Block Labs

Location: Portugal; Albania; Georgia; Greece; Bulgaria; Kosovo; Bosnia and Herzegovina; Armenia; Italy; Spain; Malta; Romania; Ireland; South Africa; Croatia; Serbia; Montenegro Workplace: Remote ABOUT BLOCK LABS Block Labs is a premier technology studio operating at the bleeding edge of Web3, Artificial Intelligence, and iGaming. We don't just ship features; we engineer high-scale, production-grade platforms that power the next generation of digital products. We are a collective of senior engineers, product strategists, and builders who refuse to compromise on architecture. Whether we are designing autonomous multi-agent AI systems, building decentralized financial infrastructure, or architecting high-frequency iGaming platforms, our standard is excellence. We move fast, but we build for the long term. If you are looking to work alongside a team that values deep technical expertise, thoughtful system design, and product ownership, Block Labs is where you belong. THE ROLE We are building the frontend of a multi-brand consumer platform in React, Next.js and TypeScript: one codebase serving several brands, where launching a brand should be a matter of configuration, not a copy. You will be the most senior frontend engineer in the company and the person the platform’s UI depends on. We don’t hire into squads. We work as a small number of very strong individual contributors, each owning a product end to end and shipping with AI agents at a pace that used to take a team. You get an outcome and constraints, not a backlog: you find the decisions nobody has made, scope the work, build it, ship it and stay accountable for how it behaves in production. Product ideas often arrive as working prototypes built with AI tools by people outside engineering. Your job is to steer them into production, not to reject them or rebuild them from zero. KEY RESPONSIBILITIES: - Own the frontend end to end: architecture, conventions, quality bar and production behaviour of a multi-brand platform, with no spec handed to you. - Make adding a brand a configuration change: theming, brand-aware routing and content, and clean boundaries between shared and brand-specific code, all on a live product. - Build and own the design system and component library that engineers, designers and AI-assisted prototyping all draw from. - Turn product prototypes into production features fast, and build the workflow and tooling that make this repeatable. - Ship with AI coding agents every day as your main way of working, with the checks that keep quality high at agent speed, and raise the bar for how others use them. - Ship consumer-facing UI with real attention to detail, performance and accessibility. - Take UX and product concerns straight to the people who own the product, with alternatives and working examples, not just objections. ABOUT YOU: - 8+ years building production consumer-facing web applications, several of them at Staff or equivalent ownership. - You have taken a frontend from a rough brief to production and owned it, and you can say exactly what was yours, what was your team’s and what was your agents’. - AI coding agents are how you build, not a helper. You have your own setup and can say precisely where agents make you faster, where they produce plausible but wrong output, and how you catch it. - Deep expertise in React, Next.js and modern TypeScript, with clear opinions on rendering strategies and when each is the wrong choice. - Hands-on experience building or re-architecting multi-brand, multi-tenant or white-label frontends. - You have built or owned a design system and can discuss consistency versus flexibility, adoption and governance. - Strong UI and UX sensibility: you notice the small things and fix them without being asked. - Comfortable working with non-engineers who build with AI tools, and you design for their output to be usable. - Demonstrable Core Web Vitals work in production. - You thrive with autonomy and light process, and you write clearly. Strong command of written and verbal English. NICE TO HAVE - Experience with real-time, high-interaction consumer interfaces where latency and feel matter. - Background in fintech, crypto, real-time gaming and entertainment platforms, or other high-traffic consumer products. - Tooling, skills or integrations you built so agents work better inside a specific codebase or design system. - Working knowledge of CI/CD and cloud environments. WHAT THIS ROLE IS NOT - Not a management or lead role. Influence comes from what you ship. - Not a pure architecture role. You write production code every day. - Not for someone who wants a team, a backlog or a complete spec before starting. What kind of culture can I expect? Mature, mission-driven, and low-ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you’re one of the smartest minds in your craft and want to build with other experts, you’ll feel at home here.

Location: Portugal; Albania; Georgia; Greece; Bulgaria; Kosovo; Bosnia and Herzegovina; Armenia; Italy; Spain; Malta; Romania; Ireland; Croatia; Serbia; Montenegro Workplace: Remote ABOUT BLOCK LABS Block Labs is a premier technology studio operating at the bleeding edge of Web3, Artificial Intelligence, and iGaming. We don't just ship features; we engineer high-scale, production-grade platforms that power the next generation of digital products. We are a collective of senior engineers, product strategists, and builders who refuse to compromise on architecture. Whether we are designing autonomous multi-agent AI systems, building decentralized financial infrastructure, or architecting high-frequency iGaming platforms, our standard is excellence. We move fast, but we build for the long term. If you are looking to work alongside a team that values deep technical expertise, thoughtful system design, and product ownership, Block Labs is where you belong. THE ROLE Data & Intelligence now sits at the centre of several products we are developing, and we need a platform that is both dependable and capable of supporting more advanced intelligence over time. This role reflects that shift. We are designing a new data platform that will act as the backbone for everything from real time decisioning to predictive modelling. As a Data Platform Engineer in the Data Team, you will own the end-to-end real-time pipeline, serving data across a unified analytical warehouse and feature-serving layer. You are not building dashboards. You are engineering the commercial nervous system of a multi-tenant platform designed to scale from one operator to 10x with marginal infrastructure cost. KEY RESPONSIBILITIES: - Design, build, and maintain scalable data pipelines using AWS Glue (PySpark), or equivalent orchestration and transformation tools. - Engineer and optimise the ClickHouse warehouse for sub-second query performance across all back-offices. - Implement data contracts between back-office and the platform. Onboarding a new operator is a config change, not new tables, topics, or feature views. - Build the feature-serving layer providing pre-computed features to AI agents at millisecond latency. - Integrate with third-party databases, back-office APIs, and external systems (CRM, affiliates, acquisition platforms). - Establish monitoring, alerting, and maintenance procedures including pipeline health checks, freshness monitoring, anomaly detection, and data contract SLA enforcement. - Own CI/CD and infrastructure-as-code for data workloads. - Collaborate with data scientists, agent engineers, BI developers, and infrastructure teams to translate data requirements into reliable, production-grade pipelines. ABOUT YOU: - 3+ years building and operating production data pipelines at scale, with hands-on experience across both streaming and batch paradigms. - Expertise in Apache Kafka (or Amazon MSK): topic design, consumer group management, offset handling, schema registry operations, and production troubleshooting of lag, rebalancing, and throughput issues. - Strong SQL and warehouse engineering skills: experience with columnar analytical databases (ClickHouse strongly preferred, or similar: Druid, BigQuery, Redshift). - PySpark / Spark Streaming proficiency: writing transformation jobs that normalise, enrich, and enforce business rules on event streams. Experience with AWS Glue, Apache Airflow, or Apache NiFi is a strong plus. - Data modelling discipline: ability to design normalised, multi-tenant schemas where tenant isolation is a filter, not a fork. Experience with data contracts and schema governance. - CI/CD and infrastructure-as-code experience: automated testing of data pipelines, version-controlled deployments (CloudFormation, Terraform, or CDK), and familiarity with containerised workloads (ECS Fargate or Kubernetes). - Data quality and observability mindset: experience implementing pipeline health monitoring, automated data validation (Great Expectations or equivalent), freshness checks, and anomaly detection. NICE TO HAVE - Experience in iGaming, online casino, poker, or sportsbook platforms. - Exposure to blockchain or crypto-native transaction flows, including on-chain event ingestion, token-denominated accounting, or stablecoin settlement. - Comfortable operating in an AWS-native environment (MSK, Glue, S3, DynamoDB, ECS, IAM). You understand serverless tradeoffs and can size infrastructure for cost efficiency. - Feature store experience (SageMaker, Feast, or Tecton) building offline/online feature pipelines that serve ML models at inference time. - Prior work in regulated industries (financial services, gambling, fintech) where data lineage, auditability, and compliance are non-negotiable. - Experience migrating legacy query engines (Athena, Trino, Presto) to modern analytical warehouses with reconciliation frameworks to validate correctness. HOW WE WORK - Fully remote with asynchronous-first communication. EU time zone overlap is preferred. - Small, high-autonomy team within the Data function. You report to the Head of Data and co-ordinate with the AI, BI, and Infrastructure Teams. - Architecture decisions are documented and debated. You will participate in design reviews and own your domain decisions. - We build for multi-tenant scale from day one. Every pipeline, schema, and contract you ship must absorb a new operator without engineering effort. - On-call rotation will be established in the run phase. During the build phase, the focus is velocity with quality. No firefighting legacy systems. What kind of culture can I expect? Mature, mission-driven, and low-ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you’re one of the smartest minds in your craft and want to build with other experts, you’ll feel at home here.

Location: Portugal; Albania; Georgia; Greece; Bulgaria; Kosovo; Bosnia and Herzegovina; Armenia; Italy; Spain; Malta; Romania; Ireland; South Africa; Croatia; Serbia; Montenegro Workplace: Remote ABOUT BLOCK LABS Block Labs is a premier technology studio operating at the bleeding edge of Web3, Artificial Intelligence, and iGaming. We don't just ship features; we engineer high-scale, production-grade platforms that power the next generation of digital products. We are a collective of senior engineers, product strategists, and builders who refuse to compromise on architecture. Whether we are designing autonomous multi-agent AI systems, building decentralized financial infrastructure, or architecting high-frequency iGaming platforms, our standard is excellence. We move fast, but we build for the long term. If you are looking to work alongside a team that values deep technical expertise, thoughtful system design, and product ownership, Block Labs is where you belong. THE ROLE We build distributed, transactional backend platforms across crypto, fintech, and real money gaming. High volume, multi tenant, real time. Balances, payments, and player facing decisions depend on them, so correctness is not negotiable and mistakes are visible immediately. The work spans several products and follows business priorities, so what you own will change over time. You will build and own distributed, transactional backend services in Go, as an individual contributor. Ownership has a specific meaning here. You receive an outcome and its constraints, not a decomposed backlog. You identify the decisions nobody has made and gather the context to make them. You define scope and sequencing. You make the architectural and implementation decisions. You implement the system rather than delegating it. Others will contribute to it, and you own the conditions that let them do so without degrading it. You ship it, and you remain responsible for how it behaves in production. Agents are the normal means of production here, not an optional aid. That does not reduce the need for engineering judgement, testing, or operational ownership. It increases how much of each one engineer carries. You will collaborate with product, engineering, infrastructure, and QA throughout, and you will need to be good at it, because nobody will be coordinating it on your behalf. WHAT YOU WILL DO • Convert business outcomes and constraints into scoped, sequenced, shippable work. • Design and implement distributed Go services handling high volume transactional workloads, integrating with payments, providers, and internal platforms. • Make the correctness guarantees explicit and hold them. Balances and transactional behaviour have no margin for approximation. • Run the agentic system that produces the work: context, decomposition, execution, verification. • Set the harness and guardrails others work inside: context, tests, and automated checks that let people contribute to your system without it degrading into debt you inherit. • Operate what you ship. Know its failure modes, watch it, and fix it. WHAT WE ARE LOOKING FOR • Deep proficiency in Go on high volume, transactional systems. Years matter less than what you have personally taken to production. • Strong judgement on multi tenancy, event driven architecture, queues, and the failure modes each brings. Cloud native, and serious about reliability, observability, and security. • A repeatable agentic engineering system you built deliberately. It holds context, decomposes ambiguous work, verifies behaviour rather than diffs, and keeps unverified code out of production. The system matters, not the tools. • Evidence of carrying the whole chain yourself, from incomplete objective to a system you shipped and then owned in production. Having worked on every phase is not the same as having carried one. • Judgement under ambiguity. There is rarely a finished specification, but there are objectives, constraints, and people who know things. Make the reversible calls yourself and escalate the rest. NICE TO HAVE • Background in fintech, real money gaming, or other high traffic consumer products where money is at stake. • Experience with rules engines, real time scoring, or decisioning systems. • Prior experience designing APIs for multi tenant or white label products. WHAT THIS ROLE IS NOT • Not a management or tech lead role. There is no team reporting to you and no plan to create one. • Not an architecture or advisory role. You will not set direction for others to implement. • Not a squad role. There is no prioritised backlog and no one assigning you work. • Not a role where you own one layer of somebody else’s implementation, or where someone else owns verification and production readiness on your behalf. • Not a role where agents are an optional productivity aid you reach for occasionally. If what you want is a well defined squad, finished requirements, and shared implementation, this is a role to skip. That is a legitimate way to work and many strong engineers prefer it. It is not this one. What kind of culture can I expect? Mature, mission-driven, and low-ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you’re one of the smartest minds in your craft and want to build with other experts, you’ll feel at home here.

Location: Portugal; Albania; Greece; Bulgaria; Kosovo; Bosnia and Herzegovina; Italy; Spain; Malta; Romania; Ireland; Croatia; Serbia; Montenegro Workplace: Remote ABOUT BLOCK LABS Block Labs is a premier technology studio operating at the bleeding edge of Web3, Artificial Intelligence, and iGaming. We don't just ship features; we engineer high-scale, production-grade platforms that power the next generation of digital products. We are a collective of senior engineers, product strategists, and builders who refuse to compromise on architecture. Whether we are designing autonomous multi-agent AI systems, building decentralized financial infrastructure, or architecting high-frequency iGaming platforms, our standard is excellence. We move fast, but we build for the long term. If you are looking to work alongside a team that values deep technical expertise, thoughtful system design, and product ownership, Block Labs is where you belong. ABOUT THE ROLE We are building the backend that powers how players experience our platform: a set of multi-tenant services that turn high-volume player activity into engaging, personalised, and trustworthy experiences. It is a broad and evolving remit, with real room to shape new products and capabilities as the platform grows. You’ll be joining a senior, highly technical team building greenfield backend services that react to player activity in real time and at scale. We value autonomy, craftsmanship, and long-term thinking, and we’re building event-driven systems designed for resilience, low latency, and trust. KEY RESPONSIBILITIES: - Design and build distributed backend services that power player engagement across a multi-tenant platform. - Develop core platform features and services across a broad and evolving set of player-facing domains, from engagement and personalisation to platform integrity. - Consume and process high-volume player activity streams, integrating with internal platforms (payments, game providers, player data) and relevant third-party tools. - Collaborate with product, frontend, data, and infrastructure teams to deliver reliable, end-to-end systems. - Contribute to architectural design and drive technical decisions across services. - Ensure scalability, fault-tolerance, and data integrity, including the correctness guarantees required when balances and player-facing decisions are involved. - Maintain clean, testable, and well-documented Go code following industry best practices. ABOUT YOU: - 6+ years of experience in backend development, ideally on high-throughput, real-time, or consumer-facing systems. - Strong proficiency in Go as a primary backend language; experience with gRPC and RESTful APIs is highly valued. - Solid understanding of distributed systems, multi-tenant architectures, and microservices. - Experience building consumer-facing or platform services where engagement, personalisation, or platform integrity matter is a strong advantage. - Comfortable working in cloud-native environments. - Deep commitment to software reliability, observability, and security best practices. - Excellent communication skills and a collaborative mindset. NICE TO HAVE: - Experience with rules engines, real-time scoring, or decisioning systems. - Background in fintech, real-time gaming and entertainment platforms, or other high-traffic consumer products. - Familiarity with event-driven systems, Kafka, or message queues. - Prior experience designing APIs for multi-tenant or white-label products. What kind of culture can I expect? Mature, mission-driven, and low-ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you’re one of the smartest minds in your craft and want to build with other experts, you’ll feel at home here.