[Remote] Backend Engineer | Build Scalable Systems for Millions of Users

A leading digital platform based in Japan is seeking a mid-level Backend Engineer to join its high-performing product engineering team. This is a rare opportunity to work on a large-scale content delivery system used by millions, where performance, scalability, and clean architecture truly matter. You’ll be joining a team that owns the full stack, builds everything in-house, and values autonomy, code quality, and continuous improvement. If you enjoy solving hard problems at scale and want your work to make a visible impact — this is the place. What You’ll Do: Design and build backend systems using Java, Go, Python or KotlinOwn features end-to-end: architecture, development, testing, deploymentImprove system performance, reliability, and maintainabilityCollaborate with cross-functional teams on product and platform improvementsContribute to tech evaluations, architecture reviews, and long-term planningWhat We’re Looking For: 3–5+ years of backend engineering experienceProficiency in Java Go, Python or Kotlin (Any is fine)Experience with both relational and NoSQL databasesStrong fundamentals and an agile, collaborative mindsetBonus: experience with microservices, Spring/JPA, gRPC/GraphQL, DDD, or DevOps practicesIntermediate Japanese (N3+)Why Join Us: Remote-first culture with flexible hours and locationHigh-impact work on a product with millions of users and strong technical challengesWell-funded and stable, but with a startup pace and energyReal ownership of architecture and technical direction — your ideas won’t just be heard, they’ll be shipped