Founding Senior Software Engineer (Backend)

Retell AI· San Carlos, CA, US

Posted October 31, 2026

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Experience
3+ years
Pay
$215K – $290K per year
Education
Degree in CS, CE, or EE
Location
San Carlos, CA, US
Work mode
On-site
Job type
Full-time

About this role

Retell AI builds voice AI agents that automate sales, support and retention calls for call centers. This founding backend role shapes the core systems behind millions of AI-driven conversations, including real-time audio and telephony.

What you will do

  • Build core platform architecture such as prompt orchestration and testing frameworks
  • Build observability dashboards and telephony integrations
  • Design scalable backend systems and DevOps workflows
  • Lead complex projects from architecture to production
  • Create intuitive APIs for quick customer onboarding
  • Support customer onboarding and turn feedback into improvements

What the employer expects

  • 2+ years of backend development experience
  • Degree in CS, CE, or EE
  • Founder-like ownership mindset
  • Startup experience or adaptability
  • Cloud infra/DevOps knowledge is a plus

Benefits

  • 100% medical, dental and vision coverage
  • $70/day DoorDash meal credit
  • $200/month wellness reimbursement
  • $300/month commuter reimbursement
  • $75/month phone reimbursement
  • $50/month internet reimbursement
  • Equity of 0.25% - 0.45%
  • Visa sponsorship

Skills

  • JavaScript
  • Node.js
  • TypeScript
  • Python
  • DynamoDB
  • PostgreSQL
  • AWS

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