Migaku
Migaku

Senior Backend Developer

April 21, 2025
Full-time
¥8,000,000/yr - ¥14,000,000/yr
Remote · Shibuya-ku, Tokyo, Japan
Mid-Senior level
Back-end Developer
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Location: Full remote, APAC + European Timezones

Role: Full time

About Migaku

Connecting with another language can be challenging, especially when you're just starting out. We've been there, and we know how difficult it can be. But the tools we've created are game-changers. They’ll support you from your first words to advanced fluency.

If you want to learn to speak and, more importantly, understand a language the way a native speaker does, then immersion is the only path.

Migaku is here to guide you on that journey, from your first steps to fluency and beyond! Our product is a powerful Chrome extension that turns your favorite websites into simple and effective learning materials by providing translations on words, subtitles, and more.

About The Position

We are seeking a dedicated and driven Senior Backend Developer with a "ship-first" mindset who takes initiative to deliver results quickly and support our growth. You should be prepared to work efficiently, adapt to new technologies as necessary, and confront the challenges that will arise as we launch our next marketing campaign and expand rapidly. Your contributions will play a crucial role in the success of the company.

Key Responsibilities:

  • Maintain and develop new features for all our products: Website, iOS & Android Apps, Browser Extension, and Web App.
  • Develop and maintain a Firebase-powered account system coupled with Stripe for financial transactions.
  • Collaborate with team members on integration work across different platforms.
  • Interact with users to triage and fix issues.
  • Write and maintain unit and end-to-end tests to ensure high-quality code.
  • Contribute to code reviews and team best practices.

Requirements:

  • A strong passion for language learning, with studying an Asian language—particularly Japanese—being an added bonus.
  • 3+ years of experience as a Software Engineer (Back-End, Front-End, or Full-Stack).
  • Ability to develop and maintain backend components in Kotlin, Javascript and Python.
  • Strong experience with Google Cloud or other cloud technologies.
  • Strong Linux proficiency.
  • Experience working with Firebase account systems.
  • Familiarity with hosting solutions on Cloudflare.
  • Knowledge and experience of Kotlin Multiplatform (KMP) is a plus.
  • Experience mentoring junior engineers.
  • Ability to be on call and respond to critical backend issues promptly.

Compensation Range: ¥8M - ¥14M