Senior Java Middleware / API Software Engineer (Bilingual Japanese/English)
About The Position
Join a forward-thinking Commercial Banking technology organization dedicated to building modern, scalable integration platforms that power mission-critical financial systems. This team operates at the center of enterprise application connectivity—designing and delivering high-performance middleware and API solutions that enable seamless communication across global systems and stakeholders. The environment is collaborative, Agile-driven, and innovation-focused, with engineers working closely alongside Product Owners, QA teams, architects, and international business partners. The team values clean architecture, engineering best practices, and thoughtful modernization, while maintaining the stability and rigor required in a regulated financial environment. This role offers the opportunity to contribute to enterprise-scale API platforms supporting global banking operations, including cross-border collaboration with Japanese and English-speaking stakeholders.
Requirements
- 8–10+ years of application development experience, with strong expertise in Java (Kotlin experience is a plus)
- Demonstrated experience designing and supporting customer-facing RESTful APIs
- Strong understanding of JSON, web services technologies, and data structures
- Experience applying design patterns in scalable, enterprise-grade applications
- Hands-on experience with Git, Jira, CI/CD tools, and DevOps practices
- At least 1 year of experience working with public cloud platforms (AWS, Azure, or Google Cloud)
- Proven ability to deploy applications to production and support the full application lifecycle
- Experience working in Agile development environments
- Professional-level bilingual fluency in Japanese and English (written and verbal), with ability to collaborate across global teams
- Bachelor’s degree in Computer Science or equivalent experience
- Strong communication skills, self-starter mindset, and ability to work independently in a structured enterprise setting
Nice To Haves
- Financial services or banking industry experience preferred
- Kotlin experience is a plus
Responsibilities
- Design, develop, and maintain scalable middleware and RESTful API applications using Java and Kotlin
- Partner with global stakeholders (Japanese and English-speaking) to translate business requirements into technical solutions
- Contribute to application architecture and apply design patterns to ensure scalability and performance
- Write high-quality, maintainable code with unit testing and automation
- Participate in code reviews and promote engineering best practices
- Support CI/CD pipelines and deployment processes in cloud environments (AWS, Azure, or GCP)
- Collaborate within Agile sprint cycles to prioritize and deliver features
- Troubleshoot and resolve production issues, ensuring system reliability and performance
Benefits
- Opportunity to work on large-scale, customer-facing API platforms within Commercial Banking
- Exposure to modern cloud environments and DevOps practices
- Collaborative Agile team culture with strong engineering standards
- Long-term, high-impact initiatives focused on scalability and modernization
- Cross-regional engagement with global teams in both Japan and the U.S.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
