Senior Product Engineer (AI, Full-Stack)

Seattle, Remote. Posted 2 months ago

The role

You will own client demos from schema to pixel, including deployment and observability. You will build chat surfaces, agent workspaces, and the app builder while working across the full stack.

What you will do

Build and evolve the chat surface and agent workspaces
Partner with the platform team on the app builder
Maintain the component and design system
Build the agent-facing developer experience
Own the full stack behind features including TypeScript front end, Node/FastAPI backend-for-frontend, and Postgres schema
Ship enterprise readiness features like accessibility, localization, and audit trails
Work down the stack to debug across product, backend, and platform teams

Required qualifications

5+ years of deep, production experience with React/TypeScript
Hands-on experience with a streaming protocol end to end (SSE or WebSocket)
True full-stack ownership including Node/Fastify or Python/FastAPI
Product taste backed by enterprise experience
AI-native working style using AI coding tools
Strong sense of ownership including instrumentation, evals, cost awareness, and on-call
Practical depth in TypeScript (strict), React 19, TanStack Query, Vite, Node/Fastify or Python/FastAPI, Postgres/Redis, and SSE/WebSocket streaming
Familiarity with zod-validated wire contracts, sandboxed iframes/CSP/postMessage, Playwright/Vitest, WCAG 2.2 AA, i18n frameworks, and OIDC/OAuth2 session mechanics
Bachelor's Degree

Nice to have

Master's is a plus

Benefits

Competitive early-stage startup compensation
Bonus eligibility
Health insurance with meaningful coverage for dependents
Flexible paid time off
Equity

Before you apply

Must be able to travel 2x/year for company summits
Applicants must be currently authorized to work in the United States on a full-time basis
Unable to sponsor or take over sponsorship of employment visas
Interview process includes a written take-home assignment followed by a live two-hour technical session
Please only apply to a maximum of 2 roles at a time

About the company

AZX specializes in physics-informed ML and enterprise AI solutions for climate and sustainability challenges. They work with leaders in real estate, energy, logistics, and utilities.