Working Student QA Engineer – AI, LLM Systems

ControlExpert GmbH

Working Student QA Engineer focusing on AI systems and large language models at ControlExpert in Langenfeld, supporting test case design and execution.

Posted 6/24/2026part-timeLangenfeld • 🇩🇪 GermanyEntry LevelWebsite

Tech Stack

Tools & technologies

AWSPythonTypeScript

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

Currently studying Computer Science, AI, Data Science, or a related field
Basic understanding of software testing / QA principles and a strong interest in AI, LLMs, or agent-based systems
Experience with Python or TypeScript and initial exposure to AWS (e.g., Bedrock), APIs, or test automation tools
Analytical mindset, attention to detail, and curiosity about how AI systems reason and fail
Good communication skills in German and English

Benefits

Comp & perks

Flexible working hours with up to 60% remote work
Fitness and wellness benefits via Urban Sports Club
Numerous employee events (sports activities, after-work meetups, parties, ...)
On-site kitchen offering a tasty lunch at a reasonable price
Attractive discounts and vouchers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

software testingQA principlesPythonTypeScripttest automationAILLMsmulti-step reasoningtool usagedecision flows

Soft Skills

analytical mindsetattention to detailcuriositygood communication skills