—Career
Challenge AI Learning Coach
Shipped one of Japan's first production EdTech generative-AI products bug-free in 7 months
01Overview
A generative-AI chat product for students in grades 4–9. I built the Java backend API end-to-end on my own — from requirements to load testing (request shaping, usage limits, logging, master data). It shipped bug-free over 7 months with a 3-person team and launched nationwide in March 2024 (with a national TV campaign). I supported the AI platform side with prompt design and evaluation tooling.
02Highlights
- Nationwide launch in March 2024 (national TV campaign)
- One of Japan's first production EdTech generative-AI products
- Built the Java backend API solo from requirements to load testing; bug-free launch with a 3-person team over 7 months
03Tech Stack
04Related Projects
Shinkenzemi √Route
Founded a 0-to-1 online learning platform for high schoolers, growing from a solo prototype to PM & Tech Lead of a 26-person team.
Educational Content Pipeline
Solo-built an LLM pipeline that structures educational content, reporting directly to the CIO — 20,000+ questions linked to exam data problem-by-problem.