AI Model Evaluator

About Mercor

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.

This is a full-time or part-time contract opportunity for an AI Model Evaluator.

Compensation is $41 per hour, with work geographically restricted to Israel and the USA.

Role Responsibilities

• Evaluate LLM-generated responses for effectiveness in answering user queries.
• Conduct fact-checking using trusted public sources and external tools.
• Generate high-quality human evaluation data by annotating response strengths, areas for improvement, and factual inaccuracies.
• Assess reasoning quality, clarity, tone, and completeness of responses.
• Ensure model responses align with expected conversational behavior and system guidelines.
• Apply consistent annotations by following clear taxonomies, benchmarks, and detailed evaluation guidelines.

Qualifications

Must-Have

• Bachelor’s degree
• Native speaker or ILR 5/primary fluency (C2 on the CEFR scale) in Hebrew
• Significant experience using large language models (LLMs)
• Excellent writing skills
• Strong attention to detail
• Adaptable across topics, domains, and customer requirements
• Background in domains requiring structured analytical thinking
• Excellent college-level mathematics skills

Preferred

• Experience with RLHF, model evaluation, or data annotation work
• Experience writing or editing high-quality written content
• Experience comparing multiple outputs and making fine-grained qualitative judgments
• Familiarity with evaluation rubrics, benchmarks, or quality scoring systems

Compensation & Legal

• Hourly contractor
• Paid weekly via Stripe Connect

Key skills/competency

• LLM Evaluation
• Fact-Checking
• Data Annotation
• Content Review
• Natural Language Processing
• Analytical Thinking
• Hebrew Fluency
• Writing Skills
• Attention to Detail
• AI Models