Founding Product Engineer
About the Role
Join an early-stage consumer AI company as its founding product engineer, owning the agent and the end-to-end user experience. You will shape how the assistant makes decisions, communicates, and takes action, while working hands-on across product engineering, prompts, and evaluation systems.
What You'll Do
Build the agent decision-making layer, including tool-calling loops, memory, context assembly, prompt engineering, and model routing.
Create evaluation infrastructure with conversation replay, turn-level judging, and regression suites to guide release decisions.
Own mobile and web product experiences, from onboarding and first interactions through ongoing use, group conversations, approvals, and trusted connections.
Ship features end to end, using experimentation and feature flags to measure their impact.
Develop integrations with email, calendars, bookings, payments, and browser automation, including OAuth and spending approval flows.
Review conversations and speak with users regularly to inform product decisions.
Establish engineering standards and help grow the team.
