкенд-окружений на серверах Ubuntu; — Использование Git для контроля версий; — Ответственность и умение работать самостоятельно. Условия: — Работа в современном офисе в Риге; — Конкурентная зарплата; — Ежегодный пересмотр зарплаты с учетом инфляции; — Возможности для профессионального роста; — Дружелюбная и поддерживающая рабочая атмосфера в команде.

Задачи: — Разработка, поддержка и улучшение веб-приложений. — Создание чистого, эффективного и документированного кода. — Интеграция сторонних API и сервисов. — Реализация мер безопасности и защиты данных. — Оптимизация производительности и масштабируемости приложений. — Проведение код-ревью и участие в командной работе. Требования: — Опыт backend-разработки на Python от 5 лет. — Глубокий опыт с astAPI для создания RESTful API и микросервисов. — Практика работы с API-гейтами (Kong, WSO2) и системами аутентификации (Keycloak, AD). — Опыт интеграции с системами очередей: Apache Kafka, RabbitMQ. — Знание CDN (CloudFront, Cloudflare) и кэширования. — Опыт с CI/CD (Git, Azure DevOps), контейнеризацией. — Стек данных: PostgreSQL, Oracle PL/SQL, Redis, ELK. — Английский язык B2. — Будет большим плюсом: Опыт интеграции с Oracle E-Business Suite R12.2(PL/SQL, публичные API), знание Oracle SOA Suite(BPEL, OSB, Mediators), опыт с Kubernetes и оркестрацией контейнеров, углубленное понимание PostgreSQL, Oracle DB, Elasticsearch. Условия: — Работа с международными компаниями: Samsung, TUI, Ryanair, Johnson & Johnson и др. — Стабильная заработная плата, пакет бонусов и benefits. — Программа компенсации профессиональных сертификатов. — Внутренняя база знаний с курсами.

Задачи: — Лидирование backend-команды: проектирование, разработка и поддержка высоконагруженных backend-систем — Быть центром технической экспертизы по интеграциям и архитектуре бэкенда — Постоянное улучшение системы: производительность, масштабируемость, надёжность, удобство эксплуатации — Определение и контроль соблюдения стандартов кодирования, code review и инженерных практик — Взаимодействие с system / DevOps-инженерами для обеспечения стабильного деплоя и поддержки сервисов — Формирование и поддержка backend-процессов разработки — Принятие ключевых технических решений по backend-направлению — Ответственность за прогресс backend-разработки (статусы, планирование, Jira) — Подготовка и сопровождение ADR и Dev Plans — Поддержка и актуализация технического roadmap — Развитие наблюдаемости сервисов (мониторинг, алерты, метрики) — Участие в работе с продакшен-инцидентами: координация, анализ причин, предотвращение повторений — Проведение 1-1 встреч с участниками backend-команды — Поддержка и развитие команды: участие в создании PDP (Personal Development Plans) — Отслеживание новых технологий, подходов и лучших практик backend-разработки Требования: — Общий опыт коммерческой разработки — от 5 лет — Опыт работы с Go — от 3 лет (или 1+ год Go при условии 5+ лет на C++/Java/Rust) — Опыт управления командой (Lead/Tech Lead) — от 2 лет — Умение выстраивать и масштабировать команду, развитые коммуникативные навыки — Глубокое знание экосистемы Go: структуры данных, конкурентность, память, GC — Опыт работы с реляционными БД (PostgreSQL), умение писать и оптимизировать сложные SQL-запросы — Опыт разработки распределённых систем — Понимание принципов распределённых приложений и микросервисной архитектуры — Хорошее понимание Linux — Опыт контейнеризации (Docker) — Умение писать тестируемый код и unit-тесты — Сильный практический опыт работы с Kafka (внутренние и внешние интеграции) — Опыт работы с Kubernetes — Готовность развивать как технические, так и soft-навыки Будет плюсом: — Опыт работы с NoSQL решениями (например, ScyllaDB) — Опыт разработки highload-систем — Реальный опыт в iGaming — Опыт работы с финансовыми системами или доменами с повышенными требованиями к целостности данных — Знание и практическое применение архитектурных подходов: DDD, Clean Architecture, Hexagonal Architecture Условия: — Официальное трудоустройство по ТК Сербии — Офис класса А+ в историческом центре Белграда — Релокационный пакет: компенсация авиабилетов и оформление ВНЖ на вас и членов семьи, компенсация депозита и первого месяца аренды, покрытие процента риэлтора арендной квартиры в Белграде — Возможности для профессионального и карьерного роста в компании — ДМС + занятия корпоративным английским языком

Location: San Francisco Workplace: OnSite ABOUT US: AI NEEDS A NEW INFRASTRUCTURE LAYER. WE'RE BUILDING IT AT MODAL. Every era of computing brought new workloads that previous infrastructure couldn't support: mainframes, databases, and the cloud. Each time, the company that rebuilt the layer underneath defined the decade. AI is no different, except it touches everything instead of one slice, and the window to build the layer underneath it is open right now. Our customers include category-defining companies like Ramp https://modal.com/blog/how-ramp-built-a-full-context-background-coding-agent-on-modal, Cognition, DoorDash, and Suno. They rely on Modal for instant GPU access, sub-second container starts, and native storage, so it's simple to serve low-latency inference, fine-tune models, and access production-ready sandboxes at scale. We've passed $1B in annualized run rate, up 15x from a year ago. In October 2026 we raised a $750M Series D led by Accel at a $15.75B valuation. Our team includes creators of popular open-source projects (e.g.,Seaborn https://github.com/mwaskom/seaborn,Luigi https://github.com/spotify/luigi), academic researchers, international olympiad medalists, and experienced engineering and product leaders with decades of experience. THE ROLE: We’re looking for strong backend engineers who love building developer tools used by the largest AI companies in the world. You’ll be building for things at scale, but also for new AI workflows that change every day. YOU MAY BE A FIT IF: - You’ve built and shipped modern web applications end-to-end - You’re comfortable working across the stack: TypeScript on the frontend, Python services on the backend, and ClickHouse for data and analytics - You have deep knowledge of observability tools and patterns used for large-scale workloads such as custom sandboxes and training and inference for large language models (LLMs) and diffusion models - You have experience with at least one of the following: billing/payments systems, B2B SaaS tooling, enterprise software, or LLM/diffusion model inference and training workloads - You have strong product instincts and think about customer problems, not just tickets - You’re able to participate in our on-call rotation and respond to production incidents - You make good tradeoffs between shipping fast and building for scale - You’re able to work in person in our NYC or SF office

Location: San Francisco, CA; Boston, MA; New York, NY Workplace: OnSite ABOUT US At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale. With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world. Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater. ABOUT THE TEAM The LangSmith team owns and builds LangChain's core platform for observability, evaluation, and production reliability of AI systems. From tracing and annotation to run rules, evaluations, and beyond, this team owns LangSmith end-to-end. If you want to define what great AI observability looks like at production scale, this is where that work gets done. ABOUT THE ROLE We are looking for a Senior Backend Engineer to join us. In this role you will be building the backend systems that power LangChain’s observability and evals platform. You will work on the core services that allow developers to monitor and evaluate their AI applications at scale. While the focus is on backend feature development, familiarity with fullstack or frontend engineering, performance tuning, and debugging production issues would be extremely valuable. WHAT YOU'LL DO - Design, develop, and maintain backend services and APIs to support LangSmith’s tracing, monitoring, and evaluation workflows. - Collaborate on architectural decisions to ensure systems are performant and maintainable. - Optimize storage and query performance for high-volume observability and evaluation data. - Ensure system reliability through strong testing, monitoring, and alerting practices. - Troubleshoot and resolve production issues, performing root-cause analysis and implementing long-term fixes. - Create and maintain technical documentation, including system design and API references. - Work closely with full-stack engineers, product managers, and product designers on rolling out new features. WHAT YOU'LL BRING - 5+ years of professional experience in backend engineering working on highly complex products - Proficiency in one or more backend languages/frameworks, ideally Python or Go - Strong understanding of API design and building reliable data services. - Experience with high-throughput or mission-critical systems. - Demonstrated ability to optimize backend services for performance and reliability. - Experience with database systems (Postgres, Redis, Clickhouse), and cloud platforms (AWS, GCP, Azure) - Strong communication skills, with the ability to collaborate cross-functionally - Customer centricity and ownership mentality Compensation Annual salary range: $180,000- $240,000 Compensation Philosophy: We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. We are hiring for this role across a range of scope, and the compensation band reflects that. Your offer depends on what we learn about your impact, craft, leadership, and communication during the interview process. We will tell you early where you’re tracking and talk comp with you before offer stage. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations. BENEFITS Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.