Sierra · 2 months ago
Software Engineer, Voice
San Francisco, CA
Full-time
Onsite
Mid Level
$200K/yr - $330K/yr
4+ years expSierra is a company focused on creating a platform that enhances customer experiences using AI. The Software Engineer, Voice role involves building infrastructure for speech recognition, synthesis, and telephony systems, aiming to handle millions of calls daily while ensuring high-quality user experiences.
Artificial Intelligence (AI)Enterprise SoftwareSaaS
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
Qualification
Required
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
Benefits
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
Company
Sierra
Sierra provides a platform that builds and manages conversational AI agents for customer experiences.
201-500 employees
H1B Sponsorship
Sierra has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (11)
2024 (2)
Funding
Current Stage
Growth StageTotal Funding
$635MKey Investors
SoftBank Vision FundGreenoaks
2025-12-04Series Unknown
2025-09-04Series Unknown· $350M
2024-10-28Series Unknown· $175M
Leadership Team
Bret Taylor
Co-Founder
Recent News
GlobeNewswire
2026-01-06
Company data provided by crunchbase