Germany-Based English & German AI Generalist Trainer 2026 May

Rexzone is hiring Germany-based AI Generalist Trainers to support AI/LLM workflows through RLHF, large language model evaluation, and training data quality improvements. You will evaluate, rank, and QA model outputs in English and German, write clear rationales, and follow annotation guidelines compliance to drive model performance improvement.

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About the Role

As a Germany-based English & German AI Generalist Trainer at Rexzone, you will assess model-generated responses across multiple domains, perform large language model evaluation, and contribute to RLHF by ranking outputs and providing reasoning-focused feedback. Your work directly impacts training data quality, annotation guidelines compliance, and model performance improvement in production AI/LLM workflows.

Key Responsibilities

Evaluate and rank model-generated outputs in English and German using task-specific rubrics; perform QA evaluation to validate accuracy, completeness, and policy alignment; write concise rationales that explain reasoning and ranking decisions; validate data labeling outputs and ensure annotation guidelines compliance; review edge cases, flag ambiguity, and propose guideline clarifications to improve training data quality; conduct prompt evaluation and response evaluation for safety, helpfulness, and factuality; complete content safety labeling when required and document decisions for auditability.

Basic Qualifications

Must be based in Germany and eligible to work as a remote contractor/employee as applicable; fluent in German and English (written and spoken) with strong comparative language judgment; strong analytical skills with the ability to evaluate reasoning quality and detect subtle errors; exceptional attention to detail and consistency when following annotation guidelines; ability to manage time independently and meet quality and throughput expectations in a remote setting.

Preferred Qualifications

Prior experience in AI data labeling, LLM evaluation, RLHF, prompt evaluation, or QA evaluation; familiarity with large language model behaviors (hallucinations, instruction following, safety constraints) and model performance improvement methods; experience writing clear justifications and applying rubrics across varied content domains; self-driven, proactive communicator who can handle ambiguity and propose improvements to workflows and guidelines.

Compensation

USD $35–$40 per hour, depending on skills and performance during onboarding and calibration.

How to Apply

Apply to Rexzone with your resume/CV and a brief note confirming Germany-based location and English/German fluency. Highlight any experience with evaluation, ranking, QA, validation, annotation guidelines, or AI/LLM projects.

Frequently Asked Questions

  • Q: Is this role remote?

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

  • Q: What tasks will I do?

    You will perform large language model evaluation tasks including evaluation, ranking, QA evaluation, validation of labeled data, prompt evaluation, and writing rationales to support RLHF and training data quality.

  • Q: Do I need AI experience?

    AI experience is helpful but not always required. Strong analytical skills, attention to detail, and the ability to follow annotation guidelines compliance are essential; we provide role-specific calibration and guidance.

  • Q: What languages are required?

    Fluency in both German and English (written and spoken) is required.

  • Q: What domains are covered?

    You will evaluate model outputs across varied domains such as general knowledge, writing quality, instruction following, reasoning, content safety labeling, and policy-aligned responses, depending on project needs.

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

Industry-Leading Compensation

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