Full Stack Engineer (Bilingual – Japanese/English)

Job DescriptionPosition: Full Stack Engineer (Bilingual - Japanese/English)Type: Full-time | Hybrid | Japan-basedOverviewWe are seeking an experienced Full Stack Engineer to help design, develop, and scale a high-traffic enterprise SaaS platform in a fast-growing, bilingual engineering environment.This is a hands-on role where you will work across the full stack, from backend to frontend, driving new feature development, infrastructure optimization, and overall product improvement.Key ResponsibilitiesDevelop and maintain scalable backend and frontend systems.Implement new features aligned with the product roadmap.Optimize infrastructure for performance and reliability.Improve UI/UX and developer experience (DX).Collaborate cross-functionally in Japanese and English to deliver high-quality solutions.RequirementsRequired5+ years of professional software development experience.Full-cycle development ability (design to deployment).Strong coding and testing skills with TypeScript, NestJS, React/Next.js.REST API design experience.Database experience (SQL/NoSQL).Business-level Japanese and English communication skills.PreferredExperience in startups or product management.Scalable architecture design for large data and traffic.Go language or gRPC development experience.Domain-Driven or Clean Architecture experience.Ideal CandidateProactive and comfortable working with ambiguity.Balances short-term goals with long-term technical excellence.Promotes learning, collaboration, and technical improvement.Motivated to contribute to both product and team growth.Work Style & CompensationCompetitive salary (based on experience).Hybrid work model with flexible office attendance.Standard working hours with flex-time system.Full social insurance and comprehensive benefits.