Principal MacOS Developer

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..

Malwarebytes is looking for a skilled Principal/Lead Mac Developer, who will lead complex system-level features. Malwarebytes is growing on Macs, our MB5 Security application protect millions of devices every day with the sophisticated anti-malware protection, privacy-first VPN and Identity protection. You will help build and grow the team, drive, and deliver on both roadmap and technical strategy for all our current and future Mac apps.

What You Will Do:

• Lead end-to-end architecture definition, design and code review for Mac‐native security products, including system services, daemons, system extensions, network extensions, IPC frameworks, encryption and root-level modules.
• Drive coding standards, best practices, build/CI/CD pipelines, and mentor the core Mac security engineers to raise the bar on engineering excellence.
• Develop and own key system-level subsystems with a focus on reliability, performance, maintainability and security.
• Work closely with Product, QA/Test Engineering, Threat Research and DevOps to deliver a realistic but ambitious roadmap — ensure features are delivered on time, with high quality, and with operational readiness.
• Participate in recruitment: help identify, interview, hire and onboard top Mac/OS security engineering talent; build the team's culture of security-first, collaboration and continuous learning.
• Stay abreast of the latest macOS security architecture and trends, evaluate and propose how we should evolve our product accordingly.

Skills You'll Need to Have:

• S/MS in Computer Science or related field, or equivalent work experience
• Proven experience (multiple years) in Mac native application development, especially one or more of: system-level components, daemons, privileged agents, system extensions, network/VPN stacks.
• Strong proficiency in Swift (and ideally Objective-C) with clean, maintainable code, solid design pattern use, and modern Mac app architecture.
• Deep understanding of macOS internals and APIs: System extensions, Network extension, Endpoint Security framework, daemons/agents, privileged operations.
• Experience building and owning CI/CD pipelines (for Mac builds, system-level modules, automated tests)
• Experience handling root privileges, kernel vs. user-space trade-offs, performance tuning for low-latency monitoring.
• Security-first mindset, deep understanding of Apple's security and privacy model
• Highly self-motivated person with excellent communication skills and a positive team attitude
• Experience in regular code reviews, giving and receiving professional feedback
• Experience working with remote teams and individuals while ensuring agility and velocity
• Fluent English skills

Perks & Benefits:

• An opportunity to do something great for yourself and the world
• A great work environment that supports growth, development, and most importantly having fun
• Competitive salary and equity stock incentives
• Comprehensive medical, dental, and vision insurance coverage
• Employee Referral Bonus Program
• Wellness programs

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