Energy & Utilities
Senior Test Automation Engineer (m/f/d)
Key facts
- Start
- 08/2026
- Duration
- 5 months
- Work mode
- Remote
- Location
- Cologne
- Workload
- 100 %
- Contract type
- Freelance · Expert
Project description
We are seeking a Senior Test Automation Engineer / QA Automation Lead (m/f/d) for an established company in the healthcare software sector (B2B, ranging from medium-sized enterprises to large corporations) who will be responsible for end-to-end test strategies and will sustainably expand scalable test automation using C++ desktop, .NET, and web.
Responsibilities
- Design and ownership of a comprehensive, multi-tiered testing strategy (unit, integration, system, UI, stress, performance), including measurable quality goals
- Development and refinement of robust test harnesses and CI pipelines that detect regressions early and deliver fast, reliable feedback cycles
- Test automation across heterogeneous environments: C++ desktop, .NET, and web components—including test data and environment management
- Design, execution, and evaluation of stress and performance tests; identification of bottlenecks, leaks, and stability risks, including concrete improvement measures
- Establishment of “shift-left” and TDD-oriented QA practices in collaboration with Engineering (testability, Definition of Done, quality gates)
- Close collaboration with Development, Architecture, QA, and Product Management to prioritize quality-critical risks and ensure release readiness
- Standardization and scaling of test tooling, reporting, and flake reduction (stabilizing unstable tests, root cause analysis, sustainable fixes)
- Use of AI coding agents (e.g., Claude Code) to generate, maintain, and triage tests, as well as to build reusable QA workflows, skills, and prompt templates for the team
Requirements
Must-have
These criteria are required for the project.
- Must-have: Several years of experience in senior test automation with a solid understanding of multi-tier test architectures (pyramid, contract tests, E2E strategies)
- Must-have: Solid practical experience in stress and performance testing (load profiles, metrics, bottleneck analysis, stability assessments)
- Must-have: Very strong programming skills in at least one of the following languages: C#, Java, Python, or TypeScript
- Must-have: Hands-on experience with CI/CD (e.g., GitLab CI or similar), version control (Git), and modern testing tools (e.g., Ranorex, Playwright, Cypress)
- Must-have: Strong problem-solving orientation, analytical approach, and a “quality-first” mindset (root cause rather than workarounds)
- Desirable: Strong C# skills and expertise in penetration testing and security testing
- Desirable: ISTQB or comparable certification
- Desirable: Experience with agent-based tools (e.g., Claude Code), setting up agents/skills/workflows, and “context engineering”
- Desirable: Experience in regulated environments (healthcare, medtech) and an understanding of compliance and documentation requirements
Skills
- Testautomatisierung
- Performance-Tests
- CI/CD
- GitLab CI
- C#
- ISTQB
After you apply
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