macOS Systems & Security Engineer (Swift/Objective-C/C++)

Darwoft; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Darwoft is seeking a principal-level software engineer to design and evolve security-sensitive software operating close to macOS. You will shape technical direction while collaborating with engineering, security, product, and other technical partners on systems where reliability and security are critical.

You will build low-level macOS components, implement authentication and endpoint security, and use native macOS facilities such as XPC, Launch Daemons, Keychain, and System Extensions.

Qualifications

• Principal-level engineering experience with macOS internals.
• Strong programming skills in Swift, Objective-C, and/or C++.
• Familiarity with native macOS security frameworks and privileged processes.
• Strong fundamentals in software engineering, including secure inter-process communication.
• Ability to work through complex security and reliability problems with cross-functional teams.
• English proficiency at B2/C1 level.

Responsibilities

• Build and maintain low-level macOS components and privileged services.
• Develop authentication, identity, and endpoint security capabilities.
• Use native macOS facilities such as XPC, Launch Daemons, Keychain, Authorization Services, and System Extensions.
• Secure communication between application-level and system-level components.
• Contribute to architecture and technical direction for security-focused software.
• Work with partner teams to address system reliability, cryptography, and enterprise deployment needs.

Skills

macOS internals

Swift

Objective-C

C++

Secure IPC

Cross-functional collab

Tools

XPC

Launch Daemons

Keychain

System Extensions

Job description

Role overview

Design and evolve security-sensitive software that works close to the macOS operating system for identity, authentication, and endpoint protection. This principal-level individual contributor will shape technical direction while collaborating with engineering, security, product, and other technical partners on systems where reliability and security are critical.

Responsibilities

• Build and maintain low-level macOS components and privileged services.
• Develop authentication, identity, and endpoint security capabilities.
• Use native macOS facilities such as XPC, Launch Agents and Daemons, Keychain, Authorization Services, and System Extensions.
• Secure communication between application-level and system-level components.
• Contribute to architecture and technical direction for security-focused software.
• Work with partner teams to address system reliability, cryptography, and enterprise deployment needs.

Requirements

• Principal-level engineering experience with strong macOS internals knowledge.
• Systems programming experience with Swift, Objective-C, and/or C++.
• Familiarity with native macOS security frameworks and privileged processes.
• Strong software engineering fundamentals, including secure inter-process communication.
• Ability to work through complex security and reliability problems with cross-functional teams.
• English proficiency at B2/C1 level.

Benefits and work setup

Fully remote, full-time contractor role open across Latin America. The project focuses on cybersecurity, identity assurance, authentication, and enterprise endpoint security.