# Software Engineer, Agent Runtime at Sierra

- Company: Sierra
- What the company does: Sierra helps businesses build better, more human customer experiences with AI. Backed by Kleiner Perkins, Lightspeed and Sequoia.
- Company website: https://sierra.ai/
- Type: Startups (AI role)
- Level: Mid level
- Location: San Francisco, CA
- Work setup: On-site
- Pay: $230K to $390K base salary per year (USD)
- Posted: 2026-10-22
- Apply by: 2026-12-06
- Apply: https://jobs.ashbyhq.com/Sierra/0cb4da3e-3c67-4f14-a84d-956042669275?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/sierra-software-engineer-agent-runtime/

## About the role

Build the core systems that power agents. You’ll work on the Agent SDK — the orchestration engine, runtime, and primitives that define how agents reason, take actions, and interact with users and systems. Design the agentic loop. What primitives do we need to build agents that are steerable and verifiable, while still conversational and adaptive? You’ll help define how agents operate in real-world environments. Found on 1752vc Careers, the job board for startup and VC roles.

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/sierra-software-engineer-agent-runtime/