Member of Technical Staff - App Engineer

You will take products from concept to production.

This is a hands-on building role. Product direction is shaped with the founders; your job is to turn that direction into software people in Japan want to use.

You will work across product design, frontend, backend integration, and deployment. Once something ships, you will stay close to it—learning from users, improving the experience, and shipping continuously.

Our development workflow is AI-native. AI writes a meaningful portion of the code, and we expect you to use it aggressively to move faster. What we cannot hand to a model is judgment: what to build, how it should feel, whether the architecture makes sense, and whether the final result is actually good.

That requires technical depth. You do not need to be the strongest low-level engineer in the room, but you do need to understand the stack and current AI models well enough to direct the work, maintain sound architecture, and catch subtle problems before users do.