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# Principal Software Engineer - Windows EDR

- **Company:** Threatdown
- **Location:** Spain
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), C Sharp (Programming Language), C++ (Programming Language), Code Review, Cyber Security, Computer Programming, Computer Engineering, Software Debugging, Device Drivers, Memory Management, Software Engineering, WinDBg, Diagnostic Tools, Information Technology
- **Published:** September 1, 2026
- **Apply:** https://www.jobleads.com/es/job/e7356dc9f740759ad2ab3c9b6966763e2

## About the Role

* Bachelor's or Master's degree in Computer Science, Computer Engineering, Cybersecurity, a related field, or equivalent practical experience.
 * Professional software development experience on Microsoft Windows; experience with systems-level or endpoint software is especially helpful.
 * Proficiency in C++ and familiarity with C#, or the ability to ramp up quickly in C#.
 * Solid understanding of Windows internals, operating system architecture, or system-level programming concepts.
 * Experience developing software with Windows APIs and native operating system services.
 * Experience with Windows driver development, kernel-mode programming, or closely related low-level Windows technologies.
 * Debugging and troubleshooting experience using WinDbg or comparable diagnostic tools.
 * Experience contributing to production-grade software or services used by customers or internal teams.
 * Understanding of secure software development practices and an interest in building reliable, trustworthy systems.
 * Strong analytical and problem-solving skills, with the ability to communicate technical ideas clearly with teammates and partners.
 * Ability to communicate effectively in written and spoken English in a collaborative engineering environment.

## Description

* Design, develop, and maintain Windows endpoint sensor components in C++ and C#.
 * Build and enhance telemetry collection, detection, prevention, and response capabilities for EDR products.
 * Develop software that operates across both user-mode and kernel-mode environments.
 * Design and maintain Windows drivers, system services, and other low-level platform components.
 * Implement new endpoint protection capabilities and continuously improve existing detection technologies.
 * Debug and resolve complex issues involving Windows internals, kernel interactions, memory management, and system performance.
 * Partner with detection engineers and security researchers to translate threat intelligence into product capabilities.
 * Optimize endpoint performance, stability, and resource utilization across large-scale deployments.
 * Participate in architecture reviews, code reviews, and engineering design discussions.
 * Contribute to engineering best practices, quality initiatives, and continuous improvement across the team.


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