Job Opportunity in Japan, Permanent role

 

 

■ Job Title

Backend Developer

 

 

■ Company Overview

This Japanese digital platform is the result of a merger between a major messaging app and a long-established internet portal company. It combines real-time communication tools with a wide range of online services, including news, shopping, financial technology, and entertainment. Serving millions of users across Japan, the platform plays a central role in daily digital life—offering secure messaging, mobile payments, and personalized content delivery.

 

■ Your Role and Responsibilities 

Design, implement, and deliver large-scale, complex systems that meet business and technical requirements.

Collaborate with product managers, frontend engineers, and other teams to support system design and development.

Leverage infrastructure solutions to solve large-scale challenges.

Share technical knowledge and best practices with the team, conducting code reviews, and participating in knowledge sharing sessions.

Debug and resolve product issues, troubleshooting any technical issues in a timely manner.

Demonstrate a problem-solving mindset, going to the root cause of issues and continuously improving the systems.

Support the code you write in production, ensuring reliability and performance in live environments.

 

■ Experience and Qualifications

Strong experience in object-oriented programming (OOP), preferably in JVM-based languages like Java, Scala, or C#.

Solid knowledge of distributed systems, concurrency, and high-traffic system design.

Hands-on experience with RESTful APIs, Pub/Sub systems, and database clients.

Experience with microservices and event-driven architectures.

Knowledge of RDBMS, NoSQL databases, and distributed caching solutions.

Proficient in data structures, algorithms, and software design principles.

Familiarity with AWS services (ECS, CloudFormation, CloudWatch) and CI/CD practices.

Experience in designing scalable systems and handling high traffic loads.

A degree in Computer Science, Computer Engineering, or 3+ years of equivalent SaaS platform development experience.

Business proficiency in English.

 

■ Work Location

Tokyo, Japan

 

Details will be provided during the meeting.