Principal Software Engineer

Here at Malwarebytes, we believe that when you’re free from threats, you’re free to thrive. It all started in 2008 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 is looking for..

Our team is looking for a collaborative, motivated, and inspiring individual to join our Browser Guard engineering team as a Principal Software Engineer. Browser Guard is an award-winning browser extension with over 15 million weekly active users. We are looking for someone who is team-oriented, always learning, has a "can-do" attitude and is performance-minded. The ideal candidate should be one who takes ownership and is always looking for ways to improve our products. Being a distributed team, we believe in strong autonomy and trust in our engineers.

What You Will Do:

• Develop next generation features to protect our consumers
• Write amazing code, using best practices and the latest technologies
• Ensure you deliver quality code by writing design documents and unit tests
• Collaborate with Product, UX and QA to deliver an ambitious roadmap on time and with high quality
• Design and develop key integrations between Malwarebytes' systems and products
• Support your fellow team members: mentor, proactively communicate & code review
• Work as a team to ensure everyone meets their goals

Skills You'll Need to Have:

• Strong understanding of data structures, algorithms, and common design patterns
• React, JavaScript (TypeScript), and Go chops
• Experience architecting projects used by millions of clients
• AI workflows without quality degradation • Experience working with Git
• Experience in regular code reviews, giving and receiving professional feedback
• UX and user-centric mindset
• You have an instinct for writing tests
• You manage your tasks very well and do an excellent job of estimating work
• Excellent debugging and troubleshooting skills
• Excellent communication and learning skills
• Positive team attitude

Perks & Benefits:

• Private Health Insurance - Comprehensive medical, dental, and vision insurance coverage, subject to change by country/region
• Wellness programs
• Winter break between Christmas and New Year - 4 extra days in 2026
• A great work environment that supports growth, development, and well-being
  

 An opportunity to do something great for yourself and the world