
Lead - Java Fullstack Developer
Nexus · Sumida-ku, Tokyo
All reasons
In its favour
- Still listed on the employer's own board
We are hiring two (2) Leads with Java Fullstack development experience to work on an Insurance project in Tokyo.
Responsibilities
- Design scalable microservices, manage system integrations, and optimize database schemas
- Develop modular user interfaces and build high-performance, secure backend APIs and frontend applications
- Conduct code reviews, enforce coding standards, and mentor junior developers
- 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
- Collaboratively work with cross functional teams
Requirements
- 10+ years of work experience out of which at least 2-3 years of experience as a Lead managing/mentoring a team of junior developers
- 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
Skills
- Java
- Spring Boot
- Angular
- React
- GraphQL
- MySQL
- PostgreSQL
- MongoDB
- Docker
- AWS
- Azure
- JUnit
- Jest
- JavaScript
- TypeScript
- HTML
- CSS
- Spring MVC
- Python
- Oracle Database
- SQL Server
- GitHub
- Tomcat
- Maven
- S3
- ECS
- RDS
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