Software Engineer, Voice Quality

About Us

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, and Singapore.

We are guided by a set of values that are at the core of our actions and define our culture : Trust, Customer Obsession, Craftsmanship, Intensity, and Family. These values are the foundation of our work, and we are committed to upholding them in everything we do.

Our co‑founders are Bret Taylor and Clay Bavor. Bret currently serves as Board Chair of OpenAI, previously co‑CEO of Salesforce (which had acquired the company he founded, Quip) and CTO of Facebook. Bret was also one of Google’s earliest product managers and co‑creator of Google Maps. Before founding Sierra, Clay spent 18 years at Google, where he most recently led Google Labs. Earlier, he started and led Google’s AR / VR effort, Project Starline, and Google Lens. Before that, Clay led the product and design teams for Google Workspace.

What You’ll Do

Sierra’s engineering team has ~40 mostly senior engineers, including Mihai, Belinda, Arya, and Wei. We work in small, autonomous teams oriented around customer problems. Here are some examples of what you’ll work on :

• 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?

What You’ll Bring

Even better...

Our values

What We Offer

These benefits are further detailed in Sierra's policies and are subject to change at any time, consistent with the terms of any applicable compensation or benefits plans. Eligible full‑time employees can participate in Sierra's equity plans subject to the terms of the applicable plans and policies.

Be you, with us

We're working to bring the transformative power of AI to every organization in the world. To do so, it is important to us that the diversity of our employees represents the diversity of our customers. We believe that our work and culture are better when we encourage, support, and respect different skills and experiences represented within our team. We encourage you to apply even if your experience doesn't precisely match the job description. We strive to evaluate all applicants consistently without regard to race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class.

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