Highlights
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. Security and crypto : Verifying code signatures (SecCode / SecStaticCode) and validating certificates (SecTrust), Keychain, Entitlements, hardened runtime, and macOS privacy permissions.
Numbers & Facts
| Location | NULL, CA (Remote) |
| Industry | Computer/IT Services |
| Salary | $60–$80 |
| Company Size | 100 to 499 employees |
| Year Founded | 2009 |
| Website | http://www.tekwissen.com/ |
Description
Overview:
TekWissen is a global workforce management provider headquartered in Ann Arbor, Michigan that offers strategic talent solutions to our clients world-wide.
Job Title: Senior macOS Systems Software Engineer Endpoint Security
Location: Bay Area, CA
Duration: 6-12 Months
Job Type: Temporary Assignment
Work Type: Remote (PST working hours)
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.
TekWissen is a global workforce management provider headquartered in Ann Arbor, Michigan that offers strategic talent solutions to our clients world-wide.
Job Title: Senior macOS Systems Software Engineer Endpoint Security
Location: Bay Area, CA
Duration: 6-12 Months
Job Type: Temporary Assignment
Work Type: Remote (PST working hours)
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:
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.
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: launched 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 (NEFilter Data Provider) and packet-level (NEFilter Packet Provider), 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 Disk Arbitration (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.
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 (NEFilter Data Provider) and packet-level (NEFilter Packet Provider), 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 Disk Arbitration (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.
TekWissen Group is an equal opportunity employer supporting workforce diversity.
Testing against macOS and Xcode betas before public release.
Experience shipping EDR/AV, network security or device-management products.
TekWissen Group is an equal opportunity employer supporting workforce diversity.
About Company
WE THE TEKWISSEN PEOPLE
TekWissen offers you a broader portfolio of services, industry-leading solutions, and the meaningful innovations that give you greater flexibility and speed to respond to market dynamics, reduced costs and risk to improve enterprise performance, and increased productivity to enable growth.
To keep pace with global market demands, TekWissen keeps its finger on the pulse of change. Our organized approach to guiding a project from its inception to closure. Managing projects is becoming more and more important as we enter the digital era. To cope with the pace that this transition demands, a method is required to manage projects so they can yield quality work, while incorporating efficient use of time and resources.
Project involves identifying which quality standards are relevant to the project and determining how to satisfy them.
It is important to perform quality planning during the Planning Process and should be done alongside the other project planning processes because changes in the quality will likely require changes in the other planning processes, or the desired product quality may require a detailed risk analysis of an identified problem. It is important to remember that quality should be planned, designed, then built in, not added on after the fact.
Capabilities and accomplishments in one TekWissen business enhance the opportunity for success in the others. Put simply, TekWissen's unique combination of attributes promotes success.