Inabia Software & Consulting Inc. · United States
Skills: Swift
Hello, ------
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 (NEFilterDa…
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