Senior QA Engineer - Desktop and Distributed Systems - Remote

Overview

Our Client is a US based security company looking for a Senior QA Engineer who thrives in complex, highly technical environments.

In Short

• Define, own, and execute comprehensive test strategies across backend services, web frontends, and desktop apps on both Windows and macOS.
• Validate distributed system behaviors, including state synchronization, persistence, fault tolerance, and security guarantees.
• Create detailed, well-researched test plans and cases based on low-level system behavior, API contracts, and desktop workflows.
• Design and implement automation where appropriate (API/integration/UI level).
• Partner closely with development teams to catch issues early through ATDD or early exploratory testing.
• Contribute to reproducibility efforts for complex bugs (across platforms), including writing minimal repro apps or network mocks.
• Drive quality in high-scale systems composed of dozens of backend services and desktop agents.
• Maintain test environments and make sure they are evolving with requirements as they change.

Requirements

• Experience in manual and automated testing.
• Strong understanding of .NET, C++, and React technologies.
• Ability to reverse-engineer bugs and think like an attacker or power user.
• Experience with test strategies for distributed systems.
• Knowledge of stateful client/server behavior.
• Ability to design and implement test automation.
• Strong collaboration skills with development teams.
• Experience in maintaining test environments.

Benefits

• Opportunity to work in a complex technical environment.
• Collaborate with talented teams.
• Contribute to the security of applications.
• Career growth opportunities.