Germany-Based English & German AI Generalist Trainer 2026 May

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

Job Image

About the Role

As a Germany-based English & German AI Generalist Trainer at Rexzone, you will evaluate and improve AI systems by reviewing model-generated responses and comparing alternatives using RLHF-style ranking. Your work strengthens training data quality through large language model evaluation, prompt evaluation, and QA evaluation. You will apply annotation guidelines compliance, validate edge cases, and provide well-reasoned rationales that enable model performance improvement.

Responsibilities

Perform large language model evaluation by assessing and ranking model outputs for relevance, correctness, helpfulness, and safety; Execute RLHF-style comparisons, including preference ranking and reasoned justification; Conduct QA evaluation by validating labeled data, auditing consistency, and flagging guideline gaps; Apply annotation guidelines compliance across English and German tasks, ensuring consistent interpretation and documentation; Perform reasoning and validation on ambiguous or adversarial prompts, including content safety labeling; Write clear rationales that explain decisions, highlight errors, and support model performance improvement; Track error patterns and contribute feedback to improve instructions, rubrics, and training data quality; Collaborate asynchronously with project leads to resolve disagreements and calibrate scoring standards.

Basic Qualifications

Based in Germany and authorized to work as a contractor/employee per local requirements; Fluent in English and German (reading, writing, and nuanced comprehension); Strong analytical skills with the ability to compare alternatives and justify rankings with evidence; High attention to detail and consistency, especially when following annotation guidelines compliance; Comfortable working with structured rubrics, spreadsheets/tools, and written feedback; Able to work full-time remotely with reliable internet and secure workspace.

Preferred Qualifications

Prior experience in data labeling, prompt evaluation, QA evaluation, or content safety labeling; Familiarity with LLM evaluation concepts, RLHF, and common failure modes of generative AI; Experience writing concise rationales and applying decision frameworks at scale; Self-driven, organized, and able to maintain quality under time and volume expectations; Interest in improving training data quality and contributing to model performance improvement.

Compensation

Pay rate: $35–$40 USD per hour (hourly). Full-time, remote. Final rate within the range depends on task complexity, calibration performance, and quality metrics.

How to Apply

Apply to Rexzone with your resume/CV and a brief note confirming you are based in Germany and fluent in English and German. If selected, you may complete a short language and evaluation calibration to confirm alignment with large language model evaluation standards.

Frequently Asked Questions

  • Q: Is this role remote?

    Yes. This is a full-time remote role for candidates based in Germany.

  • Q: What tasks will I do?

    You will perform large language model evaluation tasks such as evaluation, ranking, QA evaluation, reasoning-based rationales, and validation of labeled data to improve training data quality and model performance improvement.

  • Q: Do I need AI experience?

    AI experience is preferred but not required. You must be able to follow annotation guidelines compliance, apply strong analytical judgment, and produce consistent evaluations.

  • Q: What languages are required?

    Fluency in both English and German is required, including the ability to evaluate nuanced meaning and write clear rationales in both languages.

  • Q: What domains are covered?

    You will evaluate general-domain prompts and responses, including reasoning, instruction-following, summarization, and content safety labeling scenarios, depending on project needs.

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

Industry-Leading Compensation

We believe exceptional intelligence deserves exceptional pay. Our platform consistently offers rates above the industry average, rewarding experts for their true value and real impact on frontier AI. Here, your expertise isn't just appreciated - it's properly compensated.

Work Remotely, Work Freely

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.

Respect at the Core of Everything

AI trainers are the heart of our company. We treat every expert with trust, humanity, and genuine appreciation. From personalized support to transparent communication, we build long-term relationships rooted in respect and care.

Ready to Shape the Future of AI Data Operations?

Apply Now.