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Senior MacOS Internals Lead Engineer

Sur Global | , , spain, Spain | Posted May 23, 2026

Position Overview

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 t...

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