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Job ID : 1602927 Date Updated : July 20th, 2026
Architect Scalable API Platforms

Senior Architect for Scalable API Platforms in Japan

Location Tokyo - 23 Wards
Job Type Temporary
Salary 6 million yen ~ 8 million yen

Job Description

This role leads technical feasibility, high-level design, and architecture standards for a large-scale API and API Gateway platform. You will guide engineering teams through clear technical specifications, code reviews, and hands-on contributions to elevate system quality and scalability.

Client Details

Our client is a leading, large-scale e-commerce platform in Japan, supporting a vast ecosystem of merchants and partners. The organization operates mission-critical API infrastructure that underpins core business operations and ongoing platform innovation.

Description

  • Conduct technical feasibility studies for new features and platform improvements
  • Lead high-level system design for API Gateway and API management infrastructure
  • Create clear architecture and technical specification documents for engineering teams
  • Perform code reviews to ensure development quality and consistency
  • Develop prototype or production code when required
  • Drive technical alignment across engineering, product, and security teams
  • Define and promote API standards, best practices, and governance frameworks
  • Analyze industry trends and recommend improvements to technical strategy
  • Support multi-team collaboration within a distributed development environment

Job Offer

  • Opportunity to define the technical direction of a core API platform
  • Work on high-scale, complex systems with strong business impact
  • Collaborate with diverse, globally minded engineering teams
  • Influence architecture decisions that directly affect delivery speed and quality
  • Exposure to advanced API, cloud, and distributed system technologies
  • Tokyo-based role within a collaborative, English-speaking engineering environment

To apply online please click the 'Apply' button below. For a confidential discussion about this role please contact Serena Wu on +81 3 6627 6137.

General Requirements

Minimum Experience Level No experience
Career Level Mid Career
Minimum English Level Fluent
Minimum Japanese Level Daily Conversation
Minimum Education Level Bachelor's Degree
Visa Status Permission to work in Japan required

Required Skills

  • 5+ years of software engineering experience, including 2+ years in architecture or technical leadership roles
  • Strong track record in technical feasibility analysis for distributed systems
  • Expertise in high-level system design (API, microservices, cloud infrastructure)
  • Proven ability to produce clear technical specifications and architecture documentation
  • Hands-on experience with API design (REST, gRPC) and API Gateway solutions (e.g., Kong, AWS API Gateway, Apigee)
  • Experience improving development processes (CI/CD, testing strategies, design reviews, release governance)
  • Ability to review code and contribute high-quality production code when needed
  • Business-level English communication skills
Preferred Qualifications:
  • Experience with API management platforms and developer portals
  • Cloud platform experience (AWS, GCP, or Azure)
  • Knowledge of API security patterns (OAuth2, mTLS, rate limiting)
  • Experience in microservices or event-driven architectures
  • Agile/Scrum development experience
  • Basic to business-level Japanese reading and writing (not mandatory)

Job Location

  • Tokyo - 23 Wards

Work Conditions

Job Type Temporary
Salary 6 million yen ~ 8 million yen
Industry Software

Job Category