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シニアJavaバックエンドエンジニア/ Java Senior Backend Engineer/Java Tech Lead

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A global company is currently looking for a Java Senior Backend Engineer/Java Tech Lead.

  Location:Osaka

  Salary 8 – 9 mil/ annual

  Hiring company:Large global company (大手グローバル企業)

  Start date: (Can negotiate)

  Type of employment:Temp to Perm * 6-12 months later, the candidate will be perm

  Remote Work:Once a week

Responsibilities:

  • Design, develop, test, and maintain large-scale e-commerce backend and frontend systems for Marketplace
  • Deliver high-quality features by understanding business requirements and collaborating with cross-functional teams
  • Drive system improvements through refactoring, performance optimization, architectural enhancements, and adoption of appropriate technologies
  • Maintain highly available 24/7 services, including monitoring, troubleshooting, and bug fixing
  • Design and develop RESTful APIs and microservices to support scalable, maintainable systems
  • Contribute to continuous improvement of development processes, code quality, and engineering best practices
  • Collaborate proactively with engineers to improve operations and deliver an exceptional shopping experience with fast time-to-market

Requirements:

  • 10+ years of experience in software design and development
  • 5+ years of hands-on experience with Java / Java EE, including JVM internals (class loading, memory management, GC tuning)
  • Strong experience with RESTful API design and Microservices Architecture
  • Experience with Docker, Kubernetes, CI/CD pipelines (e.g. Jenkins), and system monitoring tools
  • Solid understanding of software development lifecycle, including code reviews, source control, testing, and build automation
  • Ability to enhance and modernize legacy systems while working within existing constraints
  • Passion for building scalable, high-performance, and highly available systems in a collaborative environment
  • **Japanese is not required for this position**

Keywords:

IT, バックエンド, 開発, グローバル, エンジニア, 在宅, 大阪 求人

Job Ref: DL42M6

Contract Type: Contract / Haken

Specialism: Information Technology

Focus: Development

Industry: New Media and Internet

Salary: ¥8,000,000 - ¥9,000,000 per annum

Workplace Type: Hybrid

Experience Level: Senior Management

Location: Osaka

Job Reference: DL42M6-46B07D33

Date posted: 21 July 2026

Consultant: Seiya Makino