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

Rexzone is hiring Germany-based 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 work in AI/LLM workflows focused on RLHF, large language model evaluation, and training data quality. You will evaluate and rank model-generated responses, write clear rationales, and perform QA evaluation and validation against annotation guidelines compliance. This is a remote, full-time role requiring fluent English and German and strong analytical judgment to support model performance improvement.

Key Responsibilities

Evaluate and rank model-generated outputs across English and German tasks; perform QA evaluation and validation to ensure training data quality; write concise reasoning and rationales that justify rankings and corrections; follow and enforce annotation guidelines compliance, escalating ambiguities and proposing guideline updates; conduct prompt evaluation and adversarial checks for correctness, relevance, and helpfulness; label and review content safety labeling decisions (policy-based) and document edge cases; track errors, annotate root causes, and suggest improvements that support model performance improvement; collaborate with leads to calibrate scoring, align standards, and maintain high inter-annotator agreement.

Basic Qualifications

Based in Germany and authorized to work from Germany; fluent in English and German (written and reading comprehension required); strong analytical skills with the ability to compare outputs and select best answers using consistent criteria; exceptional attention to detail and comfort following detailed annotation guidelines; ability to explain reasoning clearly and consistently in written rationales; reliable workflow discipline in a remote environment (time management, documentation, and responsiveness).

Preferred Qualifications

Prior experience with data labeling, QA evaluation, or content review; familiarity with LLM evaluation, RLHF concepts, prompt evaluation, or rubric-based ranking; comfort learning new domains quickly and applying structured reasoning; self-driven, quality-focused, and able to work independently while maintaining annotation guidelines compliance.

Compensation

USD $35–$40 per hour (hourly).

How to Apply

Apply to Rexzone with a short summary of your English/German proficiency, Germany-based availability, and any experience with evaluation, QA, or annotation work. Qualified candidates may be asked to complete a brief skills calibration to confirm readiness for large language model evaluation tasks.

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 evaluate, rank, and QA-check model outputs, write reasoning/rationales, perform validation against guidelines, and support training data quality improvements in large language model evaluation workflows (including RLHF-style preference ranking).

  • Q: Do I need AI experience?

    AI experience is helpful but not required. Strong analytical judgment, attention to detail, and the ability to follow annotation guidelines compliance are essential; we provide task guidelines and calibration.

  • Q: What languages are required?

    Fluent English and German are required, since tasks include bilingual evaluation and ranking.

  • Q: What domains are covered?

    Domains vary and may include general knowledge, writing quality, instruction following, reasoning, helpfulness, and content safety labeling, all aimed at improving training data quality and model performance improvement.

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

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