Senior Backend Engineer / Technical Lead

Nexthink is the leader in digital employee experience management software. The company provides IT leaders with unprecedented insight allowing them to see, diagnose and fix issues at scale impacting employees anywhere, with any application or network, before employees notice the issue. As the first solution to allow IT to progress from reactive problem solving to proactive optimization, Nexthink enables its more than 1,500 customers to provide better digital experiences to more than 25+ million employees. Dual headquartered in Lausanne, Switzerland and Boston, Massachusetts, Nexthink has 9 offices worldwide.

We are looking for an experienced Senior Backend Engineer / Tech Lead to design and build scalable, reliable, and high-performance backend systems for Nexthink Assist, our AI-native product. You'll integrate new capabilities into Assist and customize and enhance the workspace experience that sits at the center of it.

You will develop core services and infrastructure supporting large-scale data processing, real-time interactions, and integrations across multiple systems. This is a highly collaborative role requiring clear communication, strong technical judgment, and the ability to work effectively across teams.

You will own significant backend components end to end, set technical direction, and navigate cross-team decisions and disagreements with minimal oversight.

Responsibilities

• Design, build, and scale distributed backend systems that serve millions of users.

• Drive end-to-end delivery of features: from design, implementation, deployment, and monitoring.

• Architect real-time, low-latency APIs and backend 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 resiliency, 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 and infra engineering.

• 8+ years of professional backend engineering experience.

• Proficient in modern Java (17+).

• Proven experience designing and scaling backend systems for millions of users or high-throughput real-time services.

• Solid 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).

• Strong background in high availability systems, failover, and resiliency design.

• Curious mindset with an eagerness to learn and adapt.

• Excellent knowledge of observability practices: logging, monitoring, tracing, metrics.

• Strong communication skills in English, able to explain complex technical topics clearly.

Nice to have

• Java frameworks knowledge (Micronaut, Spring).

• Python experience.

• Performance tuning and scaling experience in high-throughput environments.

• Familiarity with GitOps, CI/CD, IaC.

We are the pioneers and trailblazers of a global IT Market Category (DEX) that is shaping the future of how the world works, giving our customers’ IT Teams total digital visibility across their enterprise. Our innovative solutions integrate real-time analytics, automation, and employee feedback across all endpoints. This enables our IT teams to solve complex technical challenges, create ever more productive workplaces, and deliver happy, satisfied employees in the digital workplace.

With over 1200 employees across 5 continents, Nexthink operates as One Team, connecting, collaborating and innovating to continuously grow. We call our employees ‘Nexthinkers’ and our commitment to diversity, inclusion, and equity is second to none. We currently have over 75 nationalities working with us, from all cultures and backgrounds, speaking many different languages.

If you are looking for a change and like a nice atmosphere, lots of challenges, and having fun while working, this is a great opportunity for you! Check what we offer:

• 💼 Permanent Contract and a competitive compensation package.

• 📍 Beautiful office with a view of Lake Geneva, conveniently located next to the Prilly-Malley train station

• 🏡 Hybrid work model balancing office and remote work, with a structured approach for new hires to foster connections and onboarding.

• 🏖️ Flexible Hours and unlimited vacation (employees have unlimited paid time off on top of the 25 days of holidays we offer) plus 3 company-paid volunteer days.

• 🤻 Free access to a fitness centre inside the building.

• 🚞 Reimbursement of the half-fare travel card for public transport.

• 🧑‍🏫 Reimbursement up to 50% of the cost of French classes.

• 🍉 Fresh fruit, cookies, and soft drinks as well.

• 🤝 Regular company and team events like Voluntary Days, Pizza talks, Team Building activities, hosting Meetups at the office and more!

• 📣 Bonuses for referring successful hires after three months of continuous employment.

• 🚚 We offer a relocation package to people who are coming from another country.

Please note that not all the benefits listed above are available for temporary, contract, and internship roles. To ensure you have the most up-to-date information, we recommend checking with your Recruitment Partner.