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

Nexthink; Madrid; Híbrido; EUR 90.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Health insurance

Hybrid work model

Flexible hours

Unlimited vacation

Training platforms

Maternity/paternity leave

Referral bonuses

Descripción de la vacante

Nexthink in Madrid is seeking an experienced software engineer to design, build, and evolve Nexthink’s Collector endpoint agents for Windows and macOS.

You will write high-performance C++ code close to the OS, own features end-to-end from requirements to deployment, and tackle cross-platform challenges at scale.

Join a team that values quality, security, and measurable impact, with a hybrid work model, generous benefits, and a culture of learning.

Formación

• 5+ years of software development experience.
• Fluency in C++ 20/23.
• Strong understanding of operating system internals.
• Experience in OS-level software development on Windows and/or macOS.
• Proven end-to-end feature delivery from requirements to delivery.
• Knowledge of lean and well-testable code.

Responsabilidades

• Design, build, and evolve Nexthink’s Collector endpoint agents for Windows and macOS.
• Develop high-performance C++ software close to the OS with emphasis on efficiency and stability.
• Own features end-to-end from product requirements to production rollout and observability.
• Investigate OS-level issues across diverse customer fleets and debug complex code.
• Improve performance, reliability, security, and maintainability of Collectors.

Conocimientos

C++ 20/23

OS internals

Cross-platform Windows/macOS

English communication

AI coding tools

Herramientas

AI coding tools

Descripción del empleo

Job Description

Inside the Nexthink Engineering department, the team you will be joining participates in building the Collectors: the endpoint agents that run on the systems of millions of employees worldwide. The Collector collects meaningful data at the OS level, aggregates it on the device, and reports it to our cloud analytics platform. They also help remediate detected issues and improve users' device experience. Collectors are a complex and critical part of Nexthink products, running on Windows and macOS.

Here, you'll take on broad, non-conventional problems with the autonomy to shape and own them — and your ideas can reach millions of devices worldwide. We hold a high bar for quality, performance, and security, and we give engineers the room to ship and grow.

Responsibilities

• Design, build, and evolve Nexthink’s Collector endpoint agents running on millions of Windows and macOS devices worldwide.
• Develop reliable, high-performance modern C++ software close to the operating system, where efficiency, stability, and quality directly matter.
• Own impactful features end-to-end — from product requirements to production rollout, observability, and measurable impact.
• Tackle complex cross-platform challenges in real-world environments, investigating deep OS-level issues across diverse customer fleets.
• Continuously raise the bar for the performance, reliability, security, and maintainability of our Collectors, helping shape technology that operates at global endpoint scale.

Qualifications

• 5+ years of experience in software development.
• Fluency in C++ 20/23.
• Strong, demonstrable understanding of operating system internals.
• Experience in OS-level software development and research on Windows and/or macOS.
• Proven experience leading a feature end-to-end, from product requirements to delivered solution.
• Understanding of the concepts of pure, lean, and well-testable code.
• Ability to navigate and debug complex code.
• Ability to build tools that support the development process.
• Proficiency or hands-on experience with AI agentic coding tools.
• A product-oriented mindset and comfort working in a dynamic environment.
• Clear, concise communication in English.

Nice to have

• Experience in kernel-mode software development.
• Experience in cross-platform development: Windows and macOS.

Benefits

• Permanent Contract and a competitive compensation package.
• Health insurance through our partnership with ACKO, including OPD coverage for dental, vision, health check-ups, consultations, and pharmacy expenses.
• 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 22 days of holidays we offer). Plus, company-paid bank holidays (12), sick days (10-30), bereavement leave (5), and 3 days per year for volunteering.
• Free access to professional training platforms to explore your interests and enhance your skills.
• Stay covered against accidents, bodily injuries, and disabilities with our personal accident insurance policy, providing assurance with coverage up to three times your annual CTC.
• New mothers are entitled to up to 26 weeks of maternity leave, with the flexibility to use up to 8 weeks before the expected delivery and the remaining 18 weeks after. Birth fathers can take 6 weeks of paternity leave, while adoptive parents are eligible for 26 weeks of leave for mothers and 6 weeks for fathers.
• Under the Payment of Gratuity Act, receive gratuity at the rate of 15 days of basic pay for every completed year of service, provided you've been employed by the company for a minimum of 5 years. Gratuity is payable at retirement or resignation based on your last drawn basic pay.
• Bonuses for referring successful hires after three months of continuous employment.

Additional Information

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 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!

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.