Germany-Based English & German AI Generalist Trainer 2026 May

Rexzone is hiring Germany-based, bilingual English/German AI Generalist Trainers to support large language model evaluation through RLHF, prompt evaluation, and training data quality work that drives model performance improvement.

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About the Role

As a Germany-based English & German AI Generalist Trainer at Rexzone, you will evaluate and improve AI/LLM systems by reviewing, ranking, and validating model-generated outputs. This remote, full-time role supports RLHF workflows, large language model evaluation, and training data quality initiatives. You will follow annotation guidelines compliance standards, write clear rationales for decisions, and perform QA evaluation to ensure reliable datasets that enable model performance improvement.

Key Responsibilities

Evaluate and rank model responses in English and German using defined rubrics and annotation guidelines compliance; perform prompt evaluation and RLHF-style preference ranking to support training data quality; complete QA evaluation checks, validate edge cases, and flag inconsistencies or policy risks; write concise, evidence-based reasoning and rationales to justify rankings and corrections; apply content safety labeling and policy-based review where required; track errors, propose guideline clarifications, and support calibration to improve inter-annotator agreement; document decisions and maintain high data labeling accuracy across repeated validation rounds.

Basic Qualifications

Must be based in Germany and authorized to work as a remote contractor/worker; fluent in English and German (C1+ or equivalent) with strong written communication in both; strong analytical skills and attention to detail for systematic evaluation, ranking, and validation; ability to follow detailed instructions and meet annotation guidelines compliance requirements; comfort working with ambiguous language tasks and applying consistent judgment across large language model evaluation workflows.

Preferred Qualifications

Prior experience in data labeling, prompt evaluation, QA evaluation, or RLHF-related tasks; familiarity with LLM evaluation concepts (helpfulness, correctness, safety, groundedness) and common failure modes; experience writing structured rationales and applying content safety labeling policies; self-driven, reliable, and able to maintain quality and throughput in remote work.

How to Apply

Apply to Rexzone with a short summary of your bilingual English/German experience, Germany location, and any relevant evaluation, annotation, or QA background. If selected, you will complete a brief skills assessment focused on ranking, reasoning, and training data 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 response evaluation, ranking, prompt evaluation, QA evaluation, validation, and writing rationales to support RLHF and training data quality.

  • Q: Do I need AI experience?

    AI experience is helpful but not required. We provide guidelines and calibration; strong analytical skills and attention to detail are essential.

  • Q: What languages are required?

    Fluency in both English and German is required because you will evaluate and write rationales in both languages.

  • Q: What domains are covered?

    Tasks may cover general knowledge, reasoning, writing quality, instruction-following, and content safety labeling, depending on project needs and annotation guidelines.

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

Industry-Leading Compensation

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No office. No commute. No constraints. Our fully remote workflow gives experts complete flexibility to work at their own pace, from any country, any time zone. You focus on meaningful tasks - we handle the rest.

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