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Senior MacOS Internals Lead Engineer
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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 Nice to have: Expertise with Network Extensions, DriverKit, network protocols, proxies. Expertise with APFS, file system internals. C# / .Net experience is a plus. Salary: $10,000 - $15,000 USD /month + Holidays Unlimited PTO
