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Senior Java Engineer - Lead API Design in Fintech

Tokyo 23 Wards Temporary ¥6,000,000 - ¥8,000,000 per year Foreign Multinational View Job Description
Join a high-impact engineering team building incentive and payment platforms used across a global digital ecosystem. This role focuses on leading backend design and delivering secure, high-performance APIs at scale.
  • Build scalable platforms powering global digital payments
  • Lead design decisions in a modern Java/Spring ecosystem

About Our Client

A large, globally recognized technology-driven organization operating in e-commerce, fintech, and digital services. The team develops incentive and payment platforms that support millions of users and drive ecosystem growth across multiple markets.

Job Description

  • Design, develop, and maintain scalable Java applications using Spring Boot and the Spring Framework
  • Lead the implementation of robust RESTful APIs for system integrations
  • Ensure adherence to secure coding standards and application security best practices
  • Utilize containerization (Docker) to enhance deployment efficiency and consistency
  • Write and optimize SQL queries; ensure high database performance
  • Apply established design patterns to build clean, maintainable, and reusable code
  • Collaborate with cross-functional teams to define requirements and troubleshoot production issues
  • Continuously evaluate and adopt new technologies to improve system performance and reliability



The Successful Applicant

  • Strong proficiency in Java development
  • Deep hands-on experience with Spring Boot and the Spring Framework
  • Solid understanding of application security principles
  • Proven ability to design and implement RESTful APIs
  • Experience with Docker or similar container technologies
  • Strong knowledge of relational databases and SQL
  • Familiarity with design patterns and clean architecture principles
  • Business-level English (e.g., TOEIC 800+ or equivalent)

Preferred (Nice to Have):

  • Experience with AWS or other cloud platforms
  • Knowledge of microservices architecture and distributed systems

What's on Offer

  • Opportunity to lead backend design for mission-critical fintech platforms
  • Exposure to large-scale, globally deployed systems
  • International and collaborative engineering environment (English-speaking)



Contact
Serena Wu
Quote job ref
JN-072026-7062676
Phone number
+81 3 6627 6137

Job summary

Function
IT
Specialisation
Programming / Development
Specialisation
Technology & Telecoms
Location
Tokyo 23 Wards
Job Type
Temporary
Consultant name
Serena Wu
Consultant phone
+81 3 6627 6137
Job Reference
JN-072026-7062676
Company Type
Foreign Multinational

Diversity & Inclusion at Michael Page

We don't just accept difference - we celebrate it. We encourage applicants from all backgrounds to apply for this role and are committed to building inclusive, diverse workplaces where everyone can thrive. If you require any support or reasonable adjustments during the recruitment process, please let us know.