Quality Engineer – QShield (Cybersecurity Products)

About Quarkslab

Quarkslab builds cutting-edge cybersecurity solutions used by security-driven companies and institutions around the world. Our QShield product suite focuses on software protection and reverse engineering resistance across desktop, mobile, and embedded platforms.

We’re not in the cloud - we build real software, tested on real systems. If you enjoy diving deep into complex technical environments, automating smart test coverage, and owning quality end-to-end, read on.

Description du poste

Your Mission

We’re looking for a Quality Engineer to own, drive, and evolve the testing strategy for QShield products. You’ll take the lead on functional and integration test automation, and ensure engineers uphold a high standard of testing. This role blends technical depth, test architecture, and education - you’ll be the quality ambassador across multiple products and platforms.

What You’ll Do

Lead Test Strategy

• Define and implement strategies for functional and integration testing.
• Continuously evaluate and improve test coverage (we have over 1000+ tests).
• Identify gaps, deadweight, and flaky tests and fix them.

Spread the Quality Culture

• Guide and support developers in writing and maintaining effective tests.
• Help teams adopt best practices in automated testing and test-driven development.
• Act as a reference point for all QA-related matters across product teams.

Dig Deep Into Complex Systems

• Work closely with engineers to understand product internals.
• Reproduce bugs, build regression tests, and support issue triage.
• Ensure our products are robust across updates and across environments.

Our Tech Stack

Languages & Tools:

• LIT (LLVM’s test format)
• Python
• C/C++ and Java (nice to have for deeper integration)

Operating Systems:

• Linux
• Windows
• macOS
• Android
• iOS

Build Toolchains:

• CMake
• Java (Maven, Gradle)
• MSVC / Xcode
• Android NDK/SDK (occasionally)

Profil recherché

• Solid experience designing and maintaining automated test frameworks.
• Strong Python skills, especially for tooling, scripting, or test orchestration.
• Comfortable working across OSes (Linux, Windows, macOS).
• A structured and autonomous mindset, able to take ownership of test infrastructure.
• Great communication skills and willingness to mentor engineers.
• Curious and rigorous - you don’t stop at "it works on my machine."

Nice to Have

• Background in product testing or software QA in B2B environments.
• Familiarity with cybersecurity, reverse engineering, or software protection.
• Bonus points for C++ or Java knowledge - not mandatory but helpful.
• adminsys/cross-platform development

Why Join Us?

• Take ownership of quality in mission-critical security products.
• Collaborate with a team of brilliant engineers and security researchers.
• Shape your tooling and test architecture - your decisions will matter.
• Work on meaningful tech, with a human-sized team and international outlook.
• Flexible work environment, whether you're near Paris or remote (in France).