Full Stack Engineer (Future Tech Lead Path)

We’re Hiring: Full Stack Engineer (Future Tech Lead Path)

Location: Tokyo, Japan

Language Requirement: You're Japanese doesn't have to be perfect, but you should be able to do non-technical interviews in Japanese. For reference High JLPT N3/N2. (Certificate not required)

We’re looking for a Full Stack Engineer who wants to build great products, grow into a leadership role, and help shape the future of our platform, our engineering team/culture, and our company.

We welcome developers with experience in any language—Java, Go, Python, PHP, etc. As long as you’re excited to work in our stack (Next.js/TypeScript and Rails/Vue.js) and willing to learn, you’re a fit.

We’re hiring for multiple positions!

What You’ll Work On

• Our product, KATIX, is currently focused on helping people sell bikes and cars, but we’re actively working to expand into new verticals.
• The bike platform is built with Ruby on Rails, Vue.js, and Node.js
• The car platform uses Next.js and TypeScript
• Both systems are containerized with Docker and deployed to AWS. As a full stack engineer, you’ll join one of these teams and help us scale.

What You’ll Do

• Build web frontends using Vue.js or Next.js
• Build backend APIs using Ruby on Rails or Node.js
• Support DevOps (CI/CD with GitHub Actions, ECS, ECR, Load Balancers, Monitoring, etc.)

What We’re Looking For

Minimum:

• 2+ years of full stack web development experience (any language)
• Able to interview in Japanese
• You’ll either work in English or Japanese depending on your level, but passing the interview in Japanese is required
• Experience working in a team based environment for more than 1 year (3+ members)

Bonus Points:

• 5+ years of professional experience
• Experience with Rails, TypeScript, Next.js, or Vue.js
• JLPT N1 or native-level fluency
• Experience as a Tech Lead
• Experience working in Scrum teams

Why Apply?

• You’ll ship real features from day one
• You’ll have the opportunity to grow into a leadership role
• We have a modern stack, a product-driven culture, and a young engineering team where your voice matters
• We’re actively growing both the engineering team (2X) and the company (3X) and expanding to new markets

Ready to Apply?

No need for a perfect resume or cover letter. If you’re curious, passionate about product development, and ready to grow—just apply. We’d love to hear from you.

p.s. I will personally handhold every qualified individual through our interview process. My assumption is eveyrone who applies will have a decent amount of skill as a software engineer. So because we're looking for 'potential tech leads', what you'll effectively be measured against then is how well you can communicate with others.