Here at Malwarebytes, we believe that when you're free from threats, you're free to thrive. It all started in **** with one person who needed help with a malware infection, and a community coming together to find solutions. In that moment in time a product was born for all people, with a mission to rid the world of malware. Our product has since grown and evolved, from removing malware, to protecting devices, to ever-changing prevention.

About Malwarebytes Inc.

Malwarebytes began after our founder, Marcin Kleczynski, accidentally infected his parents' computer while downloading a video game as a teenager. At the time, there was no product that could fully solve the problem, so he set out to build one.

That early experience shaped our mission: to create protection that works when people need it most.

Since then, the digital threat landscape has only grown more complex. Attackers are faster, stealthier, and more sophisticated, while traditional solutions often overwhelm people with complicated tools and settings. At Malwarebytes, we believe protection should be both powerful and refreshingly simple because if security feels too hard to use, people will not use it.

That is why our aspiration is always to stay one step ahead: cutting through the noise, stopping threats others miss, and delivering peace of mind in an unpredictable digital world.

Malwarebytes protects millions of people and businesses from online threats. We are looking for a Senior C++ Developer with strong systems programming experience to work on the core of our antivirus engine.

This is a hands-on engineering role. You will implement new protection features at both user and kernel space, and help keep our engine fast, stable,



and effective on millions of devices.

What You Will Do

Work on the antivirus engine: implement new detection and protection features

Build and maintain user and kernel-level components

Write safe, efficient C++ code that runs with high privileges on production systems

Debug hard system issues using crash dumps, kernel debuggers, and trace tools

Work with Research to bring new threat detection ideas into the engine

Review code and share knowledge with teammates

Use AI tools to speed up development and testing In Your First Year You Will

Implement several new features in the antivirus engine, end to end

Contribute to both user mode and kernel mode components

Become a reliable owner of your area of the codebase

What You Bring

8+ years of professional C++ development

Solid understanding of Windows internals at both user and kernel level

Strong debugging skills: WinDbg, crash dumps

High standards for code quality: solid grasp of SOLID principles and design patterns, applied consistently in a large codebase

Experience shipping software that runs with high privileges on production systems

Nice to Have

Experience with antivirus, EDR, or endpoint security products

Knowledge of Windows security features: ELAM, PPL, or kernel isolation

Experience with driver signing or HLK/WHQL certification

Familiarity with threat detection techniques or malware analysis

Knowledge of C# and .NET, including common patterns and best practices

Perks &

Benefits

Comprehensive medical, dental, and vision insurance coverage

Employee Referral Bonus Program

Wellness programs An opportunity to do something great for yourself and the world!

(Benefits and Perks subject to change by country/region)

📌 Senior Windows Platform Engineer (Badajoz)
🏢 Malwarebytes
📍 Badajoz