Germany-Based English & German AI Generalist Trainer 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 validating model outputs to strengthen training data quality and drive model performance improvement.

About the Role

In this full-time remote role at Rexzone, you will evaluate and improve AI/LLM workflows by reviewing model-generated responses, ranking outputs, performing QA evaluation, and writing clear rationales that support model performance improvement. You will follow annotation guidelines compliance and contribute to training data quality through consistent large language model evaluation across English and German content.

Key Responsibilities

Perform large language model evaluation for English and German outputs; rank and compare responses using RLHF-style criteria; execute QA evaluation and validation checks to ensure training data quality; identify errors in reasoning, factuality, safety, and instruction-following; write concise rationales to justify rankings and evaluations; apply annotation guidelines compliance consistently and flag guideline gaps; conduct prompt evaluation and support data labeling and content safety labeling where needed; track edge cases and report recurring failure modes to improve model performance improvement.

Basic Qualifications

Must be based in Germany and authorized to work remotely from Germany. Fluent in English and German (reading and writing). Strong analytical skills, critical thinking, and attention to detail. Ability to evaluate reasoning and provide clear, structured written rationales. Comfortable working with web tools, spreadsheets, and task queues while meeting quality and throughput targets.

Preferred Qualifications

Experience with AI training data, data labeling, or annotation work. Familiarity with LLM evaluation, RLHF concepts, prompt evaluation, or QA evaluation methods. Background in linguistics, technical writing, translation, or content moderation. Self-driven, dependable, and able to follow evolving annotation guidelines compliance with minimal supervision.

How to Apply

Apply to Rexzone with a short summary of your English/German proficiency, your availability for full-time remote work from Germany, and any experience related to data labeling, QA, or large language model evaluation. Qualified candidates may be asked to complete an evaluation task focused on training data quality and ranking consistency.

Frequently Asked Questions

Q: Is this role remote?
Yes. This is a full-time remote role, and you must be based in Germany.
Q: What tasks will I do?
You will perform large language model evaluation by reviewing model outputs, ranking and comparing responses (RLHF-style), completing QA evaluation and validation, and writing rationales while following annotation guidelines compliance to improve training data quality.
Q: Do I need AI experience?
AI experience is helpful but not required. We value strong analytical skills, attention to detail, and the ability to apply guidelines consistently; training is provided for evaluation rubrics and workflows.
Q: What languages are required?
Fluency in both English and German is required, including reading and writing for prompt evaluation and response assessment.
Q: What domains are covered?
You may evaluate general knowledge, reasoning, writing quality, instruction following, and content safety labeling across a variety of consumer and professional scenarios, with an emphasis on training data quality and model performance improvement.

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.

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