Staff Software Engineer

Company DescriptionNexthink 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 applicationor network, before employees notice the issue. As the first solutionto allow IT to progress from reactive problem solving to proactive optimization, Nexthink enables its more than 1,300 customers to provide better digital experiences to more than 18 millionemployees. Dual headquartered in Lausanne, Switzerland and Boston, Massachusetts, Nexthink has 9 offices worldwide.Job DescriptionWe are looking for aStaff Backend Software Engineerto lead thetechnical strategy, architecture, and implementationof our large-scale AI chat agent platform. This system is designed to support20+ million users globally, making it one of the most ambitious backend initiatives at Nexthink.As aStaff Engineer, you will go beyond implementation: you willset technical direction, influence cross-team design decisions, and serve as a trusted advisor to both engineering leadership and product.You’lltackle problems ofscale, reliability, and performancewhile partnering with AI/ML, Infra, and Security teams to build production-ready AI experiences.This is ahigh-impact, high-ownershiprole whereyou’llbe entrusted to make foundational architectural decisions and mentor senior engineers, ensuring Nexthink’s AI systems are built to scale with the future.ResponsibilitiesDefine anddrive technical vision and architectural strategyfor the AI chat backend platform. Lead design ofhighly scalable, low-latency, distributed systemssupporting 20M+ global users. Partner with product, infra, and AI/ML teams toalign engineering strategy with businessobjectives. Providetechnical leadership across multiple teams, influencing design patterns, coding standards, and best practices. Architect and deliverfault-tolerant APIs and servicescapable of handling large-scale real-time workloads. Championobservability, performance, and resiliencyacross the stack. Act as amentor and multiplier, raising the technical bar and helping senior engineers grow. Leadtechnical deep dives, design reviews, and roadmap alignment discussionswith leadership. Ensuresecurity, compliance, and cost-efficiencyare embedded in design from day one. Qualifications10+ years of backend engineering experience, with3+ years in Staff or Principal-level roles. Proven success designing and scaling backend systems fortens of millions of usersorhigh-throughput real-time systems. Expert inJava (17+), Python, or Node.js, withstrongbackground indistributed systems, concurrency, and high availability. Hands-onexpertiseincloud-native architectures(AWS or equivalent),Kubernetes/ECS, and containerized deployments. Strong experience building and operatingmission-critical serviceswith SLAs in production. Deep understanding ofAPI design, streaming data, and event-driven systems. Exceptional communication skills — able toinfluence cross-functional teams and leadershipwith clear technical direction. Track recordofmentoring and elevating engineering teams. Nice to Have (Differentiators)Deep knowledge ofJava frameworks(Spring Boot, Micronaut). Advancedexpertiseinstreaming platforms(Kafka, Pulsar, Flink, Spark). Experience productionizingLLM-powered systems(RAG, fine-tuning, observability, evaluation frameworks). Priorownership ofmulti-region or global-scale deployments. Background inperformance optimization, latency reduction, and cost scalingatglobalscale. FamiliaritywithGitOps, Terraform, CI/CD, and platform engineering practices. Experience buildingenterprise chat or messaging systems. Strong understanding ofdata security, compliance, and regulatory frameworks(SOC2, ISO, GDPR). Additional InformationWe 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 1000 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 (including stock options). 📍 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 25days 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.