Full-Stack Engineer

**About the company:** monoya Shibuya-ku, Tokyo monoya is a well-funded startup on a mission to bring Japan’s best craftsmanship to the global stage. We’re reinventing how manufacturing companies grow, starting by digitizing the OEM workflow and enabling high-quality Japanese makers to access international markets with speed and scale, and vice versa. Read more **Responsibilities:** Build end-to-end features: schema → API → React UI, shipping to prod weekly. Integrate LLM-based workflows (chatbot, inquiry classification, content summarisation) using RAG and semantic search. Tune performance: Firestore query design, Cloud Run cold-start mitigation, bundle size optimisation. Strengthen CI/CD and IaC (Terraform modules, environment secrets). Mentor future hires; uphold code quality through reviews, tests, docs. Rotate across product surface areas—one sprint on buyer dashboard, the next on AI-powered search, etc. Requirements Have 2-3 yrs experience delivering production web apps. Are fluent in React and one or more of Python, Go, or Rust—and eager to learn the rest. Know your way around Docker, cloud-native patterns, and observability basics. Can reason about NoSQL data models, indexing, and trade-offs. Have tinkered with LLMs/RAG/semantic search (or are hungry to dive in fast). Enjoy small-team velocity, imperfect specs, and wearing multiple hats. Nice to haves While not specifically required, tell us if you have any of the following. Japanese ability Google Cloud experience (IAM, Cloud Run, Pub/Sub). Firebase Auth / Firestore security rules proficiency. Marketplace, payments, or logistics domain exposure. Mobile app or React Native experience. OSS contributions or tech blog posts we can read. Compensation ¥10,000,000 ~ ¥15,000,000 annually. Stock options available (negotiable) **Requirements:** Have 2-3 yrs experience delivering production web apps. Are fluent in React and one or more of Python, Go, or Rust—and eager to learn the rest. Know your way around Docker, cloud-native patterns, and observability basics. Can reason about NoSQL data models, indexing, and trade-offs. Have tinkered with LLMs/RAG/semantic search (or are hungry to dive in fast). Enjoy small-team velocity, imperfect specs, and wearing multiple hats. **Nice to have:** While not specifically required, tell us if you have any of the following. Japanese ability Google Cloud experience (IAM, Cloud Run, Pub/Sub). Firebase Auth / Firestore security rules proficiency. Marketplace, payments, or logistics domain exposure. Mobile app or React Native experience. OSS contributions or tech blog posts we can read. **Compensation:** ¥10,000,000 ~ ¥15,000,000 annually. Stock options available (negotiable)