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, he was 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?

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.

What you'll bring

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.

Even better...

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.

Our values

Trust : We build trust with our customers with our accountability, empathy, quality, and responsiveness. We build trust in AI by making it more accessible, safe, and useful. We build trust with each other by showing up for each other professionally and personally, creating an environment that enables all of us to do our best work.

Customer Obsession : We deeply understand our customers’ business goals and relentlessly focus on driving outcomes, not just technical milestones. Everyone at the company knows and spends time with our customers. When our customer is having an issue, we drop everything and fix it.

Craftsmanship : We get the details right, from the words on the page to the system architecture. We have good taste. When we notice something isn’t right, we take the time to fix it. We are proud of the products we produce. We continuously self‑reflect to continuously self‑improve.

Intensity : We know we don’t have the luxury of patience. We play to win. We care about our product being the best, and when it isn’t, we fix it. When we fail, we talk about it openly and without blame so we succeed the next time.

Family : We know that balance and intensity are compatible, and we model it in our actions and processes. We are the best technology company for parents. We support and respect each other and celebrate each other’s personal and professional achievements.

What we offer

We want our benefits to reflect our values and offer the following to full‑time employees :

Flexible (Unlimited) Paid Time Off

Medical, Dental, and Vision benefits for you and your family

Life Insurance and Disability Benefits

Retirement Plan (e.g., 401K, pension) with Sierra match

Parental Leave

Fertility and family building benefits through Carrot

Lunch, as well as delicious snacks and coffee to keep you energized

Discretionary Benefit Stipend giving people the ability to spend where it matters most

Free alphorn lessons

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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