Senior MacOS QA Engineer

As a Senior macOS QA Engineer, you will play a critical role in validating the stability, security, and compatibility of the company's technology for macOS. This is a deeply technical manual QA role requiring hands-on experience with macOS internals, system extensions, and application behavior.What You Will Do:Test macOS security features that span across system extensions, Endpoint Security, and Network Extension frameworksDesign and execute manual test plans for system extensions, inter-process communications (XPC), and low-level OS integration pointsExplore and document edge cases, race conditions, compatibility scenarios, and regressions across macOS versionsReproduce and isolate complex issues related to sandboxing, SIP/TCC interactions, launch services, and daemon behaviorsWork directly with development, support, product, and automation teams to triage, verify, and regress bugs and compatibility issuesValidate interactions between the company and third-party macOS apps and servicesCollaborate with SDETs to turn exploratory and regression cases into automation candidatesMaintain deep familiarity with changes in macOS releases and how they might impact functionality and compatibilityRequirements5+ years in QA for macOS applications, with a focus on security, system-level, or compatibility testingStrong understanding of macOS internals: System Extensions, Endpoint Security, XPC, TCC, SIP, Launch Services, file systems, etcFamiliarity with macOS diagnostic and monitoring tools (e.g., Console, Activity Monitor, Instruments, fs_usage, dtrace, tcpdump, lldb)Experience testing low-level products (VPNs, endpoint security, antivirus, etc.)Ability to read crash reports, debug logs, and identify root causesAbility to work independently and deeply investigate issues before escalatingExcellent written communication for clear test case documentation and bug reportsBenefitsSalary: 6,500 USD / month + HolidaysUnlimited PTO