Founding Product Engineer
About the Role
Join an early-stage consumer AI company as its founding product engineer, with ownership of an AI assistant and its end-to-end user experience. You will work across agent behavior, product interfaces, and evaluation systems to help make everyday tasks easier for users.
What You'll Do
Build the agent decision-making layer, including tool-calling loops, memory, context assembly, prompt design, and model routing.
Create evaluation infrastructure with conversation replay, turn-level assessments, and regression suites to guide release decisions.
Own product experiences across mobile and web, from onboarding and initial interactions to ongoing use, group conversations, approvals, and trusted networks.
Ship features end to end, using experimentation and feature flags to measure outcomes and improve the product.
Develop integrations with email, calendars, bookings, payments, and browser automation, including reliable tool-use and user-approval flows.
Review conversations, speak with users regularly, and use feedback and product data to prioritize improvements.
Set engineering standards and help grow the team while remaining han
