Senior Fullstack Developer (Java) – Block Labs
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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 design autonomous multi‑agent AI systems, build decentralized financial infrastructure, or architect 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
You will join a multidisciplinary engineering team working on real‑time multiplayer and single‑player gaming platforms. This role is ideal for a developer with a strong Java background who can work confidently across backend services, frontend integrations, and supporting tools. A genuine fullstack engineer who can take ownership of features end to end.
Key Responsibilities
Design and develop backend services in Java 17+ using Spring Boot and Maven
Build and maintain microservice integrations across authentication, payments, chat, and gameplay
Implement and maintain REST and WebSocket APIs for game logic and real‑time communication
Integrate frontend clients (Dart, TypeScript, or similar) with backend systems
Develop and support integrations with third‑party platforms, payment gateways, and cashier services
Collaborate with product and backend teams to ensure seamless transaction management, wallet synchronization, and player balance handling
Contribute to frontend modules where needed, supporting UI logic and state synchronization
Collaborate on data modeling, schema design, and optimization
Participate in code reviews, debugging, and performance optimization
Ensure scalability, data consistency, and high availability across distributed systems
About You
Strong proficiency in Java 17+ and Spring Boot
Experience integrating with payment systems, third‑party APIs, or cashier services
Familiarity with WebSocket communication and real‑time data exchange
Solid understanding of REST API design and microservice architecture
Experience with SQL databases, schema design, and query optimization
Exposure to frontend development (Dart preferred, or JavaScript/TypeScript)
Knowledge of containerized environments (Docker) and CI/CD pipelines
Comfortable working in a multi‑repository, multi‑module setup
Understanding of state management, protocol‑based communication, and client‑server synchronization
Experience in real‑time multiplayer or financial transaction systems
Culture
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.
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