Senior Platform Engineer: Agent Runtime & Stateful Backend

HRBaires; California; On-site; USD 180,000 - 240,000; Full time

Job summary

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.

Qualifications

• 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.

Responsibilities

• 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.

Skills

Backend experience

TypeScript

Distributed systems

Tools

Cloudflare Workers

Durable Objects

Postgres

Docker

Job description

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.