Block Labs
Crypto • Web 3 • B2B
Block Labs is a Web3-focused builder, investor, and marketing partner for blockchain projects. The company provides end-to-end blockchain development (smart contracts, decentralized wallets, NFT exchanges, payment gateways), web3-native marketing (social management, influencer/KOL campaigns, paid media, PR, partnerships), and investment support from seed to Series A. Block Labs works with founders to accelerate growth through technical development, go-to-market strategies, and strategic capital, operating from Sofia, Bulgaria.
Senior Backend Game Developer, Java
November 4
Block Labs
Crypto • Web 3 • B2B
Block Labs is a Web3-focused builder, investor, and marketing partner for blockchain projects. The company provides end-to-end blockchain development (smart contracts, decentralized wallets, NFT exchanges, payment gateways), web3-native marketing (social management, influencer/KOL campaigns, paid media, PR, partnerships), and investment support from seed to Series A. Block Labs works with founders to accelerate growth through technical development, go-to-market strategies, and strategic capital, operating from Sofia, Bulgaria.
📋 Description
• Design and implement core services that support multiplayer and single player gaming platforms • Build and maintain backend modules for user, wallet, and gameplay services • Implement REST and custom protocol endpoints for clients and partners • Design and optimize database schemas and manage migrations with Flyway • Ensure transaction integrity with JTA/Atomikos • Improve system scalability using Spring Boot, Infinispan, and Quartz Scheduler • Write robust, testable code with JUnit 5 and participate in reviews and CI/CD pipelines
🎯 Requirements
• 5+ years of backend development experience with Java (17–21) • Strong expertise in Spring Boot, Maven, and SQL database design • Experience with distributed systems, multi-threading, and containerised environments • Familiarity with real-time multiplayer or gaming backends (matchmaking, wallet logic, scoring) • Knowledge of REST APIs, microservice architecture, and network communication • Experience with Infinispan, Quartz Scheduler, or Apache MINA
🏖️ Benefits
• Mature, mission-driven, and low-ego culture • Ownership and strong fundamentals valued
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