Senior Software Engineer C++ (Endpoint Agent, OS internals)

Nexthink seeks a Senior Software Engineer to design and maintain C++ endpoint agents for Windows and macOS. The role focuses on OS-level development, performance optimization, and end-to-end feature ownership in a hybrid Lausanne setting.

The engineering team develops Collectors, which are endpoint agents deployed on millions of devices globally. These agents gather operating system data, aggregate it, and send it to cloud analytics to help resolve technical issues. The position requires taking ownership of complex, non-standard problems and driving solutions with a high degree of independence.

Responsibilities

• Architect, develop, and maintain the Collector endpoint agents that operate across Windows and macOS systems worldwide.
• Write efficient, modern C++ code that interacts closely with operating system layers.
• Manage features from initial product requirements through to production deployment, monitoring, and impact measurement.
• Investigate and resolve deep, cross-platform operating system issues within diverse customer environments.
• Ensure the highest standards of performance, security, reliability, and code maintainability for the agent software.

Requirements

• At least five years of professional software development experience.
• Expert-level proficiency with C++ 20 or C++ 23 standards.
• Deep knowledge of operating system internals and architecture.
• Hands-on background in developing and researching software at the OS level for Windows and/or macOS.
• Track record of leading features from concept to delivery.
• Strong grasp of writing pure, lean, and highly testable code.
• Ability to debug and navigate through complex codebases.
• Experience creating internal tools to streamline the development workflow.
• Practical experience using AI agentic coding tools.
• Product-focused mindset with adaptability in fast-paced settings.
• Fluent English communication skills.

Nice to have

• Background in kernel-mode software development.
• Experience working across both Windows and macOS platforms.

What the company offers

• Permanent employment contract with a competitive salary package.
• Modern office space overlooking Lake Geneva, situated near the Prilly-Malley train station.
• Hybrid work arrangement with a structured onboarding process for new team members.
• Flexible working hours, unlimited paid time off (in addition to 25 days of holidays), and three paid volunteer days.
• Complimentary access to an on-site fitness center.
• Reimbursement for a half-fare public transport travel card.
• Partial reimbursement (up to 50%) for French language courses.
• Provided snacks including fresh fruit, cookies, and soft drinks.
• Regular team events such as volunteer days, pizza talks, team building activities, and office-hosted meetups.
• Referral bonuses for successful hires after a three-month period.
• Relocation assistance for candidates moving from other countries.

About the company

Nexthink stands as the leading provider of digital employee experience management software. The company supports over 1,500 customers in enhancing digital experiences for more than 25 million employees. Nexthink fosters a collaborative 'One Team' culture that values diversity, with over 75 nationalities represented. The organization maintains high standards for quality and security while encouraging engineers to innovate and grow.

• Leadership in digital employee experience management software.
• Supporting over 1,500 customers and 25+ million employees globally.
• High standards for quality, performance, and security.
• Collaborative 'One Team' approach to innovation and growth.
• Strong commitment to diversity, inclusion, and equity.
• Workforce representing over 75 nationalities and diverse cultural backgrounds.