Germany-Based English & German AI Generalist Trainer 2026 May

Rexzone is hiring Germany-based AI Generalist Trainers to support large language model evaluation across English and German. You will evaluate, rank, and QA model outputs within RLHF workflows, follow annotation guidelines compliance, and write clear rationales that improve training data quality and drive model performance improvement. This remote, full-time role focuses on large language model evaluation, prompt evaluation, and validation tasks to strengthen real-world AI behavior and reliability.

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About the Role

As a Germany-based English & German AI Generalist Trainer at Rexzone, you will assess model-generated responses for correctness, helpfulness, safety, and adherence to instructions. You will perform evaluation and ranking, complete QA evaluation checks, and provide structured reasoning to support training data quality. Your work directly supports RLHF and large language model evaluation pipelines used for model performance improvement.

Responsibilities

• Evaluate and rank English and German model outputs using defined rubrics and annotation guidelines compliance. • Perform QA evaluation to identify errors, inconsistencies, and policy issues; escalate edge cases with clear evidence. • Write concise rationales explaining rankings, including reasoning focused on accuracy, relevance, and safety. • Validate prompt/response pairs, ensuring proper formatting, language quality, and instruction-following. • Apply content safety labeling and policy checks to reduce harmful, biased, or disallowed outputs. • Review labeled data for training data quality, perform spot checks, and correct labeling mistakes. • Track task progress, document decision rules, and contribute to continuous improvements in guidelines and workflows. • Support model performance improvement by flagging systematic failure modes and proposing examples for evaluation sets.

Basic Qualifications

• Must be based in Germany and authorized to work as a contractor/employee as applicable. • Fluency in English and German (reading and writing) with strong grammar and style awareness. • Strong analytical skills and structured reasoning for comparing outputs and justifying decisions. • High attention to detail, consistency, and ability to follow annotation guidelines compliance. • Comfort working with online tools, spreadsheets, and web-based labeling platforms. • Ability to handle sensitive content as part of content safety labeling tasks.

Preferred Qualifications

• Prior experience in data labeling, QA evaluation, or large language model evaluation. • Familiarity with RLHF concepts, prompt evaluation, and common LLM failure patterns (hallucinations, refusal quality, bias). • Experience writing clear rationales and applying rubrics consistently at scale. • Self-driven, reliable, and able to manage productivity in a remote setting. • Interest in AI systems, evaluation methodology, and improving training data quality.

Compensation

Pay range: $35–$40 USD per hour (hourly). Remote, full-time.

How to Apply

Apply to Rexzone with your resume/CV and a short note confirming you are based in Germany and fluent in English and German. If selected, you may complete a short evaluation to confirm annotation consistency and reasoning quality.

Frequently Asked Questions

  • Q: Is this role remote?

    Yes. This is a remote, full-time role, and you must be based in Germany.

  • Q: What tasks will I do?

    You will perform large language model evaluation tasks such as ranking model outputs, completing QA evaluation checks, validating prompt/response pairs, applying content safety labeling, and writing rationales to support training data quality and model performance improvement.

  • Q: Do I need AI experience?

    AI experience is helpful but not required. We value strong analytical skills, attention to detail, and consistent annotation guidelines compliance; training and examples are provided.

  • Q: What languages are required?

    Fluency in both English and German is required, including reading and writing at a professional level.

  • Q: What domains are covered?

    Domains vary and can include general knowledge, customer-support style interactions, reasoning tasks, summarization, instruction following, and content safety scenarios within RLHF and prompt evaluation workflows.

230+Domains Covered
120K+PhD, Specialist, Experts Onboarded
50+Countries Represented

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