Senior Fullstack Engineer, Solve

Job Description

About the Role

Were 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. Were 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 Youll 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: youll contribute across product platform and infrastructure

Strong opportunity: voice AI is still early and youll help define what great products in this space look like

Wed 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.

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.

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