About the role
Mellow is designed to think with you, not for you. We're looking for an engineer to help build the intelligence that makes that possible — the workflows, retrieval systems, and context modeling that let Mellow understand users over time.
You'll work closely with Ben on the backend systems and AI logic that bring memory, reasoning, and awareness to life. You'll move fast, test ideas in production, and help define how Mellow "thinks."
What you'll do
- Design and implement workflows using the OpenAI Agents SDK
- Build semantic search and retrieval systems in Supabase and Postgres
- Prototype chunking, memory, and action orchestration logic
- Evaluate and refine performance using real user data
- Contribute to Mellow's AI architecture and developer tooling
What we're looking for
- Proficiency in TypeScript and/or Python
- Understanding of embeddings, retrieval, or agent frameworks
- Comfort with async workflows and modern backend stacks
- Curiosity about how AI can enhance daily human behavior
- Ability to move quickly, learn independently, and ship experiments
Nice to have
- Experience with OpenAI Agents SDK, LangChain, or vector databases
- Prior work in consumer AI or applied reasoning systems
What you'll get
- Ground-level ownership in a consumer AI company
- Exposure to real-world reasoning systems at scale
- Creative input on how Mellow evolves
- A direct role in building the intelligence behind an AI that feels human