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Lead Backend Engineer - Fintech Platform & APIs

Tokyo 23 Wards Temporary ¥6,000,000 - ¥8,000,000 per year Foreign Multinational View Job Description
Join a growing product team to design and build backend systems powering a newly launched consumer-facing financial service. You will lead core design efforts, working across the full development lifecycle to deliver scalable, high-quality applications used by a large user base.
  • Shape a new consumer service at scale from early launch stage
  • Own basic design and backend architecture with modern tech stack

About Our Client

A leading domestic technology group with a large-scale digital services portfolio, operating consumer platforms used by millions. The organization continues to invest in new fintech-related products and offers a collaborative, multinational engineering environment.

Job Description

  • Lead basic design (high-level and detailed design) for backend systems
  • Design and build server-side applications using Java and Spring (including Spring Batch)
  • Collaborate with cross-functional teams (product, QA, infrastructure) to define and deliver new features
  • Develop robust, scalable APIs and batch processes
  • Ensure code reliability through unit testing and edge case validation
  • Diagnose and resolve performance issues; continuously optimize applications
  • Participate in code reviews and contribute to engineering best practices
  • Support full software lifecycle: requirements gathering, design, development, testing, and deployment
  • Work in an Agile/Scrum team to deliver incremental value



The Successful Applicant

  • 5+ years of experience in server-side development using Java
  • Strong experience with Spring Framework (including Spring Batch)
  • Solid database design and query optimization skills (RDB/NoSQL)
  • Experience with asynchronous processing (e.g., Kafka)
  • Hands-on experience with CI/CD pipelines and Kubernetes
  • Familiarity with version control tools (GitHub, GitLab, Bitbucket)
  • Proven ability to work in a team-based development environment
  • Strong problem-solving skills in complex or ambiguous scenarios
  • Business-level English proficiency

Preferred qualifications:

  • Experience in mobile application development or integration
  • Knowledge of web application performance tuning and security
  • Experience with public cloud platforms
  • Experience working in multinational teams

What's on Offer

  • Opportunity to lead design for a newly launched, high-impact consumer service
  • Modern technology stack with cloud-native and microservices architecture
  • International, collaborative engineering environment
  • Long-term project with stable engagement model
  • Office-based role in Tokyo with structured working hours



Contact
Serena Wu
Quote job ref
JN-062026-7042308
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-062026-7042308
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.