Senior Full Stack Engineer (JavaScript/TypeScript) (#397)

As a Software Engineer, you will collaborate with Product Owners, Business Analysts, UI/UX Designers, and fellow developers to build and maintain high-quality web applications.
The primary development language for this role is JavaScript/TypeScript.

Key Responsibilities

• Develop robust front-end and/or back-end applications using TypeScript with comprehensive unit tests.

• Design scalable and maintainable system architectures.

• Continuously seek and implement improvements in existing applications.

• Review code from peers to ensure adherence to best practices in efficiency, testability, readability, maintainability, and style consistency.

• Actively contribute to the Engineering Communities of Practice by sharing knowledge and promoting best practices.

• Mentor and support junior and mid-level engineers.

Minimum Qualifications

• 7+ years of experience in web application development using JavaScript/TypeScript.

• Strong front-end development skills using React.js and/or Next.js.

• Proficiency in HTML/CSS for clean and responsive UI implementation.

• Back-end development experience using Node.js with frameworks such as Express or Fastify.

• Solid understanding of RESTful API design and Swagger/OpenAPI specifications.

• Familiarity with relational databases like MySQL, including schema design and query optimization.

• Eagerness to learn new technologies (e.g., Next.js, Serverless Framework).

• Strong grasp of software engineering best practices with clean, maintainable code.

• Ability to make sound architectural decisions and build scalable systems.

• Initiative in identifying improvements and implementing them proactively.

• Experience with Agile/Scrum methodologies.

• Proficiency with AWS.

• Team-oriented mindset and ability to mentor junior engineers.

• Solid Git knowledge and collaborative development experience.

• Language Requirements: Business-level English and Business-level Japanese (JLPT N2 or above)

Preferred Qualifications

• Proficiency in Java and Spring Boot.

• Experience with NoSQL databases such as DocumentDB and Redis.

• Familiarity with OpenShift and/or Kubernetes.

• Experience in serverless architectures.

• Knowledge of microservices or service-oriented architectures.

• Experience using CI/CD tools such as Jenkins and SonarQube.