About the Role
We're building a real-time voice AI product for live, natural conversations. This is a chance to work on a product where engineering quality is felt immediately by users. Every improvement to latency, reliability, and conversation flow makes the experience faster, smoother, and more human. We're looking for a Senior Full Stack Engineer who can own product features end to end, while bringing strong backend engineering fundamentals. This is a full stack role, but the center of gravity is backend: real-time systems, integrations, performance, and reliability.
What You'll Work On
- Build and improve the backend systems that power real-time voice conversations
- Develop integrations for telephony, real-time audio, and external AI services
- Ship product features across our voice platform, including user‑facing web experiences where needed
- Improve platform reliability, observability, and performance
- Work on real‑time interaction challenges like interruptions, responsiveness, turn‑taking, and conversation flow
- Collaborate closely with product and design to build voice experiences that feel polished and intuitive
Why This Role Is Exciting
- Real user impact: your work directly shapes how every conversation feels
- Interesting technical problems: low‑latency systems, real‑time interaction, and AI‑powered workflows
- Broad ownership: you'll contribute across product, platform, and infrastructure
- Strong opportunity: voice AI is still early, and you'll help define what great products in this space look like
We'd Love to Hear From You If You
- Have 3+ years of experience building production software
- Are a strong backend engineer first, with solid fundamentals in APIs, async systems, integrations, and system design
- Have experience building and owning product features end to end
- Have worked with real‑time or event‑driven systems such as WebSockets, WebRTC, streaming, or low‑latency APIs
- Care about product quality and enjoy solving user‑facing problems
- Are excited about voice AI, conversational products, or real‑time systems
Nice to Have
- Experience with React and TypeScript
- Experience building frontend product experiences
- Experience with Python and async backend architectures
- Experience with telephony, WebRTC, SIP, or audio/video systems
- Experience with LLMs, speech systems, or conversational AI
- Experience debugging performance or reliability issues in production
Tech Stack
Python, FastAPI, React, TypeScript, WebRTC, Redis, MongoDB, and modern LLM/speech infrastructure.
Compensation
The US annualized base salary range for this position is $145,000.00–$217,000.00. This position may also be eligible for bonus, benefits, or related incentives.
Equal Opportunity Employer
Zendesk is an equal opportunity employer, and we’re proud of our ongoing efforts to foster global diversity, equity, and inclusion in the workplace. Individuals seeking employment and employees at Zendesk are considered without regard to race, color, religion, national origin, age, sex, gender, gender identity, gender expression, sexual orientation, marital status, medical condition, ancestry, disability, military or veteran status, or any other characteristic protected by applicable law. We are an AA/EEO/Veterans/Disabled employer.
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