Principal macOS Internals Developer

A cybersecurity company is developing advanced enterprise authentication and access security solutions for large-scale organizational environments.

The company’s platform helps organizations improve security, streamline user access, and reduce operational complexity across modern and traditional IT environments.

This is a hands-on, deep technical individual contributor role focused on a macOS-based enterprise security product. The role involves system-level macOS development, working with Apple frameworks, authentication flows, and enterprise endpoint environments.

Responsibilities

• Design and build system-level components of the macOS desktop authentication agent.

• Develop Authorization Plugins, launch daemons/agents, XPC services, Keychain integrations, and FileVault-related capabilities.

• Work with macOS system frameworks, login window flows, authentication mechanisms, and Apple identity technologies.

• Track macOS beta releases and drive compatibility across annual OS updates.

• Diagnose API deprecations, OS-level regressions, and compatibility issues before they reach customers.

• Evaluate and adopt Apple’s modern identity technologies, including Platform SSO, passkeys, and Secure Enclave-backed credentials.

• Ensure smooth coexistence with enterprise MDM and endpoint tools such as Jamf and Intune.

• Contribute to code signing, notarization pipelines, secure update mechanisms, crash analysis, and diagnostics.

• Investigate complex OS-boundary issues escalated from enterprise customers.

• Collaborate closely with the existing macOS developer and broader R&D teams, with potential to grow into technical leadership of the macOS domain.

Required Qualifications

• B.Sc. or M.Sc. in Computer Science, or in a related scientific / mathematical field

• At least 8 years of software development experience

• At least 4 years of system-level macOS development experience

• Strong hands-on experience with Swift and/or Objective-C

• Strong knowledge of C/C++

• Deep understanding of macOS internals, system frameworks, authentication flows, and user-space system components.

• Experience developing reliable, production-grade software for enterprise environments.

• Strong debugging, problem-solving, ownership, and technical investigation skills.

• Ability to work independently in a deep technical individual contributor role.

• High level of English and strong communication skills.

JOB NO. 500411