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Java Software Engineer - Payment systems

Tokyo Temporary ¥5,500,000 - ¥7,000,000 per year Japanese Corporate View Job Description
Join a large-scale technology organization that powers payment and incentive platforms used across a diverse digital ecosystem. As a Software Engineer, you will contribute to the development, operation, and continuous improvement of secure, scalable, Java-based payment solutions.
  • Develop mission critical payment services at scale
  • Work with modern cloud and microservices technologies

About Our Client

Our client is a leading technology and digital commerce organization with a large global ecosystem. The team develops payment and incentive platforms that support millions of users and focuses on security, scalability, and operational excellence.

Job Description

  • Design, develop, test, and deploy Java-based payment applications and APIs
  • Contribute to scalable and robust microservices architecture
  • Develop and maintain secure RESTful APIs and third-party integrations
  • Collaborate with engineers, product managers, and project managers to deliver business-critical solutions
  • Participate throughout the full software development lifecycle, from requirements gathering to production support
  • Analyze performance bottlenecks and implement optimization strategies
  • Support architecture improvements focused on scalability and maintainability
  • Create and maintain technical documentation
  • Conduct and participate in code reviews while promoting engineering best practices
  • Work with monitoring and distributed tracing tools to improve system observability
  • Leverage AI-assisted development tools to improve productivity and development efficiency
  • Contribute to continuous improvement initiatives across the engineering organization

The Successful Applicant

Required Qualifications

  • Experience as a Software Engineer or similar role
  • Strong proficiency in Java and SQL
  • Hands-on experience with Spring Boot and Spring Framework
  • Experience developing and maintaining RESTful APIs
  • Experience designing and implementing microservices architectures
  • Understanding of software design patterns, architecture principles, and development best practices
  • Knowledge of Git or other version control systems
  • Understanding of secure coding principles and application security
  • Experience with performance tuning and optimization
  • Experience working in Agile development environments
  • Business-level English proficiency (equivalent to TOEIC 800+)



Preferred Qualifications

  • Front-end development experience with HTML, CSS, and JavaScript
  • Experience with AWS or other cloud platforms
  • Experience with Docker and Kubernetes
  • Knowledge of distributed tracing and monitoring solutions
  • Experience with unit, integration, and performance testing frameworks
  • Experience in e-commerce platforms or online transaction systems
  • Experience using AI coding assistants such as GitHub Copilot or similar tools
  • Contributions to open-source projects or participation in technical communities

What's on Offer

  • Opportunity to build and enhance large-scale payment platforms
  • Exposure to high-traffic, security-focused systems
  • Modern engineering environment utilizing microservices and cloud technologies
  • Collaboration with international and cross-functional teams
  • Opportunity to adopt and expand AI-assisted software development practices
  • Stable long-term engagement with extension potential
  • Tokyo-based position with standard business hours (9:00-17:30)
  • Exposure to mission-critical products supporting a global digital ecosystem
Contact
Kayo Tojo
Quote job ref
JN-072026-7067831
Phone number
+81 366276145

Job summary

Function
IT
Specialisation
Programming / Development
Specialisation
Technology & Telecoms
Location
Tokyo
Job Type
Temporary
Consultant name
Kayo Tojo
Consultant phone
+81 366276145
Job Reference
JN-072026-7067831
Company Type
Japanese Corporate

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.