Software Engineer, Voice

Sierra Sierra · AI Frontier · San Francisco, CA · Engineering

Software Engineer role focused on building the infrastructure for AI-powered voice customer experiences, including accurate speech-to-text, natural speech synthesis, real-time audio processing for agentic loops, and scaling systems to handle millions of calls daily. The role also involves real-time integrations with telephony systems.

What you'd actually do

  1. How do we enable accurate speech-to-text and automatic speech recognition across 100s of languages? What infrastructure do we need to do this at low latency?
  2. How do we generate speech that is precise and matches each customer’s desired brand and style?
  3. How do we adapt our agentic loop to accept real-time streams of audio, instead of just text? How do we ensure we handle interruptions, disconnects, and transfers reliably?
  4. Build the infrastructure to enable Sierra to handle millions of calls a day.
  5. Build real-time integrations to telephony systems and call centers to enable Sierra to pick up the phone, and make outbound phone calls, reliably.

Skills

Required

  • 4+ years hands-on experience building production products and systems
  • Experience and comfort to build and ship full-stack solutions
  • Degree in Computer Science or related field, or equivalent professional experience

Nice to have

  • Experience building AI-powered products
  • Experience with Go and Typescript
  • Experience building developer tooling, programming languages, or databases
  • Leadership experience on technical projects or teams

What the JD emphasized

  • production products and systems
  • build and ship full-stack solutions
  • AI-powered products

Other signals

  • Speech-to-text
  • Speech generation
  • Real-time audio processing
  • Large-scale telephony integration