# Software Engineer, Payments Infrastructure 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/50ec6f9a-25f9-44b4-b8cc-50c897e698b3?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/sierra-software-engineer-payments-infrastructure/

## About the role

The agent must collect and use a card number but can never see it. This work sits across four hard technical domains: payments, security, real-time voice, and LLMs. Voice is the core challenge. A caller speaks or types a card number in a live, low-latency audio stream, and the digits must never reach the model, while the model stays on the call. 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-payments-infrastructure/