Senior Platform Engineer

HRBaires; California; Vor Ort; USD 180.000 - 240.000; Vollzeit

Zusammenfassung

HRBaires is seeking a Mid-Senior Backend Engineer in San Francisco, on-site, to own the core execution engine that powers AI agent sessions. You will work with TypeScript, Cloudflare Workers, and distributed systems to ensure reliable long-running processes.

The role requires production backend experience with TypeScript, and being based in the San Francisco Bay Area or willing to relocate. This is a full-time, on-site position offering a competitive salary and growth opportunities.

Qualifikationen

• Production experience building and operating stateful backend systems.
• Professional experience writing production backend code in TypeScript.
• Based in the San Francisco Bay Area, or willing to relocate.

Aufgaben

• Own the core execution engine (agent runtime) that manages session state and tool calls.
• Build reliable backend systems for long-running AI agent sessions.
• Collaborate with frontend and platform teams to ensure robustness and scalability.

Kenntnisse

Backend experience

TypeScript

Distributed systems

Tools

Cloudflare Workers

Durable Objects

Postgres

Docker

Jobbeschreibung

Location: San Francisco, CA (On-site, 5 days/week)

Employment: Full-time

Seniority: Mid-Senior Level

Salary: $180,000 — $240,000

Visa: US work authorization required.

About the company

Y Combinator-backed, early-stage AI startup (~15 people) building a hybrid AI and software platform centered on a shared context engine.

The role

You’ll build and own the core execution engine (agent runtime) that manages session state, tool calls, and long-running processes — the backbone that lets AI agents operate reliably over extended sessions.

Core stack: TypeScript, Cloudflare Workers, Durable Objects, Postgres, Docker, Distributed Systems

Required

• Production experience building and operating stateful backend systems — work that outlasts the initial request
• Professional experience writing production backend code in TypeScript
• Based in the San Francisco Bay Area, or willing to relocate

Nice to have

• Experience building an agent runtime or agent harness
• Production experience with Cloudflare Workers, Durable Objects, or other actor-based runtimes
• Experience deploying long-running processes that persist across code releases
• Background at next-gen AI/agentic companies or design-first product orgs

Interview process

• Application review (resume short questions)
• 15-min intro call
• 45-min technical interview
• System design interview
• Paid work trial (~5 days)

.