Senior MacOS Internals Lead Engineer

As a Senior macOS Internals Lead Engineer you will drive the development of low-level security and compatibility functionality. You will lead a team of exceptional engineers while remaining deeply hands-on-writing code, reverse engineering OS behavior, and directly owning key system-level components.

What You Will Do:

• Design and implement security features using macOS frameworks such as Endpoint Security and Network Extensions
• Reverse engineer macOS internals and application interactions to enhance product compatibility and security
• Develop, debug, and optimize complex system-level code in C++, Swift, and Objective-C, adhering to secure coding best practices
• Investigate and resolve issues related to macOS system extensions, launch services, XPC, and sandboxing
• Act as a force multiplier by reviewing team designs and code, offering architectural direction, and coaching team members on best practices
• Document technical findings, architectural designs, and implementation details
• Collaborate with QA, product, and support teams to ensure high-quality, secure, and testable deliverables
• Stay updated on macOS updates and security mechanisms in order to inform development
  
  

• 7+ years of systems programming experience with a focus on macOS internals, frameworks, and security
• Proven track record of delivering complex macOS features to productions with hands on coding in C++, Swift, Objective-C
• Deep expertise in macOS frameworks, including Endpoint Security, Network Extensions, Accessibility, Launch Services, File Providers, daemons, XPC and FSEvents
• Advanced skills in reverse engineering MacOS components using tools like Ghidra, Frida,IDA, Hopper, lldb or other tools of your choice. You're not afraid to look at XNU sources
• Strong understanding of macOS security mechanisms, including TCC, SIP, Gatekeeper
• Experience with debugging complex architectures on MacOS (system extensions, endpoint security, network extensions, launch services, XPC)
• Ability to produce high-quality, testable, maintainable and secure code
  
  

• Expertise with Network Extensions, DriverKit, network protocols, proxies
• Expertise with APFS, file system internals
• C# / .Net experience is a plus