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Senior Backend Engineer (RC)


Job Location:

Tokyo - Japan

Monthly Salary: Not provided by the employer
Posted: 25 July 2026 (30+ days ago)
Application Deadline: 22 October 2026
Vacancies: 1 Vacancy

Job Summary

Job Description

Career Opportunity for a Senior Backend Engineer in Japan!

Senior Backend Engineer (English speaking position)

Company Overview

A leading FinTech organization cashless payments in Japan offering innovative and convenient credit services integrated with a major digital payment platform.



Your Role and Responsibilities

We are looking for senior Backend engineers to build or rebuild rock solid services with a laser focus on scalability and maintainability.

Rearchitect our systems landscape: we want to reassess and fix the behind-the-scenes to power a top-notch user experience. It is bundled with difficult design challenges to solve: we simply want to get it right.

Design support the implementation and deliver large scale and complex systems

Manage teams stakeholders such as product managers or frontend engineers but also other team leads or non-tech stakeholders.

Leverage the infrastructure to solve such large scale problems.

Acts as a gatekeeper to the team quality standard

Triage debug and resolve product issues or other incoming inquiries

Mentor other team members and saveguard the team quality standards

Experience and Qualifications

5 years equivalent experience in SaaS platform development.

Experience in any OOP based language e.g Kotlin Java C# Scala etc.

Experience with RDBMS and NoSQL databases along with distributed cache.

Strong fundamentals in data structures algorithms and object oriented programming.

In-depth understanding of concurrency and distributed computing.

Back-end services:

Main implementations are in Spring Boot with a mix of Java 11/Spring Boot 2 and Java

17/Spring Boot 3.

Some legacy systems are written in Java EE.

Testing is done with JUnit and Mockito

Deployment relies on AWS ECS

CI/CD is handled by AWS CodePipeline

Infrastructure

All our services run in AWS

Infrastructure is managed by AWS CloudFormation

AWS CloudWatch is used for observability

Coding environment: GitHub IntelliJ Gradle

Documentation & Project management: Confluence Miro JIRA

Communication: Slack Zoom Office 365



Additional Preferred Qualifications
Experience with Java/Spring Boot framework

Experience with implementing platform components such as RESTful APIs Pub/Sub Systems Database Clients.

Experience in system design for high traffic application with scalability in mind

Experience with microservices & event-driven architecture

Experience gRPC communication design and implementation

Experience in a multicultural environment

Japanese conversational proficiency is a plus

Good Reasons to Join

Hybrid work environment within Japan

Work with International team members

Work Location

Tokyo Japan

Details will be provided during the meeting.






Required Experience:

Senior IC