Senior macOS/Linux Developer

About the Role

We are seeking a highly skilled Senior macOS/Linux Developer with deep expertise in macOS/Linux internals to design, develop, and maintain advanced Data Loss Prevention (DLP) and network security products. The ideal candidate will have a strong understanding of macOS system architecture, kernel-level programming, and network protocols, with a passion for building secure, high-performance solutions to protect sensitive data and mitigate cyber threats. What You'll Do

• Design and implement macOS-specific components for DLP and network security products, ensuring seamless integration with macOS internals.

• Develop low-level system tools using Apple's modern security frameworks (Endpoint Security, Network Extension, System Extensions) to monitor and control data flows, network traffic, and system activities.

• Collaborate with cross-functional teams (e.g., network security, device control, and cloud integration) to deliver robust security solutions.

• Implement and maintain network filtering, packet inspection, and proxy capabilities on macOS using Network Extension Framework and App Proxy Provider.

• Ensure compliance with macOS security frameworks (e.g., Endpoint Security Framework, System Extensions, Network Extension Framework) and Apple's code signing and entitlements model.

• Debug and troubleshoot complex system-level issues related to macOS performance, security, and compatibility — including IPC (XPC, MQTT/ZeroMQ), daemon lifecycle (launchd), and code injection.

• Stay updated on macOS updates, Apple API deprecations (e.g., kext → System Extensions transition), security vulnerabilities, and industry trends to ensure product resilience and compliance.

• Contribute to code reviews, documentation, and best practices for secure software development in C++14, Objective-C++, and Swift.

• Work closely with QA teams to ensure robust testing and validation of security features using Google Test and Catch2 frameworks. What We're Looking For

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field (or equivalent experience).

• 5+ years of software development experience, with at least 3 years focused on macOS internals.

• Deep knowledge of macOS system architecture, including kernel programming, system calls, and macOS-specific APIs.

• Proficiency in C, C++, Objective-C, and/or Swift for macOS development.

• Strong understanding of network protocols (TCP/IP, HTTP/HTTPS, DNS) and network security principles.

• Experience with macOS security frameworks (e.g., Endpoint Security Framework, System Extensions, Network Extension Framework).

• Hands-on experience developing DLP solutions, such as data monitoring, file access control, or content filtering.

• Proficiency with Apple's modern macOS security frameworks — Endpoint Security Framework for file system and process event interception, and Network Extension Framework (App Proxy Provider) for network traffic filtering and proxy capabilities; familiarity with legacy kernel extensions (kexts) is a plus but not required.

• Experience with system-level debugging tools such as lldb, kdebug/ktrace, and Instruments for diagnosing performance, security, and compatibility issues in macOS daemons and system extensions.

• Knowledge of encryption, secure communication protocols, and data protection techniques.

• Strong problem-solving skills and ability to debug complex system-level issues.

• Excellent communication and collaboration skills to work in a fast-paced, team-oriented environment. Nice to Have

• Experience with cross-platform security solutions (macOS, Windows, Linux).

• Familiarity with cloud-based security services and integration (e.g., AWS, Azure).

• Knowledge of macOS virtualization technologies (e.g., Hypervisor Framework).

• Experience with threat detection, malware analysis, or intrusion prevention systems.

• Understanding of compliance standards (e.g., GDPR, HIPAA, PCI-DSS) and their impact on DLP solutions.

• Contributions to open-source projects or a strong portfolio of macOS-related development work.

• Experience with scripting languages (e.g., Python, Bash) for automation and testing.

• Familiarity with Agile/Scrum methodologies and DevSecOps practices.

• Background in reverse engineering or vulnerability research on macOS systems. Compensation & Benefits

• Competitive salary and benefits package (health, dental, vision, etc.).

• Opportunity to work on cutting-edge cybersecurity technologies.

• Collaborative and innovative work environment with opportunities for growth.

• Flexible work arrangements (remote/hybrid options, depending on location).

• Access to the latest tools and technologies for macOS development.