Germany-Based English & German AI Generalist Trainer 2026 May

Rexzone is hiring Germany-based AI Generalist Trainers to support RLHF and large language model evaluation by reviewing, ranking, and validating model-generated 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 assessing model responses, ranking alternatives, performing QA evaluation, and writing clear rationales. Your work directly impacts training data quality through consistent annotation guidelines compliance, safety-aware judgments, and careful validation of edge cases. This is a remote, full-time role for candidates based in Germany with fluent German and English.

Responsibilities

Perform large language model evaluation across German and English tasks; rank and compare multiple model outputs using defined rubrics; execute RLHF-style preference judgments and prompt evaluation; write concise, evidence-based rationales that capture reasoning and policy alignment; perform QA evaluation to validate labels, detect inconsistencies, and ensure annotation guidelines compliance; apply content safety labeling where required (toxicity, self-harm, hate, sexual content, sensitive data); validate challenging edge cases and escalate unclear instructions to improve guidelines; maintain training data quality by documenting decisions and following structured workflows; collaborate asynchronously with reviewers and operations to drive model performance improvement.

Basic Qualifications

Based in Germany and authorized to work from Germany; fluent in German and English (reading and writing); strong analytical skills with the ability to evaluate nuanced language and reasoning; exceptional attention to detail and consistency in applying rubrics; comfortable following annotation guidelines and providing clear justifications; reliable internet connection and ability to work independently in a remote environment.

Preferred Qualifications

Experience with data labeling, prompt evaluation, or QA evaluation in AI/ML programs; familiarity with LLM behavior, RLHF concepts, or evaluation frameworks; background in linguistics, translation, editorial review, customer support quality, or similar analytical writing work; self-driven, organized, and able to manage time across multiple queues while maintaining training data quality.

Compensation

USD $35–$40 per hour (hourly).

How to Apply

Apply to Rexzone with an updated CV and a brief summary of your German/English proficiency and any relevant evaluation, QA, or annotation experience. Selected candidates may complete a short assessment focused on ranking, reasoning, and annotation guidelines compliance.

Frequently Asked Questions

  • Q: Is this role remote?

    Yes. The role is remote, but you must be based in Germany.

  • Q: What tasks will I do?

    You will perform large language model evaluation, rank model-generated outputs, complete RLHF-style preference judgments, write rationales, and run QA evaluation/validation to protect training data quality and support 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 is provided for our evaluation workflows.

  • Q: What languages are required?

    Fluency in both German and English is required (reading and writing).

  • Q: What domains are covered?

    Domains vary and can include general knowledge, reasoning, instruction following, content safety labeling, and helpfulness/harmlessness checks, with an emphasis on training data quality for bilingual AI/LLM systems.

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

Industry-Leading Compensation

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