Senior macOS Security QA Specialist

Sur; Málaga; On-site; EUR 60,000 - 84,000; Full time

Job summary

Sur in Málaga, Spain, is seeking a Senior macOS QA Engineer to validate a secure macOS platform used to protect sensitive systems. This hands-on role emphasizes manual and exploratory testing over automation, with deep knowledge of macOS internals and system behavior.

You will design test plans, investigate kernel and inter-process interactions, and collaborate with engineers and reverse engineers to ensure compatibility and security across macOS versions. English CVs are required.

Qualifications

• 5+ years of QA experience with macOS applications focusing on security, system-level, or compatibility testing.
• Strong understanding of macOS internals including System Extensions, Endpoint Security, XPC, TCC, SIP, and Launch Services.
• Ability to read crash reports and debug logs to identify root causes.
• Experience with reading and analyzing macOS logs and performance data.
• Willingness to work during US Eastern Time business hours and communicate in English.

Responsibilities

• Test macOS security features across system extensions, Endpoint Security, and Network Extension frameworks.
• Design and execute manual test plans for system extensions, IPC (XPC), and OS integration points.
• Explore edge cases, race conditions, compatibility scenarios, and regressions across macOS versions.
• Reproduce and isolate complex issues related to sandboxing, SIP, TCC, and daemon behavior.
• Collaborate with development, support, product, and automation teams to triage and regress bugs.
• Validate interactions between the platform and third-party macOS apps and services.
• Work with SDETs to turn exploratory tests into automation candidates.
• Maintain familiarity with macOS releases and their impact on functionality.

Skills

macOS QA

Security testing

Manual testing

XPC

SIP

Launch Services

Debug logs

Tools

Console

Activity Monitor

Instruments

fs_usage

dtrace

tcpdump

lldb

Job description

Sur in Málaga, Spain, is seeking a Senior macOS QA Engineer to validate a secure macOS platform used to protect sensitive systems. This hands-on role emphasizes manual and exploratory testing over automation, with deep knowledge of macOS internals and system behavior.

You will design test plans, investigate kernel and inter-process interactions, and collaborate with engineers and reverse engineers to ensure compatibility and security across macOS versions. English CVs are required.