Software Engineer II

Job Description

At Zendesk, we’re on a mission to build the most advanced AI agents in CX. The Testing team, part of AI Agents Advanced, focuses on ensuring the quality and reliability of our AI agents through synthetic testing, evaluation frameworks, and other validation approaches that help us ship with confidence. As a Fullstack Engineer on this team, you’ll be instrumental in building the systems and tools that power synthetic testing, evaluation, and quality validation for our AI agents.

While this is a fullstack role, it leans more on backend development, we’re looking for someone who is passionate about APIs, event-driven systems, testing infrastructure, and data workflows, while also being comfortable crafting user-facing tools and owning delivery end-to-end. You’ll work closely with product managers, designers, data engineers, data analysts, and fellow developers to create seamless, intuitive experiences – combining rich data, intelligent systems, and responsive UIs.

Your work will directly shape how our customers make informed and impactful decisions based on real-time, AI-powered insights.

• 3+ years of experience building modern web applications using Type Script, React, and Node.js.
• Familiarity with REST APIs, data fetching strategies, and integrating with external services.
• Write clean, modular, and tested code – and value maintainability as much as speed.
• Experience with design systems and component libraries, focusing on performance, accessibility, and usability.
• Product‑mindful engineering – care deeply about the end‑user experience and proactively contribute ideas to improve product outcomes.
• Excellent communication skills and a proactive mindset – collaborate well in cross‑functional teams, ask for help, and enable others.
• A drive for continuous learning, reflection, and improvement – for personal growth and the team’s success.
• A big plus if you are familiar with AWS and comfortable with CI/CD pipelines.
• Have a good understanding of microservice architecture, event‑driven systems and basic database design (relational and No
  
  SQL).
• Have experience using AI agentic tools such as Cursor, Claude Code, and similar developer assistants.
• Have working knowledge of Python and experience using it in backend, automation, or data‑related tasks.

You consistently deliver well‑scoped, high‑quality features across the stack, with guidance from senior team members when needed. You contribute to the reliability, maintainability, and performance of our systems through clean code, thoughtful testing, and attention to detail. You collaborate effectively across disciplines (product, design, AI/ML, data) and actively participate in team discussions and planning. You demonstrate ownership by following through on tasks, communicating blockers, and proactively seeking feedback to improve your work.

You show growth over time – deepening your technical skills, increasing your product understanding, and contributing more independently.

• Frontend:
  Type Script, React
• Backend:
  Node.js (ES7+), Type Script, Python, Mongo
  
  DB, Snowflake
• Infrastructure: AWS, Kubernetes, Terraform, ArgoCD, Sentry, Redis, Datadog, Git Hub Actions

• Intro chat with Talent Partner – up to 30 minutes.
• Interview with Hiring Manager – 30‑45 minutes.
• Technical stage: live coding challenge and interview with two engineers – 90 minutes.
• Final interview with Hiring Manager and Senior Leadership – 45 minutes.

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 .…