Founding AI Product Engineer — Shape a Next‑Gen Assistant

Wwshemi; San Francisco (CA); On-site; USD 200,000 - 300,000; Full time

Job summary

Wwshemi in San Francisco is seeking a founding product engineer to own an AI assistant end-to-end, shaping its reasoning, communication, and actions across web and mobile. You will blend hands-on engineering with close product collaboration and regular user feedback to deliver impactful experiences.

You’ll help design agent architecture, implement tool-use loops, and define engineering standards as the team grows, driving features from discovery to launch with a strong product focus.

Qualifications

• At least 4 years of software engineering experience in an AI product company, AI lab, or consumer product company.
• Experience building agents with tool use, memory, and long‑running conversations, plus evaluation systems trusted for release decisions.
• Full‑stack experience with TypeScript, React, Next.js, and Postgres.
• Experience with third‑party APIs, OAuth, payments, or agent tooling such as function calling, MCP servers, or browser automation.
• A record of owning features end to end and demonstrating measurable product impact.
• Experience leading a growing engineering team while remaining hands‑on; post‑training or fine‑tuning experience is a plus.

Responsibilities

• Build the assistant’s agent architecture, including tool‑use loops, memory, context assembly, prompt design, and model routing.
• Create evaluation systems with conversation replay, turn‑level assessment, and regression tests to guide release decisions.
• Own product experiences across web and mobile, including onboarding, follow‑ups, group conversations, approvals, and trusted‑network features.
• Ship features from discovery through experimentation and launch, using user feedback and product data to guide iteration.
• Develop integrations with services such as email, calendars, bookings, and payments, along with reliable approval and recovery flows.
• Review conversation transcripts, speak with users, and help set engineering standards as the team grows.

Skills

TypeScript

React

Next.js

PostgreSQL

Job description

Wwshemi in San Francisco is seeking a founding product engineer to own an AI assistant end-to-end, shaping its reasoning, communication, and actions across web and mobile. You will blend hands-on engineering with close product collaboration and regular user feedback to deliver impactful experiences.

You’ll help design agent architecture, implement tool-use loops, and define engineering standards as the team grows, driving features from discovery to launch with a strong product focus.