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Jobs at KOMOJU

Fullstack Engineer

KOMOJU Tokyo | Remote

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EN: none
JP: none
6,000,000 - 8,000,000 JPY per year
Employment Type
Full time

Job Description

We are looking for engineers comfortable working with the full-stack. You will primarily work with Ruby, building out features using Ruby on Rails and Typescript with Vue.js. As our platform is growing rapidly, you will help us build our platform to handle payments on a global scale.

As an engineer you will work collaboratively with the team, to define features and architectures, and then implement them in code. You will also provide constructive feedback through code reviews, as well as architect discussions.

Our ideal candidate has experience working with large web applications. They will know how to build reliable, scalable, and performant web applications. Testing and code quality are also extremely important to us, so having a strong knowledge of testing and the different testing types is required.


  • Support team members through code review and architecture discussions
  • Write tests that validate the stability and correctness of implementations
  • Handle refactorings with both bravery and care


  • 3+ years of proven experience as a Full Stack Developer or similar role
  • Experience with building performant and scalable APIs, including DB performance
  • Experience with integrating with third party APIs in a secure and fault tolerant manner
  • Strong understanding of OOP programming languages and patterns

About the Company

KOMOJU (by Degica) is the leading cross-border payment gateway for Japan. We power payments for companies like video game distribution platform Steam and the popular mobile app TikTok. Today we help thousands of merchants by providing them with the payment infrastructure they need through developer-friendly API’s to integrations on popular platforms like Shopify and Wix; we help our merchants grow in all markets they are expanding.


  • At Degica, we embrace remote work while also offering office space for those who prefer in-person collaboration
  • 10 days regular vacation, additional 5 days summer and 5 days winter vacation
  • Paid birthday holiday
  • Budget for self-learning allowance, to ensure our employees’ skills remain current
  • Language training for Japanese

Developer-centric, flat, inclusive culture

You will work with other engineers in a flat and inclusive culture where engineers have a say in both product and technical decisions. The culture is largely self-organizing, which means engineers have both a stake and ownership in what they work on. Engineers play to their strengths, but are also able to invest in areas where they want to grow within the team. At KOMOJU, you are the main driver behind your growth and position in the company.

International at our core

Our founder is Canadian, and about 50% of our employees are non-Japanese. In the engineering team, we use English as our common language, and throughout the company, many people are bilingual.

Being an international company we know the importance of bilingualism. We offer all employees a choice between English and Japanese lessons.

We hire international software developers not yet based in Japan. You’ll have the option to work from your own country, or if you’d like to relocate here, we will help you get set up in Japan, including arranging temporary accommodation for you, and helping you to secure a permanent residence.

Passionate about technology

Developers at KOMOJU are passionate about their craft. To foster innovation, we have a monthly open hack day, where you can work on whatever you want. It could be something like trying a new programming language or tool, but sometimes developers create totally new tools, which become adopted by the company.

A generous holiday policy

In addition to your regular holidays (10 days of annual leave), you’ll get an extra paid holiday on your birthday, an additional week of vacation in the summer, and one week during the New Year.

Our hiring process

We’ve designed our hiring process to allow you to highlight what you can bring to our team.

It starts with you submitting your resume to us, after which it will be reviewed by our engineers and HR team. Rather than just your work history, we’re looking for something that demonstrates a passion for programming. This could be a personal project or open source contributions for instance. We want to work with people who love their trade, and work to improve their skills.

Assuming you pass the initial screening, we’ll invite you to an interview. For the interview, we’ll ask you to present to us something that you’ve built and can speak passionately about. Our engineers will then ask you open ended questions about what you’ve built. We’ve found this approach allows you to highlight your strengths to us, and demonstrate how you’d fit into the team.

After you pass three rounds of interviews, and a background check cleared, we’ll typically make an offer.