Senior Software Engineer (C++, Os Internals)

Senior Software Engineer (C++): Developing and maintaining endpoint agent software (Collectors) for cross-platform data extraction and remediation with an accent on OS internals, performance, and stability. Focus on solving complex concurrency and system-level challenges across Windows, macOS, and Linux environments to ensure high-performance data analytics.Location: Hybrid model in Madrid, Spain. Relocation assistance is available.CompanyNexthink is a leader in digital employee experience management software, providing IT visibility to over 1,300 global customers to optimize digital workplaces.What you will doDesign, prototype, and implement reliable system-level agents for Windows, macOS, and Linux.Analyze OS-level behavior to extract meaningful data for analytics systems.Develop cross-platform C++ solutions while maintaining platform-specific performance standards.Debug and resolve complex technical issues within the OS ecosystem.Collaborate with engineering teams to improve product quality and scalability.Measure the impact of your code in production environments.Requirements7+ years of experience in software development.Fluent in C++ with knowledge of modern standard iterations.Deep understanding of operating systems internals.Strong development experience on Windows and/or macOS platforms close to the OS level.Proven experience leading or contributing to significant technical projects.Ability to perform OS-level research and debug complex code.Clear and concise English communication skills.Nice to haveExperience in kernel-mode software development.Proven work in multi-platform or cross-platform environments.Culture & BenefitsPermanent contract with competitive compensation.Hybrid work model with office presence near Bernabeu Stadium in Madrid.Private health insurance (Sanitas) and daily meal vouchers.Unlimited paid time off on top of 23 days of holidays.Gym subscription support and flexible compensation for transport/childcare.Reimbursement for English and Spanish language learning.#J-*****-Ljbffr

7+ years of experience in software development. Fluent in C++ with knowledge of modern standard iterations. Deep understanding of operating systems internals. Strong development experience on Windows and/or macOS platforms close to the OS level. Proven experience leading or contributing to significant technical projects. Ability to perform OS-level research and debug complex code. Clear and concise English communication skills. Nice to have Experience in kernel-mode software development. Proven work in multi-platform or cross-platform environments.

Permanent contract with competitive compensation. Hybrid work model with office presence near Bernabeu Stadium in Madrid. Private health insurance (Sanitas) and daily meal vouchers. Unlimited paid time off on top of 23 days of holidays. Gym subscription support and flexible compensation for transport/childcare. Reimbursement for English and Spanish language learning. #J-*****-Ljbffr

Nexthink is a leader in digital employee experience management software, providing IT visibility to over 1,300 global customers to optimize digital workplaces. What you will do Design, prototype, and implement reliable system-level agents for Windows, macOS, and Linux.