Machine Learning Engineer (AI Data Trainer)
About The Role
What if your technical expertise could directly influence how the world's most advanced AI systems learn to reason, plan, and solve problems? We're looking for Machine Learning Engineers to help train cutting-edge AI models by demonstrating expert-level problem-solving — step by step, tool by tool, decision by decision.
Machine Learning Engineer (AI Data Trainer)
About The Role
What if your technical expertise could directly influence how the world's most advanced AI systems learn to reason, plan, and solve problems? We're looking for Machine Learning Engineers to help train cutting-edge AI models by demonstrating expert-level problem-solving — step by step, tool by tool, decision by decision.
This isn't a typical ML engineering role. You'll be working at the frontier of AI development, producing the high-quality reasoning data that teaches large language models how to think like an expert. Your work will have a direct, lasting impact on how AI handles real-world technical challenges.
This is a fully remote,



versátil contract role built for experienced technical professionals who want to contribute to something genuinely significant.
- Organization: Alignerr
- Type: Hourly Contract
- Location: Remote
- Commitment: 10–40 hours/week

What You'll Do
- Construct precise, well-structured reasoning logs that walk through complex technical problems — capturing your strategy, tool use, and decision‑making at each step
- Demonstrate how an expert approaches sophisticated ML and engineering challenges, producing training data that shows AI models how to reason consistently and reliably
- Generate annotated workflows that illustrate proficient tool interaction, from problem framing through to solution execution
- Review and critically evaluate AI‑generated reasoning sequences, identifying gaps, errors, and opportunities for improvement
- Produce high‑quality training datasets that directly improve LLM performance on re

📌 Machine Learning Engineer (España)
🏢 Alignerr
📍 España