Senior QA Engineer

KOMOJU Musashino-Shi, Tokyo
  • 💴 ¥10M ~ ¥14M annually
  • 🏡 Fully remote
  • 🧪 Minimum years of experience unspecified
  • 💬 No Japanese required
  • 🌏 Apply from abroad
  • 🧳 Relocate to Japan


KOMOJU Musashino-Shi, Tokyo

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.

Key benefits

  • Developer-centric, inclusive culture
  • International at our core
  • Generous holiday policy

About the position

We are looking for our first QA engineer who are comfortable developing, implementing testing processes and methodologies and tools to identify and address any issues or defects in the features and products we want to release. They are responsible for coordinating and conducting tests to ensure the software runs smoothly and meets client needs. This involves reviewing system specifications, executing test scripts, reporting/documenting technical issues, and collaborating with the development, product managers and stakeholders. The ideal candidate will have proven experience as a QA tester or similar role, an understanding of project management and QA methodology, and excellent communication skills.

We primarily write in Ruby and deploy to AWS, so understanding how to conduct testing and QA in these environments will be vital. Familiarity with Ruby is not a requirement for this role, as the company is happy to invest time and resources for you to learn.


  • Assist in establishing a scalable QA process and methodology that integrates seamlessly with the development process and aims to minimize the occurrence of issues, bugs, or usability problems that could adversely affect our users
  • Work closely with development teams, product managers and other stakeholders to understand technical requirements and provide input on design considerations
  • Work with teams to develop a test plan appropriate for the scope and scale of the project.
  • Test case design and execution
  • Identify, document and prioritize defects and issues
  • Collaborate with the development team providing detail information on the circumstances of the defect and potential solutions


  • Proven experience as a QA tester or similar role
  • Experience in project management and QA methodology
  • Ability to document and troubleshoot errors
  • Hands on experience with automated testing tools like Selenium or Cypress and RSpec
  • Experience working in agile/scrum development process
  • Strong attention to detail
  • Excellent communication skills


10 to 14 million JPY annually.

Includes (rough estimate of) profit share. Based on experience and skill level.

Hiring Process

  1. 1

    Initial Screening

    Your application will be reviewed by our engineers. 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.

  2. 2

    Two interviews

    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.

  3. 3


    After you pass two rounds of interviews, we’ll typically make an offer.


Meet KOMOJU's Developers

Nigel was fresh out of college when he joined KOMOJU as a developer. He's now risen to tech lead, where he's helped build out their payment platform while maintaining a healthy work-life balance.

Read his story...

Nicole joined KOMOJU in 2020, and worked her way up to be technical lead of the merchant management team. She shares her journey, how KOMOJU supported her career growth and how the company is adapting to its growing needs.

Read her story...

Other Jobs at KOMOJU

Related jobs

More jobs like this

I'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, I don’t share or sell it.