{"schemaVersion":"jobsearcher.job.v1","id":"5a224ab6151cfe23c78c1cf7","url":"https://jobsearcher.com/jobs/5a224ab6151cfe23c78c1cf7","canonicalUrl":"https://jobsearcher.com/jobs/5a224ab6151cfe23c78c1cf7","title":"Security Software Engineer","description":"Experience : 7-10 years, we can evaluate more senior as well but need to build a pyramid. Location: Remote (PST working hours)About The WorkYou'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: Profiling CPU and memory with Instruments and os_signpost. Debugging with LLDB, crash logs and os_log. XCTest, sanitizers, fuzzing, and xcodebuild-based CI. 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","company":"Experis","rawCompany":"experis","city":"Austin","state":"TX","isRemote":false,"isActive":true,"createdAt":"2026-10-30T10:13:59.648Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1299.05","title":"Information Security Engineers","slug":"information-security-engineers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Security Software Engineer","description":"Experience : 7-10 years, we can evaluate more senior as well but need to build a pyramid. Location: Remote (PST working hours)About The WorkYou'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: Profiling CPU and memory with Instruments and os_signpost. Debugging with LLDB, crash logs and os_log. XCTest, sanitizers, fuzzing, and xcodebuild-based CI. 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","datePosted":"2026-10-30T10:13:59.648Z","dateModified":"2026-10-30T10:13:59.648Z","hiringOrganization":{"@type":"Organization","name":"Experis","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Austin","addressRegion":"TX","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"5a224ab6151cfe23c78c1cf7"},"url":"https://jobsearcher.com/jobs/5a224ab6151cfe23c78c1cf7"}}