As the Senior macOS QA Engineer, you will be responsible for validating the stability, security, and compatibility of a secure macOS platform used to protect sensitive systems. You will work alongside a team of engineers and reverse engineers to design and execute manual test plans that dig into system extensions, inter process communication, and low level operating system behavior. This is a hands-on, investigative role suited to someone who enjoys uncovering edge cases and understanding how complex systems truly work.

Responsibilities Test macOS security features spanning system extensions, Endpoint Security, and Network Extension frameworks

Design and execute manual test plans for system extensions, inter process communication, and low level operating system integration points

Explore and document edge cases, race conditions, compatibility scenarios, and regressions across macOS versions

Reproduce and isolate complex issues related to sandboxing, SIP and TCC interactions, launch services, and daemon behaviors

Work directly with development, support, product, and automation teams to triage, verify, and regress bugs and compatibility issues





Validate interactions between the platform and third party macOS apps and services

Collaborate with SDETs to turn exploratory and regression cases into automation candidates

Maintain close familiarity with changes in macOS releases and how they may impact functionality and compatibility

Requirements 5+ years of QA experience with macOS applications, with a focus on security, system level, or compatibility testing

Strong understanding of macOS internals, including System Extensions, Endpoint Security, XPC, TCC, SIP, Launch Services, and file systems

Familiarity with macOS diagnostic and monitoring tools such as Console, Activity Monitor, Instruments, fs_usage, dtrace, tcpdump, and lldb

Experience testing low level products such as VPNs, endpoint security tools, or antivirus software

Ability to read crash reports and debug logs and identify root causes

Ability to work independently and investigate issues thoroughly before escalating

Excellent written communication for clear test case documentation and bug reports

Benefits Compensation: $6,500 USD per month

PTO and Holidays

We only accept CVs submitted in English.

📌 Senior MacOS QA Engineer (Madrid)
🏢 Sur Global
📍 Madrid