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Job ID : 1609323 Date Updated : August 25th, 2026
Contract-to-Hire

Senior Developer - Java Fullstack Exclusive job

Location Tokyo - 23 Wards, Sumida-ku
Job Type Temp to Perm
Salary 7 million yen ~ 8 million yen

Job Description

Nexus Internal Job ID: 15111

Job Title: Senior Developer - Java Fullstack (4 open positions)

Location: Kinshicho, Sumida-ku, Tokyo

Job Type: Contract-to-Hire 

Salary: Negotiable

 

Job Description:

We are hiring four (4) Senior Developers with Java Fullstack development experience to work on an Insurance project in Tokyo.

 

Responsibilities:

  • Backend Development: Build secure business logic and microservices using Java and frameworks like Spring Boot
  • Frontend Development: Design responsive user interfaces with Angular or React
  • API Integration: Develop and expose robust RESTful APIs or GraphQL endpoints to bridge the frontend and backend
  • Database Management: Design schemas, write optimized queries, and manage data via relational databases (MySQL, PostgreSQL) or NoSQL options (MongoDB)
  • Deployment & DevOps: Containerize applications using Docker and support CI/CD deployment pipelines on cloud platforms (AWS, Azure)
  • Quality Assurance: Write unit and integration tests (JUnit, Jest) and participate in peer code reviews
  • Should have worked in Agile lifecycle and have good understanding on how Scrum teams operate

Requirements

  • 7-9 years of work experience
  • Good hands-on knowledge of Java (JDK 8/11/17+), JavaScript / TypeScript, HTML5, CSS3
  • Knowledge of Core Java, Spring MVC, Java Spring Boot,  API Microservices, Python
  • Experience in Angular or React.js
  • Working knowledge of Database – MySQL, PostgreSQL, Oracle, SQL Server
  • Working experience in GitHub, Tomcat and Maven
  • Experience with AWS Services: S3, ECS, RDS
  • Exposure and participation in Agile / Scrum environment
  • Japanese language preferred, not essential

 

Language Skills:

  • Japanese:      Not Required
  • English:        Business

 

* Visa sponsorship available for candidates currently based in Japan.

General Requirements

Minimum Experience Level Over 6 years
Career Level Mid Career
Minimum English Level Business Level
Minimum Japanese Level None
Minimum Education Level Associate Degree/Diploma
Visa Status No permission to work in Japan required

Job Location

  • Tokyo - 23 Wards, Sumida-ku
  • Hanzomon Line, Kinshicho Station

Work Conditions

Job Type Temp to Perm
Salary 7 million yen ~ 8 million yen
Industry Insurance

Job Category

Company Details

Company Type Small/Medium Company (300 employees or less) - International Company
Non-Japanese Ratio About half Japanese