Germany-Based English & German AI Generalist Trainer 2026 May

Rexzone is hiring Germany-based AI Generalist Trainers to support large language model evaluation through RLHF, ranking, QA evaluation, and rationale writing to improve training data quality and drive model performance improvement.

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-generated outputs, ranking responses, and writing clear rationales aligned to annotation guidelines compliance. Your work directly impacts training data quality, large language model evaluation, and model performance improvement through RLHF and structured feedback.

Key Responsibilities

Perform large language model evaluation by comparing and ranking model responses; execute QA evaluation to validate labeling accuracy and annotation guidelines compliance; write concise reasoning and rationales that justify rankings and highlight errors; validate outputs for factuality, safety, tone, and instruction-following, including content safety labeling; run prompt evaluation and identify failure modes to support model performance improvement; follow workflows for data labeling, training data quality checks, and escalation of ambiguous cases; document edge cases and contribute to guideline updates to improve consistency and reduce variance; maintain productivity and quality targets while working independently in a remote environment.

Basic Qualifications

Based in Germany and eligible to work remotely from Germany; fluent in both German and English (reading, writing, and nuanced comprehension); strong analytical skills with the ability to apply rubrics consistently; high attention to detail for training data quality, evaluation, and validation tasks; ability to communicate clear reasoning in written rationales; reliable internet, availability for full-time work, and comfort operating in structured QA processes.

Preferred Qualifications

Prior experience in AI data labeling, LLM evaluation, RLHF, or similar annotation workflows; familiarity with prompt evaluation, ranking methodologies, and QA evaluation frameworks; comfort working with annotation guidelines and improving annotation guidelines compliance; self-driven, able to manage time independently, and proactive in raising issues and proposing improvements; interest in content safety labeling and policy-aware decision making.

How to Apply

Apply to Rexzone with a resume and a brief note describing your experience with evaluation, ranking, QA, and bilingual (English/German) work. Candidates may complete a short skills assessment focused on large language model evaluation and rationale writing.

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, including prompt evaluation, response ranking, QA evaluation, validation against annotation guidelines, content safety labeling when required, and writing reasoning-based rationales to improve training data quality.
Q: Do I need AI experience?
AI/annotation experience is preferred but not required. We value strong analytical skills, attention to detail, and your ability to follow rubrics and produce clear rationales.
Q: What languages are required?
Fluency in both German and English is required for reading, writing, and nuanced evaluation of model outputs.
Q: What domains are covered?
You may evaluate outputs across general knowledge, writing quality, instruction following, reasoning, and safety-related scenarios, with a focus on RLHF-style feedback 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.

Ready to Shape the Future of AI Data Operations?

Apply Now.