Tech Lead - Backend Engineer

Remote OK - Anywhere in Japan
Full-time
September 1, 2025

Job details

We have a lot of engineers who love the latest modern technologies and develop products from scratch. Our strength is to start from the early stage, such as planning through production level utilizing MaaS / FinTech/ IoT/ AI/ VR technologies.

As an engineer, you will be responsible for all aspects of development from planning to implementation, including technology selection, architecture code review, implementation and more. Working closely with PMs, directors, and designers to provide high-quality solutions with industry-standard best practices while also leading engineers outside of Japan.

Develop products from scratch (0-1)
Delivered more than 2200 projects
Wider range of technology including MaaS/ Fin Tech/ IoT/ AI/VR
Diversity team members
As a global tech company, we share our knowledge across the world for the best practice.
Full flex working ours
Working from anywhere in Japan
Variety of career Growth based on your goal

Development environment

Frontend： TypeScript,Javascript
Backend： Golang, Ruby, Node.js, Java, PHP
Mobile： Flutter, Kotlin, Swift
Frameworks： React, Vue.js, Node.js, Ruby on rails, Laravel, Spring boot
Public cloud： AWS, Azure, GCP
Database： RDB, NoSQL
Project management： JIRA, Confluence, Backlog, Redmine
Code management: Github
Communication tools： Slack, Zoom
Design tools： Figma, Adobe XD, Zeplin, Sketch

Requirements

More than 5 years of backend experience in either Java/PHP/Ruby/Golang/Javascript or equivalent technologies.
Experience in API development, batch, performance tuning
Experience with designing, architecting, and/or building solutions in any cloud platform.
Ability to deliver performing and maintainable code.
N3 equivalent or above Japanese level to be able to join meetings in Japanese

Nice to have

Frontend skills Or knowledge with modern technologies such as React, Vue.js etc
Experience building large-scale performing web applications.
Experience working and leading offshore teams.

APPLY NOW ➜🇯🇵 Residents Only

About Monstarlab

Monstarlab’s mission is to harness diversity and transform the world through technology.

Together with their clients, Monstarlab drives digital innovation and supports business transformation through co-creation.

Monstarlab’s services span digital product development, enterprise system development, design, strategy and operations consulting, and AI-driven development — all aimed at enabling client success and accelerating digital transformation.

The company also places great value on empowering each employee to take on new challenges. In a constantly evolving world, Monstarlab employees are encouraged to embrace change, enjoy the process of taking on challenges, and grow through cross-functional collaboration at the individual, team, and organizational levels.