ControlExpert GmbH

QA Engineer

• Design and execute test cases for AI agent workflows (multi-step reasoning, tool usage, decision flows)
• Validate outputs of LLM-based systems for correctness and consistency
• Test end-to-end agentic pipelines
• Identify edge cases, hallucinations, and failure modes
• Support evaluation of prompts and agent configurations
• Assist in building automated test suites using Python or Playwright
• Collaborate with developers and AI engineers
• Document test results and recommendations for improvement

Working Student QA Engineer – AI, LLM Systems

Security Engineer

• Operate and continuously improve the cyber security posture of ControlExpert’s on-prem and partially cloud environments
• Act hands-on in incident response, vulnerability management, endpoint security and operational security engineering
• Security incident triage, investigation, and response (incl. external SOC 24/7 coordination)
• Forensic investigations and root cause analysis
• Endpoint security rollout and onboarding of new environments and clients
• Vulnerability Management: CVE assessment and prioritization, Dispatching remediation actions to responsible teams and tracking mitigation and closure
• Review of external security findings (e.g. Bitsight, penetrations tests)
• Operational security consulting for internal product and platform teams
• Continuous improvement of operational security processes and tooling
• Support onboarding and mentoring of junior engineers
• Contribution to selected group initiatives (e.g. IAM, shared service preparation)

Working Student QA Engineer – AI, LLM Systems

Senior Cyber Security Engineer