Job Description
At Zendesk, we’re on a mission to build the most advanced AI agents in CX, and the AI Agent Testing team within the AI Agents organization plays a critical role in ensuring those agents are reliable, robust, and ready to deliver real customer value. Our focus is on synthetic testing, evaluation workflows, validation frameworks, and tooling that help us measure quality, uncover failure modes, and ship with confidence.
As a Senior Fullstack Engineer on this team, you’ll be a key technical contributor shaping the systems, tooling, and workflows that power AI agent evaluation at scale. While this is a fullstack role, it leans more on backend development as we’re looking for someone who is deeply comfortable with APIs, event-driven systems, testing infrastructure, data workflows, and platform thinking, while also being able to design and deliver polished user-facing tools when needed.
You’ll collaborate closely with product managers, designers, data engineers, applied AI/ML partners, and fellow engineers to build internal and customer-facing capabilities that improve the quality of our AI agents. In this role, you’ll not only ship features end-to-end, but also help shape technical direction, raise the bar on engineering quality, and influence how the team solves complex problems.
Your work will directly impact how Zendesk validates and improves its AI agents, helping ensure our products are trustworthy, measurable, and effective.
Requirements
5+ years of experience building modern web applications using TypeScript, React, and Node.js.
Strong experience designing and building backend services, APIs, and event-driven systems.
We aim to make our hiring process clear and transparent:
Intro chat with Talent Partner – 30 minutes
Interview with Hiring Manager – 345 minutes
Technical stage is a theoretical interview + a live coding challenge – two times 60 minutes
Final interview with Hiring Manager and Senior Leadership – 45 minutes
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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 we’re 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 peopleandplaces@zendesk.com with your specific accommodation request.