Join a US-based company as a Software Development Engineer in Test specializing in macOS integration. This role focuses on ensuring quality across endpoint security agents, network extensions, and system-level components. You'll be responsible for building sophisticated automated tests, validating complex macOS behaviors, and ensuring platform reliability. The position goes beyond simple UI testing, diving deep into system extension testing, sandbox boundary validation, and creating test frameworks that simulate real-world macOS system behavior under enterprise security constraints. Working closely with engineering and product teams, you'll be instrumental in maintaining high-quality standards throughout the product lifecycle. The role offers competitive compensation, flexible PTO, and the convenience of remote work, making it an excellent opportunity for experienced test automation engineers passionate about macOS development.