Java App Engineer Tokyo - Haken | Spring - API - RDBMS Role
About the job
Join Japan's leading internet services company as a Java Application Engineer in a HAKEN (dispatch) position, open only to candidates residing in Japan. In this dynamic, large-scale environment, you'll contribute to mission-critical systems for one of the nation's top e-commerce platforms. You'll work with cutting-edge Java technologies, optimize APIs, and ensure high availability for millions of users.
Key Responsibilities
- Design and maintain scalable Java-based applications using Spring Framework
- Develop RESTful APIs and GraphQL endpoints to support seamless data exchange
- Optimize and manage RDBMS systems for high-performance data retrieval
- Participate in code reviews and implement best development practices
- Resolve technical issues and improve system performance and availability
Required Skills and Qualifications
Experience:
- 4+ years of Java development experience using Spring Framework
- Strong track record in building RESTful APIs and GraphQL services
- 3+ years managing relational databases (e.g., MySQL, PostgreSQL)
- Solid understanding of software development principles
Soft Skills:
- Proactive problem-solving and team collaboration
- Effective communication in cross-functional environments
Language Requirements
- Japanese: Conversational level
- English: Intermediate to Business level
Preferred Skills & Qualifications
- Experience with cloud platforms like AWS, GCP, or Azure
- Familiarity with Docker, Kubernetes, and microservices architecture
- Exposure to Agile development methodologies
About the Company
Be part of Japan's most innovative internet and e-commerce leader. This top-tier tech company empowers millions of users nationwide, with a focus on scalable systems, advanced engineering practices, and future-focused platforms. As an engineer, you'll work closely with highly skilled teams in a collaborative, forward-thinking culture.
Why You'll Love Working Here
- Direct impact on services used across Japan's e-commerce ecosystem
- Opportunities for professional development and tech skill advancement
- Station-side office with a casual dress code and minimal overtime
- Company cafeteria, full benefits, and education support included
- Flexible, dynamic work environment with modern tooling
Don't Miss Out - Apply Now!