Senior Full Stack Engineer (PHP/Java/React)

️Title: Senior Full Stack Engineer (PHP/Java/React)

Department: Engineering

Location: UK or Europe, Remote

About Block Labs

Block Labs is a leading force in the Web3 space, incubating, investing in, and accelerating top-tier fintech, crypto and iGaming projects. With a mission to shape the future of decentralized technology, we partner with visionary startups to raise funding, refine product-market fit, and grow their audiences. Our diverse team drives innovation, using deep industry expertise and an extensive network to empower the next wave of blockchain-driven companies. At Block Labs, we’re passionate about turning bold ideas into breakthrough success.

About the Role

We’re currently building a state-of-the-art, modular, multi-tenant iGaming platform. This role sits at the core of the engineering team responsible for developing highly scalable services, intuitive frontend interfaces, and seamless third-party integrations, including games.

As a Senior Fullstack Engineer, you’ll work closely with the Tech Lead and cross-functional squads to deliver microservices and frontend components. While your main focus will be on Go, Java, and React, we’re looking for someone with a polyglot mindset — open to using PHP, Node.js, or other stacks when needed. Occasionally, you may also touch game-side logic or work on integrations for new providers.

Key Responsibilities:

• Develop, test, and maintain backend services and frontend interfaces.
• Contribute to the implementation of multi-tenant features with clear data separation and high configurability.
• Integrate third-party services and APIs, including game providers, wallets, and analytics tools.
• Ensure performance, security, and observability of the systems.
• Write clean, maintainable code and participate in peer reviews.
• Support documentation, deployment automation, and continuous integration workflows.
• Build and maintain internal tools and libraries that enhance development efficiency and support other developers.

About You:

• 5+ years of Fullstack development experience across modern backend and frontend technologies.
• Strong hands-on experience withGo,Java, andReact.
• Comfortable switching between technologies and working across multiple codebases.
• Experience designing APIs, working with microservices, and integrating third-party systems.
• Familiar with multi-tenant architectures, role-based access control, and secure systems.
• Exposure to observability practices, distributed tracing, and structured logging.
• Familiarity with cloud-native platforms, messaging systems, modern databases, and infrastructure-as-code tools.
• Background in iGaming is a plus.
• Clear communicator and proactive contributor in remote-first environments.