Senior Software Engineer

Job Description Senior Frontend Engineer Zendesk is founded by Danish entrepreneurs and dedicated to helping customers build great relationships through well-designed, reliable software. Our Copenhagen office is part of a growing team focused on the next-generation AI-powered features delivering the world’s best customer service and knowledge management experiences. We promote a fun, inclusive, and collaborative culture where innovation and empathy guide our work. Position Overview We are seeking a skilled Frontend Engineer to join our Knowledge team in Copenhagen, working alongside backend engineers, ML scientists, and product teams. You will help build and enhance customer-facing knowledge management solutions powered by AI and advanced data technologies. Our frontend stack is built with modern JavaScript and TypeScript, leveraging React for rich, dynamic user experiences. Your work will directly enhance how customers interact with our Help Center and related content services by building robust frontend experiences that integrate AI features and maintain high reliability and responsiveness. What You’ll Do Develop, maintain, and improve frontend features using React and JavaScript/TypeScript within a complex, service-oriented architecture. Partner with ML scientists and product teams to implement AI-powered capabilities on the frontend. Lead the technical design, architecture, and long-term roadmap for major user-facing features and frontend systems. Actively drive improvements to the team's engineering best practices, development workflows, and tooling (e.g., CI/CD, testing methodologies, component libraries). Own the end-to-end operational stability, reliability, and monitoring of production frontend applications, including complex integrations with backend services at Zendesk scale. Communicate clearly with team members and stakeholders about design choices, implementation plans, and technical challenges. What You’ll Bring 5+ years of demonstrated professional experience in frontend engineering, with strong proficiency in React and JavaScript/TypeScript. Demonstrated ability to design, build, and operate complex, distributed frontend systems (e.g., micro-frontends, shared services, high-traffic applications). Expertise in frontend-specific performance testing, capacity planning, and optimization (e.g., minimizing operational costs, reducing load times, and managing client-side resources for large-scale applications). Experience working in agile teams with modern development workflows including code reviews, testing, and CI/CD. Familiarity with backend technologies (Ruby on Rails, Node.js) and REST/GraphQL APIs, enabling effective cross-team collaboration. Experience working with AI-related frontend features or integrations is a strong plus. Good problem-solving skills and customer-centric mindset with a focus on usability and accessibility. Strong communication skills in English, both written and spoken. Proven experience and effectiveness in formally mentoring junior and mid-level engineers, leading code reviews, and elevating the technical standards of a team. Preferred Qualifications Bachelor’s or Master’s degree in Computer Science or related field. Experience with event-driven architectures, content management systems, or cloud deployment technologies (Docker, Kubernetes, AWS). Exposure to observability tools to monitor frontend reliability and performance. Previous experience working in AI or LLM feature implementation on the frontend. Our Tech Stack Frontend: React, JavaScript, TypeScript Backend: Ruby on Rails, Node.js, GraphQL, REST Infrastructure: AWS, Kubernetes, Docker Data: MySQL, Redis, ElasticSearch, Aurora, S3 Work Location Copenhagen, Denmark – Join a passionate team growing the AI-powered product suite in the heart of Zendesk’s roots. 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 [email protected] with your specific accommodation request.