About the job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey.

Position: Litigation Lawyer (Spain) Type: Contract Compensation: $140–$150/hour Location: Remote Commitment: ~10 hours
Role Responsibilities Evaluate AI-generated responses by running the same prompts across two AI (LLM) platforms .
Compare outputs from both platforms side by side to ensure accuracy and consistency.
Score each response against a standardized rubric provided by the team.
Submit concise written feedback for every evaluation to improve AI model performance .




Work independently and adhere to deadlines while maintaining high-quality standards.
Qualifications Must-Have Primarily law-firm experience — at least 2 years (3+ preferred) in litigation, disputes, or contentious practice.
Qualified to practise in Spain (colegiado/a) with a strong command of Spanish litigation and procedural law.
Native or fluent Spanish , with precise written communication.

Ability to work independently to a rubric and meet deadlines.

Compensation & Legal Confidentiality: all work is covered by NDA

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📌 Disputes Lawyer - AI Trainer (Barcelona)
🏢 Mercor
📍 Barcelona