Senior macOS QA Engineer — Security & System Internals

Sur; United States; Remote; USD 66,000 - 79,000; Full time

Benefits offered by this job

PTO

Holidays

Job summary

Sur 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 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,

Qualifications

• 5+ years QA experience with macOS apps, focusing on security and compatibility.
• Deep knowledge of macOS internals, including System Extensions, Endpoint Security, XPC, TCC, SIP, and Launch Services.
• Ability to read crash reports and debug logs and identify root causes.

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.

Skills

macOS QA

Security testing

System internals

Manual testing

XPC

TCC

SIP

Launch Services

Tools

Console

Activity Monitor

Instruments

fs_usage

dtrace

tcpdump

lldb

Job description

Sur 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 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,