Senior ML Engineer - AI Data Trainer (Remote)

Alignerr

📍 remoto, remoto, Spain

Full-time Other-General Posted February 24, 2026

Job Description

A leading AI consultancy in Spain is seeking a Senior Machine Learning Engineer - AI Data Trainer to lead the authorship of complex reasoning traces for advanced AI models. You will mentor annotators and design strategies for LLMs in real-world scenarios. The ideal candidate should possess significant experience in Machine Learning and related fields, with a proven ability to document complex tasks. This role offers competitive hourly compensation and flexible remote work with potential for contract extension.
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