Founding Product Engineer
Core
Build the agent decision-making layer, user experience end-to-end, and evaluation infrastructure for an early-stage personal AI assistant.
Role type
Founding Product Engineer (AI Agents)
Builds
Personal AI assistant agent, mobile and web product experiences, integrations with email/calendar/payment tools
Domain
Consumer AI / Personal Assistant
Deliverable
production ML models
Required skills
TypeScript, React, Next.js, PostgreSQL, agent tooling (function calling, MCP servers, browser automation), third-party API integrations, OAuth, payments, evaluation systems, experimentation/feature flags
Preferred skills
Post-training or fine-tuning experience
Technologies
TypeScript, React, Next.js, PostgreSQL
Responsibilities
Build agent decision-making layer including tool-calling loops, memory, context assembly, prompts, and model routing; Create evaluation infrastructure with conversation replay, turn-level judges, and regression suites; Own product experiences across mobile and web including onboarding, replies, group chats, and trusted-network features; Build integrations with email, calendar, booking, payment, and browser tools; Review conversation transcripts and use feedback to guide priorities; Set engineering standards and grow the team