MacOS Platform Engineer

We are a Stealth Mode Startup building a unique product experience that aims to disrupt an industry. Operating with a lean, high-impact team, the company values technical excellence, ownership, and collaborative problem-solving. Based in Redwood City, CA, the startup offers the opportunity to work closely with founders and influence core product and architectural decisions. Team members should expect a fast-paced environment, evolving challenges, and the chance to shape a product from the ground up.

As our macOS Platform Engineer, you will be responsible for architecting the high-performance, low-overhead bridge between the unified cross-platform core module and the macOS internals. You will own deployment and lifecycle management of macOS endpoints across diverse environments. This is a hands‑on role with strategic impact—ideal for someone who wants to shape the future of device management.

• 4+ years of hands‑on experience focused on low‑level macOS software development or systems engineering.
• Strong experience writing clean, reliable Swift or Objective‑C for non‑UI, system‑level components.
• Deep understanding of macOS internals, System Extensions, daemon management, and endpoint security concepts.
• Comfortable working with cross‑platform codebases and navigating the challenge of interfacing native code with a shared, cross‑platform runtime.
• Experience creating secure, enterprise‑ready macOS installation packages, wrappers, and provisioning workflows.
• Startup‑ready mindset: comfortable with ambiguity, fast iteration, and building without a safety net.
• Security‑conscious approach, with a strong focus on threat models and attack surfaces.
• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.

• Experience with Apple's Platform SSO or identity‑aware endpoint controls.
• Familiarity with enterprise MDM tools (Jamf, Kandji, Intune) and how they deploy custom daemons/agents.
• Background in reverse‑engineering or malware analysis on macOS.

• Build and maintain macOS agents and services for device enrollment, policy enforcement, and telemetry collection.
• Collaborate closely with cross-functional teams—including core module engineers, AI/ML scientists, OS engineers, and security architects—to map shared capabilities to native macOS features and ensure consistent, cross-OS policy enforcement.
• Define resource utilization limits and optimize solutions to deliver AI-powered management and security on the endpoint.
• Optimize native hooks and wrappers to maintain a lightweight, virtually invisible CPU and memory footprint on the endpoint.
• Utilize macOS internals, launchd, System Extensions, and the Endpoint Security Framework (ESF) to implement robust endpoint monitoring and security controls.
• Build and optimize the macOS installation packages, setup applications, wrappers, and daemon provisioning tools required for seamless enterprise MDM deployment.
• Implement endpoint hardening, patching workflows, and secure boot processes.
• Build telemetry pipelines for real-time monitoring and anomaly detection.
• Ensure compliance with enterprise-grade security standards and contribute to threat modeling and mitigation strategies.