Software Development Engineer in Test (MacOS)

Our US based client is looking for a deeply technical and handson Software Development Engineer in Test (macOS) to own the quality of their macOS integration layers — including endpoint security agents, network extensions, and other systemlevel components. Youll work closely with engineering and product teams to build highfidelity automated tests, validate complex behavior across macOS internals, and ensure our platform’s reliability, security, and compatibility on Apple hardware.

This is not just UI testing — this is system extension testing, sandbox boundary validation, and building test frameworks that simulate realworld macOS system behavior under enterprise security constraints.

Responsibilities:

1. Work with product development teams throughout the product life cycle to ensure software quality requirements and goals are established and met.
3. Responsible for automating functional and nonfunctional tests to reduce test duration
5. Design, build, and maintain automated test infrastructure for systemlevel macOS functionality, especially around:
7. Perform code reviews and white box testing to uncover defects early in the product life cycle.

8. Requirements

   1. Strong proficiency in at least two of the following languages: Python, Swift, ObjC
   3. Design, build, and maintain automated test infrastructure for systemlevel macOS functionality, especially around: Endpoint Security, Network Extensions, Accessibility and other Mac frameworks.
   5. Experience developing automated test frameworks or comprehensive test suites targeting MacOS desktop applications and platform functionality.
   7. Participate in architectural and design reviews with engineering and product
   9. Drive regression, exploratory, and compatibility testing across macOS versions (including Sonoma and beyond)
   11. Excellent debugging and troubleshooting skills on MacOS.

   12. Nice to have:

       1. Experience in reverse engineering, disassembly, or debugging at the kerneldriver level is highly desirable.
       3. Practical knowledge of functional and regression testing methodologies for desktop applications.
       5. Familiarity with performance testing techniques (soak, stress, load testing).
       7. Background in virtualization platforms, data center operations, or VM lifecycle management.
       9. Experience integrating AILLMbased solutions into automation to improve testing efficiency.

       10. Benefits

           Salary: $7,500 USD month + Holidays

           Unlimited PTO