# Research Engineer, Applied Research 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
- Posted: 2026-10-05
- Apply by: 2026-11-19
- Apply: https://jobs.ashbyhq.com/sierra/ddae4a0c-2f6c-4cc3-80aa-da74a0dd667a?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/sierra-research-engineer-applied-research/

## About the role

Tackle unsolved applied AI and ML problems. Pushing the boundaries of post-training, voice AI, and long-horizon task execution, building agents that can reason, adapt, and reliably carry out complex tasks for customers. Determine when to build specialized models and when to use externally provided frontier intelligence, balancing quality, speed, and cost to deliver customer value. Found on 1752vc Careers, the job board for startup and VC roles.

Tags: Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/sierra-research-engineer-applied-research/