Germany-Based English & German AI Generalist Trainer (Remote, Full-Time) 2026 May

Rexzone is hiring Germany-based bilingual (English/German) AI Generalist Trainers to support RLHF and large language model evaluation by assessing, ranking, and QA-checking model outputs to strengthen training data quality and drive 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 workflows by reviewing model-generated responses, ranking alternatives, validating factuality and safety, and writing clear rationales. Your work directly supports RLHF, training data quality, annotation guidelines compliance, and consistent large language model evaluation used to deliver measurable model performance improvement.

Key Responsibilities

Evaluate and rank model-generated outputs in English and German; perform QA evaluation to verify annotation guidelines compliance; write reasoning-focused rationales that justify rankings and corrections; validate data for consistency, completeness, and content safety labeling requirements; flag errors, ambiguity, and policy risks, and propose guideline clarifications; contribute to prompt evaluation by testing instructions and identifying failure modes; track quality issues and support training data quality audits to enable model performance improvement.

Basic Qualifications

Must be based in Germany and authorized to work there; fluent in English and German (reading, writing, and nuanced judgment); strong analytical skills with the ability to compare outputs and explain reasoning; exceptional attention to detail to ensure training data quality and annotation guidelines compliance; ability to follow structured evaluation rubrics and maintain consistent QA evaluation outcomes; comfortable working independently in a remote, full-time environment.

Preferred Qualifications

Prior experience with data labeling, RLHF-style ranking, or large language model evaluation; familiarity with LLM behaviors (hallucinations, instruction following, safety refusal patterns) and prompt evaluation methods; experience applying annotation guidelines and conducting validation/QA checks; self-driven, organized, and able to manage throughput while maintaining training data quality.

Compensation

Pay is $35–$40 USD per hour (hourly). Exact rate depends on task complexity and demonstrated evaluation quality.

How to Apply

Apply to Rexzone with a resume/CV highlighting bilingual English/German writing skills and any evaluation, QA, annotation, or AI-related experience. Selected candidates may complete a short language and large language model evaluation assessment.

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 work such as evaluation and ranking of model outputs, QA evaluation and validation against annotation guidelines, prompt evaluation, and writing short rationales that support training data quality and model performance improvement.

  • Q: Do I need AI experience?

    AI experience is helpful but not required. You do need strong analytical skills, attention to detail, and the ability to follow annotation guidelines compliance standards; training is provided for the evaluation framework.

  • Q: What languages are required?

    Fluent English and German are required, including the ability to read and write with nuance for ranking, reasoning, and QA decisions.

  • Q: What domains are covered?

    Domains vary and can include general knowledge, writing quality, instruction following, content safety labeling, and other areas relevant to RLHF and training data quality for model performance improvement.

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

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