Senior Backend Engineer / Technical Lead

• 12 August 2026 • 100% • Indefinite duration • Lausanne Senior Backend Engineer / Technical Lead • Full time • Department: Diagnostics • Dept: Diagnostics • Division: Engineering Company Description Nexthink is the leader in employee digital experience management software. The company offers IT managers unprecedented visibility, allowing them to see, diagnose, and resolve large-scale problems affecting employees everywhere, with any application or network, before employees notice the problem. As the first solution enabling IT to move from reactive problem solving to proactive optimization, Nexthink enables its more than 1,500 customers to offer better digital experiences to more than 25 million employees. Having two headquarters in Lausanne, Switzerland, and Boston, Massachusetts, Nexthink has 9 offices worldwide. Job Description We are looking for an experienced Senior Backend Engineer / Technical Lead to design and build scalable, reliable, and high-performance backend systems for Nexthink Assist, our AI-native product. You will integrate new features into Assist and customize and improve the workspace experience that is at its center. You will develop services and core infrastructure supporting large-scale data processing, real-time interactions, and integrations between multiple systems. This highly collaborative role requires clear communication, solid technical judgment, and the ability to work effectively across teams. You will be responsible for important backend components end-to-end, define technical direction, and manage inter-team decisions and disagreements with minimal supervision. Responsibilities Design, build, and evolve distributed backend systems serving millions of users. Ensure complete feature delivery: from design, implementation, deployment, and monitoring. Architect real-time and low-latency backend APIs and services for AI-driven conversational systems within Assist. Develop cloud-native services in Java, ensuring reliability, performance, and scalability. Work on infrastructure components, including AWS-based deployments, containerization (Docker), and orchestration (Kubernetes/ECS). Build robust APIs and backend services that power AI-driven products and real-time interactions. Ensure resilience, fault tolerance, and compliance in high-throughput environments. Collaborate with product managers, infrastructure engineers, and other teams to deliver production-ready systems. Contribute to technical discussions, share knowledge, and help evolve best practices in backend engineering and infrastructure. Qualifications More than 8 years of professional experience in backend engineering. Proficiency in modern Java (17+). Proven experience in designing and scaling backend systems for millions of users or high-throughput real-time services. Good understanding of cloud-native architectures (AWS or similar), containerization (Docker), and orchestration (Kubernetes/ECS). Experience with distributed data systems (e.g., Redis, Apache Kafka). Exposure to LLM integration (prompting, evaluation, observability). Solid experience with high-availability systems, failover, and resilience design. Curious mind with a desire to learn and adapt. Excellent knowledge of observability practices: logging, monitoring, tracing, metrics. Excellent communication skills in English, capable of clearly explaining complex technical subjects. Assets Knowledge of Java frameworks (Micronaut, Spring). Experience in Python. Experience in performance optimization and scaling in high-throughput environments. Familiarity with GitOps, CI/CD, IaC. Additional Information We are the pioneers and explorers of a global IT market category (DEX) that is shaping the future of work worldwide, providing our customers' IT teams with total digital visibility into their company. Our innovative solutions integrate real-time analytics, automation, and employee feedback across all touchpoints. This enables our IT teams to solve complex technical challenges, create increasingly productive work environments, and provide happy and satisfied employees in the digital workplace. With more than 1200 employees spread across 5 continents, Nexthink operates as one team, connected, collaborative, and innovative to grow continuously. We call our employees "Nexthinkers" and our commitment to diversity, inclusion, and equity is unparalleled. We currently count more than 75 nationalities among our employees, from all cultures and backgrounds, speaking many different languages. If you are looking for a change and appreciate a good atmosphere, many challenges, and fun at work, this is an excellent opportunity for you! Discover what we offer: ? Permanent contract and a competitive compensation package. ? Magnificent offices with a view of Lake Geneva, ideally located next to the Prilly-Malley station. ? Hybrid work model balancing office and remote work, with a structured approach for newcomers to foster connections and integration. ?- Flexible hours and unlimited leave (employees benefit from unlimited paid leave in addition to the 25 days of vacation that we offer) plus 3 jou