Senior Platform Engineer

HRBaires; San Francisco (CA); Vor Ort; USD 180.000 - 240.000; Vollzeit

Zusammenfassung

HRBaires is seeking a Mid-Senior Backend Engineer to build and own the core execution engine (agent runtime) that manages session state, tool calls, and long-running processes. You will work with TypeScript, Cloudflare Workers, and Postgres in a high-availability environment.

Ideal candidates will have production experience with backend systems, strong TypeScript coding skills, and willingness to relocate to the San Francisco Bay Area.

Qualifikationen

• Production backend experience
• Experience writing production backend code in TypeScript
• Based in or willing to relocate to the San Francisco Bay Area

Aufgaben

• Build and own the core execution engine (agent runtime) that manages session state and tool calls
• Oversee long-running processes and ensure reliability across sessions
• Collaborate with cross-functional teams to deploy and operate distributed systems

Kenntnisse

Production experience

Distributed systems

TypeScript

English

Agents

PostgreSQL

Cloudflare Workers

Docker

Cloudflare

Tools

Docker

PostgreSQL

Cloudflare Workers

Cloudflare

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)

Skills: production experience,building,distribute systems,typescript,docker,english,agents,postgresql,cloudfare workers,cloudflare