AI / Machine Learning Engineer at Monoya

Monoya, a well-funded Tokyo startup reinventing how manufacturing companies grow internationally, is hiring an AI/Machine Learning Engineer. The role focuses on LLM-powered agents — designing and deploying multi-modal, tool-using agents that classify inquiries, ask clarifying questions, and draft estimates using RAG pipelines and function-calling. You will build and tune vector search and knowledge graphs over Firestore + Weaviate, establish repeatable benchmarks and evaluation metrics, and convert PoCs to clean tested services on Cloud Run.

Requirements:

2-3 years building ML or data-intensive systems

Clean Python proficiency

Fluency in at least one deep-learning framework (PyTorch preferred)

Shipped experience with modern LLM tooling (OpenAI, Ollama, vLLM, Hugging Face, LangChain, LiteLLM)

Tech stack: OpenAI, Ollama, LangChain, Firestore, Weaviate, Python FastAPI, Cloud Run, Docker, GitHub Actions, Terraform.

Location: Tokyo, Japan (hybrid)