Software Engineer, Voice

Sierra
San Francisco, USA / Atlanta, USA / New York, USA2025-11-14OnSite

About the job

At Sierra, we’re creating a platform to help businesses build better, more human customer experiences with AI. We are primarily an in-person company based in San Francisco, with growing offices in Atlanta, New York, London, Paris, Madrid, Munich, Singapore, Japan, and Sydney.

Responsibilities

Transcription: 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?

Synthesis: How do we generate speech that is precise and matches each customer’s desired brand and style?

Runtime: 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?

Scaling: Build the infrastructure to enable Sierra to handle millions of calls a day.

Telephony: Build real-time integrations to telephony systems and call centers to enable Sierra to pick up the phone, and make outbound phone calls, reliably.

Qualifications

Minimum

A passion for being on the frontier of AI products.

Motivation and high-agency to drive outcomes - we have a high-autonomy culture and each team member has lots of agency to overcome obstacles and achieve customer impact.

Alignment to our company values throughout your work, notably finding a balance between Craftsmanship, Customer Obsession, and Competitive Intensity.

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.

Preferred

Experience building AI-powered products.

A sharp eye for design.

Experience with Go and Typescript.

Experience building developer tooling, programming languages, or databases.

Leadership experience on technical projects or teams.