Principal Software Engineer - Browser Guard

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..

...an experienced Principal Software Engineer to join our Browser Guard engineering team. You'll help build and evolve an award-winning browser extension used by over 15 million weekly active users, delivering innovative security features that protect millions of consumers worldwide. This role will have the autonomy to drive technical decisions and work closely with Product, UX, QA, and Engineering teams to build high-impact features used by millions of customers.

What You Will Do:

Build and deliver next-generation security features for the Browser Guard engineering team

Design and develop integrations across Malwarebytes products and systems

Solve complex technical challenges by applying strong knowledge of system design, algorithms and data structures

Write clean, scalable, and high-quality code using modern engineering practices

Collaborate across Engineering, Product, UX, and QA to deliver roadmap initiatives

Mentor engineers through technical guidance, code reviews, and best practices

Drive architecture and technical direction

Leverage AI-powered development tools and workflows to improve engineering productivity

Skills You'll Need to Have:

Proven experience building product based scalable applications with React, TypeScript, and Go

Strong understanding of data structures, algorithms, and software design patterns

Experience architecting and scaling products used by millions of users

Hands-on experience with AI-assisted development workflows while maintaining high code quality

Strong focus on code quality, testing, debugging, and maintainability

Experience with Git, code reviews, and modern software development practices

Excellent communication skills with the ability to mentor and collaborate across teams

Strong ownership mindset with the ability to solve complex technical challenges independently

Annual Compensation Range: The expected salary range for this role is €75,000–€80,000 per year. Actual compensation will be determined based on experience, qualifications, and location.

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

A great work environment that supports growth, development, and well-being

An opportunity to do something great for yourself and the world