Senior Full Stack Engineer, Solve Voice

Join us at Zendesk where were on a mission to power exceptional service for every person on the planet. Were accelerating that ambition by building products rooted in AI automation and intelligent customer experiences because behind every interaction lies an opportunity to make a human connection.

Were seeking a Senior Full Stack Engineer to build the real-time voice AI product that makes live conversations feel natural and reliable. Your work will reduce latency improve conversation flow and make voice interactions an effective channel for AI-driven support.

• Design and implement backend services powering real-time voice conversations focusing on latency reliability and observability.

• Build integrations for telephony WebRTC real-time audio processing and external AI/speech services.

• Ship end-to-end product features across backend systems and user-facing web experiences when required.

• Improve platform reliability and performance: monitoring tracing autoscaling and failure recovery.

• Address real-time interaction challenges such as turn-taking interruptions responsiveness and graceful handoff to humans.

• Partner with product and design to deliver voice experiences that feel polished and human.

What you bring to the role

• Solid backend fundamentals with experience designing APIs async systems and scalable integrations.

• Hands-on experience with real-time systems (WebRTC WebSockets) or telephony protocols.

• Product-driven engineering mindset you ship user-facing features and care about UX quality.

• Ability to debug and optimize latency and reliability issues in production systems.

• Enjoys cross-functional collaboration with product design and ML/speech teams.

Basic qualifications

• 3 years building production software with significant backend engineering experience.

• Experience with real-time or event-driven systems (WebRTC SIP streaming APIs).

• Proficiency in Python or equivalent backend languages and async architectures.

Preferred qualifications

• Experience with telephony stacks SIP media servers or speech/ASR/TTS integrations.

• Familiarity with LLMs speech models or conversational AI production infrastructure.

• Experience on fullstack teams shipping both backend and frontend user experiences.

• Expertise in diagnosing performance and reliability issues under real-time constraints.

The intelligent heart of customer experience

Zendesk software was built to bring a sense of calm to the chaotic world of customer service. Today we power billions of conversations with brands you know and love.

Zendesk believes in offering our people a fulfilling and inclusive experience. Our hybrid way of working enables us to purposefully come together in person at one of our many Zendesk offices around the world to connect collaborate and learn whilst also giving our people the flexibility to work remotely for part of the week.

As part of our commitment to fairness and transparency we inform all applicants that artificial intelligence (AI) or automated decision systems may be used to screen or evaluate applications for this position in accordance with Company guidelines and applicable law.

Zendesk is an equal opportunity employer and were proud of our ongoing efforts to foster global diversity equity & 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. If you are based in the United States and would like more information about your EEO rights under the law please click here.

Zendesk endeavors to make reasonable accommodations for applicants with disabilities and disabled veterans pursuant to applicable federal and state law. If you are an individual with a disability and require a reasonable accommodation to submit this application complete any pre-employment testing or otherwise participate in the employee selection process please send an e-mail to with your specific accommodation request.