Backend Engineer (Java / Go)

Want to build systems that handle real traffic, real complexity, and real product impact? We’re hiring a Backend Engineer to join the core engineering team behind one of Japan’s most widely used digital platforms. This isn’t maintenance work — you’ll design and ship backend systems that power millions of daily user interactions. You’ll work in an environment where engineers own decisions, challenge assumptions, and continuously improve architecture at scale. What You’ll Work OnDesign and develop backend services in Java or GoTake features from idea to production — architecture, implementation, testing, deploymentImprove latency, resilience, and observability across critical systemsReduce technical debt while scaling traffic and feature complexityContribute to architecture discussions and long-term platform evolutionWhat You Bring3–5+ years building backend systems in production environmentsStrong proficiency in Java or GoExperience with relational + NoSQL databasesSolid understanding of APIs, distributed systems, and performance tradeoffsComfortable working in agile, product-driven teamsBusiness level English and Japanese (N2 or more)Nice to Have Microservices architecture experienceSpring / JPA, gRPC, or GraphQLDevOps or cloud infrastructure exposureDomain-driven design mindsetWhy This Role Stands OutFully remote within Japan — strong async engineering cultureSystems that operate at real scale (not theoretical scale)A stable, profitable product with the speed of a startup teamEngineers drive architecture — not just implement ticketsClear impact: your code ships to millionsIf you're ready to build backend systems that matter — and want ownership beyond just writing code — let’s talk.