English summary for screening — check the original posting before applying.
Marui Unite, a tech company established in September 2024, is seeking a Backend Engineer to lead the migration of a large-scale fintech system from a monolithic architecture to microservices. This role involves driving technical decisions and collaborating with various stakeholders to modernize the Epos Card system, which handles ¥4.7 trillion in annual transactions.
Must-haves
- 5+ years of backend development experience in web services
- Experience designing and developing new features
- Experience involved in architectural design and technical decision-making
Nice-to-haves
- Experience developing large-scale or highly complex systems
- Experience in legacy system modernization projects
- Hands-on experience with microservices and API design
- Experience with CI/CD and DevOps implementation/improvement
- Experience in financial, FinTech, payment, or membership management systems
- Experience designing non-functional requirements (performance, availability, security)
- Knowledge of performance optimization, identity management, and authentication protocols
Tech stack
SwiftKotlinJavaJavaScriptTypeScriptAWSLambda (Node.js)Amazon Aurora PostgreSQLBigQueryGitHubSlackLookerNotionJiraFigma
Work style
Hybrid work is possible. Location: Tokyo, Nakano.
Other notes
Annual salary: ¥6,000,000 - ¥12,000,000.