Senior Software Engineer

• 14 July 2026 • 100% • Indefinite duration • Lausanne Senior Software Engineer • 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 more than 1,500 customers to provide better digital experiences to more than 25 million employees. Having two headquarters in Lausanne, Switzerland, and Boston, Massachusetts, Nexthink has 9 offices worldwide. LI-Hybrid # Job Description We are looking for a passionate and experienced backend engineer, with a solid background in designing and implementing scalable, reliable, and high-performance backend systems. As a member of one of our AI teams, you will be responsible for building and evolving the core services and infrastructures that power our AI-driven products. This role involves architecting and delivering backend solutions capable of handling large-scale data processing, real-time interactions, and integration with multiple services. You will work closely with product, infrastructure, and frontend teams to ensure our systems are robust, efficient, and capable of supporting rapid product growth. Since the role is cross-functional, the ability to communicate complex technical concepts clearly and pragmatically is essential. You will thrive in a collaborative environment where your work directly enables innovative, production-ready, AI-powered experiences at scale. Responsibilities • Design, build, and evolve distributed backend systems serving millions of users. • Ensure end-to-end delivery of features: from design, implementation, deployment, and monitoring. • Architect low-latency real-time backend APIs and services for AI-driven conversational systems. • Develop cloud-native services in Java or Python, 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 • BSc/BEng or Master in Computer Science (or equivalent) • More than 5 years of professional experience in backend engineering • Proficiency in at least one of the following languages: Java (17+), Python, Node.JS • 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). • Solid experience with high-availability systems, failover, and resilience design. • Curious mindset with a desire to learn and adapt • Excellent knowledge of observability practices: logging, monitoring, tracing, metrics. • Excellent communication skills in English, able to clearly explain complex technical topics. Assets • Knowledge of Java frameworks (Micronaut, Spring). • Experience in Python • Experience with distributed data systems (e.g., Redis, Apache Kafka). • Exposure to LLM integration (prompting, evaluation, observability). • Experience in performance optimization and scaling in high-throughput environments. • Familiarity with GitOps, CI/CD, IaC Additional Information We are the pioneers and trailblazers of a global IT market category (DEX) that shapes the future of work in the world, offering our customers' IT teams total digital visibility across their enterprise. Our innovative solutions integrate real-time analytics, automation, and employee feedback across all touchpoints. This enables our IT teams to resolve complex technical challenges, create increasingly productive work environments, and provide happy and satisfied employees in the digital workplace. With more than 1200 employees across 5 continents, Nexthink operates as a single team, connecting, collaborating, and innovating to grow continuously. We call our employees “Nexthinkers” and our commitment to diversity, inclusion, and equity is unparalleled. We currently have 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 enjoyment at work, this is an excellent opportunity for you! Discover what we offer: • ? Permanent contract and a competitive compensation package. • ? Beautiful offices, ideally located next to the Prilly-Malley station • ? Hybrid work model eq