Software Engineer II (Fullstack), AI Copilot

Job Description At Zendesk, our focus is helping our customers build great relationships with their customers. Founded by three Danish entrepreneurs, Zendesk has experienced remarkable success and growth while maintaining a fun, positive, and down-to-earth culture. We are looking for a Software Engineer II (Fullstack) to join our AI Copilot organisation. AI Copilot is a multi-million ARR product that puts AI directly into the hands of customer service agents and administrators. You will be part of a cross-functional team delivering AI-powered product features at Zendesk scale. We ship to learn: our philosophy is to deliver early, deliver often, and iterate based on real-world customer feedback. This is a great environment for engineers who want to grow their skills while shipping meaningful work. What you'll be doing Deliver product features end-to-end — from frontend UI through backend services, testing, and release — with support and guidance from senior engineers. Build and maintain React/TypeScript user interfaces for AI-powered conversational experiences. Build and maintain backend services, APIs, and integrations that power the product. Work within a cross-functional team alongside ML engineers and scientists to build and maintain AI-powered product experiences. Write clean, well-tested, and maintainable code across the stack in a fast-paced delivery environment. Participate in technical design discussions, learning to break down problems and make sound technical decisions. Contribute to improving the reliability and performance of the systems your team owns. Grow your skills through code review, pairing with more experienced engineers, and engaging with new technologies including ML and LLMs. What you bring to the role Required 2-4 years of professional experience building web applications. Experience with at least one modern web framework or language (e.g., React, Ruby, Python, TypeScript) — we care more about your ability to pick up new tools than which ones you already know. Solid understanding of software engineering fundamentals: data structures, algorithms, design patterns, and testing practices. Experience with RESTful APIs and relational databases (e.g., MySQL, PostgreSQL). Familiarity with cloud infrastructure (AWS) and containerisation (Docker) — you've deployed services beyond your local machine. A bias for delivery — you care about getting features into users' hands, not just writing code. Curiosity and willingness to learn across disciplines, including ML and AI technologies. Strong collaboration skills and a team-first mindset. Preferred Experience with both React/TypeScript and Ruby or Python. Experience with real-time communication patterns (SSE, WebSockets, streaming APIs). Experience with Kubernetes and CI/CD pipelines. Interest in or exposure to LLMs, prompt engineering, or AI/ML tooling. Experience with event-driven architectures (e.g., Kafka). Familiarity with agile development practices and iterative delivery. Tech Stack Frontend: React, TypeScript Backend: Ruby, Python Infrastructure: AWS, Kubernetes, Docker Data: S3, RDS MySQL, Snowflake (with dbt for transformations) ML pipelines: Metaflow Heavy usage of LLM technology from multiple providers #LI-AO1 Hybrid: In this role, our hybrid experience is designed at the team level to give you a rich onsite experience packed with connection, collaboration, learning, and celebration - while also giving you flexibility to work remotely for part of the week. This role must attend our local office for part of the week. The specific in-office schedule is to be determined by the hiring manager. 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 ... (truncated, view full listing at source)