Backend Engineer

Tokyo
Partial Remote
Full-time
October 14, 2025

About the position

We are looking for a Backend Engineer to help drive the growth of whoo, our location-sharing app that has achieved over 30 million organic downloads. The mission for this position is to contribute to the growth of the service and business by collaborating with related departments as a whoo Backend Engineer.

Responsibilities

Designing, developing, and operating API servers for iOS / Android applications
Application development on our location-sharing platform
Maintaining the infrastructure and improving the code quality of each service
Designing, developing, and operating systems that integrate with external services

Requirements

3+ years of backend development experience
Experience with database table design
Experience with API design and implementation
Experience with code reviews

Nice to haves

While not specifically required, tell us if you have any of the following.

Experience using whoo in your daily life
Designing, developing, reviewing, and releasing web applications using Ruby on Rails
Identifying technical issues within and outside the team, and proposing/implementing solutions
Handling inquiries for your area of responsibility, including confirming specifications and conducting technical research
Driving projects in collaboration with engineering managers and scrum masters

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About LinQ

LinQ inc. develops and operates the location-sharing app "whoo" with the vision of "creating a communication app used worldwide."

The desire to "build closer friendships" is not limited to a specific generation. It's a universal wish shared not only by young people, but by people of all ages.

By having the ability to easily share your location, whoo allows users to effortlessly generate opportunities to meet up with friends and help make sending invitations like "I'm nearby now, fancy a cup?" or "Wanna go to that bar together?" become more seamless and natural.

whoo lowers the barriers to communication, creating a world where friends can become even closer more easily.