macOS Endpoint Security Engineer

Inabia Software & Consulting Inc.; Oregon; Hybrid; USD 90,000 - 96,000; Full time

Job summary

Inabia Software & Consulting Inc. seeks a Senior macOS Cyber Security Engineer to work on the macOS sensor for CrowdStrike Falcon, an on-device security agent. The role emphasizes high-concurrency, memory- and CPU-efficient code running in user space as a System Extension.

You'll develop in modern C++ (C++17/20) and Swift 6, bridging with Objective-C++, and ensure robust performance across macOS APIs, IPC with XPC, and cross-platform codebases. Remote role with PST hours.

Qualifications

• Experience with C++17/20 and Swift 6 in security apps.
• Familiarity with macOS system programming APIs.
• Knowledge of memory and CPU profiling.
• Experience across Mac/Windows/Linux codebases.

Responsibilities

• Develop macOS sensor for CrowdStrike Falcon.
• Ensure high concurrency and performance.
• Bridge Swift, C++, and C APIs.
• Work with System Extensions and IPC (XPC).

Skills

Modern C++

Swift 6

Objective-C++ bridging

XPC NSXPCConnection

macOS system programming

Performance profiling

Job description

Role

Senior macOS Cyber Security Engineer, Endpoint Security (C++/Swift)

Location

Remote (PST working hours)

Client

Accenture/Amazon

Work Authorization

U.S. Citizen (USC) or Green Card (GC) holders only

Requirement Type

Contractual

Experience

6-10 years, we can evaluate more senior as well but need to build a pyramid.

W-2 Rate

$65 - $70/hr.

Job Description

About the work

You’ll work on the macOS sensor for CrowdStrike Falcon, an on-device security agent. It monitors file, process, network and identity activity, blocks malicious behavior, and streams telemetry to the cloud. The sensor runs entirely in user space as a System Extension. Much of the code is shared with Windows and Linux. The work requires high concurrency, high reliability, careful attention to memory & CPU usage and performance.

Required

• Languages: modern C++ (C++17/20) and Swift 6 (async/await, actors, strict concurrency checking). Also Objective-C++ to bridge Swift, C++ and C APIs.
• macOS systems programming: Foundation and CoreFoundation, GCD and pthreads, POSIX/BSD APIs, Mach IPC, launchd daemons and agents, and XPC (C API and NSXPCConnection).
• Performance, debugging and test:o Profiling CPU and memory with Instruments and os_signpost.o Debugging with LLDB, crash logs and os_log.o XCTest, sanitizers, fuzzing, and xcodebuild-based CI.o Apple Silicon and Intel.
• Experience with codebases shared across Mac, Windows and Linux.

Core skills (one or more of the areas listed below)

• Process model and IPC: launchd daemons and agents, and XPC (C API and NSXPCConnection).
• Endpoint Security and System Extensions: Endpoint Security clients handling both blocking (AUTH) events and notification events, user/MDM approval, upgrades.
• Network Extension: content filters, both flow-level (NEFilterDataProvider) and packet-level (NEFilterPacketProvider), and Network.framework.
• Security and crypto: Verifying code signatures (SecCode / SecStaticCode) and validating certificates (SecTrust), Keychain, Entitlements, hardened runtime, and macOS privacy permissions.
• Devices and storage: IOKit (hardware and device enumeration) and DiskArbitration (disk and volume events).
• Packaging and deployment: installers, notarization, and MDM configuration profiles deployed through Jamf, Intune or similar tools.
• Performance, debugging and test: Profiling CPU and memory with Instruments and os_signpost, Debugging with LLDB, crash logs and os_log, XCTest, sanitizers, fuzzing, and xcodebuild-based CI.

Nice to have

• UI: SwiftUI and AppKit apps and app extensions.
• Testing against macOS and Xcode betas before public release.
• Experience shipping EDR/AV, network security or device-management products.