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Senior Product Engineer

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Senior Product Engineer in USA

  • Seattle, WA

Responsibilities

  • Build and evolve streaming chat surfaces and agent workspaces, including persistence, tool-call and approval experiences, and citation rendering.
  • Partner with the platform team on the app builder, generated toolchain, preview sandbox, and generation/repair-loop user experience.
  • Maintain shared components and the design system across chat, workspaces, and the app builder.
  • Build agent-facing developer experience including the CLI, deployment tooling, and manifests.
  • Own the full stack of features across TypeScript, Node/FastAPI, Postgres, deployment, observability, and on-call.
  • Implement enterprise readiness through accessibility, localization, and audit trails.
  • Debug across product, backend, and platform boundaries using service traces and Kubernetes logs.

Requirements

  • At least 5 years of deep, production experience with React and TypeScript, including streaming UIs, high-frequency updates, virtualization, state management, and hands-on React 19 knowledge.
  • End-to-end experience with SSE or WebSocket streaming, including chunk boundaries, reconnection, abort propagation, and raw byte-stream debugging.
  • Experience shipping backend services for personal front ends using Node/Fastify or Python/FastAPI, including authentication, idempotency, pagination, race conditions, and migrations.
  • Product and enterprise experience with defensible accessibility, thoughtful empty and error states, and localization beyond a strings file.
  • Daily use of AI coding tools with examples of overriding tool output and a specification-driven development approach.
  • Experience with instrumentation, evaluations of AI-dependent behavior, cost awareness, and on-call ownership.
  • Practical depth with TypeScript, 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 required; master's degree is a plus.
  • Must be authorized to work full-time in the United States without current or future visa sponsorship.

Benefits

  • Competitive early-stage startup compensation based on capabilities, experience, and location.
  • Bonus eligibility and equity.
  • Health insurance with meaningful dependent coverage.
  • Flexible paid time off.
  • Fully remote culture with a cluster of teammates in Seattle.
  • Travel to company summits twice per year is required.

Salary: $140k - $225k/yr

AZX

Tech transformation, societal shifts and environmental disruption put enormous pressure on critical industries like energy, infrastructure, real estate and others to adapt, pursue new growth opportunities and optimize operations. AZX was created to meet these challenges head-on. We deliver AI tra...

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