Senior macOS QA Engineer: Security & System Testing

Sur Global; Polska; On-site; PLN 259,000 - 311,000; Full time

Benefits offered by this job

PTO and holidays

CVs in English only

Job summary

Sur Global is seeking a Senior macOS QA Engineer to validate the stability, security, and compatibility of a secure macOS platform used to protect sensitive systems. This hands-on role emphasizes manual testing and deep knowledge of macOS internals and security features.

You will design and execute test plans, explore edge cases, and collaborate with cross-functional teams to triage and resolve issues while keeping pace with macOS releases.

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, 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 like VPNs, endpoint security tools, or antivirus software.

Responsibilities

• Test macOS security features across system extensions, Endpoint Security, and Network Extension frameworks.
• Design and execute manual test plans for system extensions, inter-process communication (XPC), and OS integration points.
• Explore edge cases, race conditions, compatibility scenarios, and regressions across macOS versions.
• Reproduce and isolate issues related to sandboxing, SIP and TCC interactions, Launch Services, and daemon behaviors.
• Collaborate 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.
• Work with SDETs to turn exploratory and regression cases into automation candidates.

Skills

macOS internals

System Extensions

XPC

TCC

SIP

Launch Services

File systems

Diagnostics tools

Tools

Console

Activity Monitor

Instruments

fs_usage

dtrace

tcpdump

lldb

Job description

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. This is a hands-on manual and exploratory QA role (not an automation role) that requires deep, practical experience with macOS internals, system extensions, and application behavior. You will work alongside a highly experienced 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.

If you thrive on identifying edge cases, love all things macOS, enjoy breaking complex systems in controlled ways, and have an investigative mindset for system behavior, this role is for you.

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 (XPC), 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
• Availability to work during US Eastern Time (EST) business hours
  
  

Benefits

• Compensation: $6,500 USD per month
• PTO and holidays
• Only CVs submitted in English will be considered **