MacOS Developer

Threat Locker® is a leader in endpoint protection technologies, providing enterprise-level cybersecurity tools to improve the security of servers and endpoints. The Threat Locker® platform with Application Allow listing, Ring fencing™, Storage Control, Elevation Control, Endpoint Network Control, Configuration Management, and Operational Alert solutions are leading the cybersecurity market toward a more secure approach of blocking the exploits of application vulnerabilities.

Threat Locker is seeking a skilled macOS Developer to help build, enhance, and maintain the macOS components of the Threat Locker endpoint security platform. This role is responsible for developing secure, reliable endpoint software that powers Threat Locker's Zero Trust architecture across enterprise environments. The successful candidate will implement and maintain functionality supporting Application Allow listing, Ring fencing™, Storage Control, Elevation Control, Endpoint Network Control, and other products within the Threat Locker portfolio, helping enforce Zero Trust, least privilege, application control, privilege management, storage protection, and network security.

The role will be based in Orlando, FL and is an in-office position.

• Design, develop, test, and maintain Threat Locker's macOS endpoint agent and supporting components.
• Develop secure macOS services, background processes, System Extensions, Network Extensions, XPC Services, Launch Daemons, and user-facing applications.
• Integrate macOS functionality with Threat Locker's policy engine, management portal, and cloud platform.
• Develop and maintain real-time policy enforcement for applications, files, storage devices, network activity, and privilege elevation.
• Leverage Apple security technologies including Endpoint Security Framework, Network Extension Framework, System Extensions, XPC Services, and Launch Daemons.
• Build and improve user interfaces using App Kit and SwiftUI.
• Optimize application performance, reliability, scalability, and security across supported macOS versions.
• Diagnose and resolve complex issues involving system permissions, security frameworks, networking, and enterprise deployments.
• Research new macOS platform features, security changes, and OS updates to ensure continued compatibility and protection.
• Collaborate with cross-functional engineering teams to deliver new features and continuously improve the Threat Locker platform.
• Take ownership of product quality by identifying, troubleshooting, and resolving complex issues while continuously improving performance, reliability, and security.

• 2+ years of professional macOS software development experience.
• Strong proficiency in Swift and Objective-C.
• Experience developing macOS applications, agents, services, system components, or endpoint software.
• Experience working with APIs, local storage, logging, and secure client-server communication.
• Ability to troubleshoot complex macOS issues involving permissions, networking, System Extensions, and enterprise deployments.
• Strong understanding of secure coding practices.
• Ability to write clean, maintainable, production-quality code.
• Experience using source control systems such as Git.
• Excellent analytical, troubleshooting, and problem-solving skills with strong attention to detail.

• Experience with C and/or C++.
• Experience with Apple's Endpoint Security Framework, Network Extension Framework, or System Extensions.
• Experience developing endpoint protection, application control, endpoint detection and response (EDR), device control, or other cybersecurity software.
• Experience with code signing, notarization, provisioning profiles, and macOS application deployment.
• Familiarity with enterprise…