Data Annotation Specialist
Mercor
Job Overview
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Job Description
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.
Position: Data Annotation Specialist
This role is offered as Full-time or Part-time Contract Work with compensation at $18/hour. The position is geography restricted to Mexico and USA.
Role Responsibilities
- Evaluate LLM-generated responses on their ability to effectively answer 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 Spanish
- Significant experience using large language models (LLMs)
- Excellent writing skills
- Strong attention to detail
- Adaptable and comfortable moving across topics, domains, and customer requirements
- Background or experience in domains requiring structured analytical thinking
- Excellent college-level mathematics skills
Preferred
- Prior 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
Application Process
The application process takes approximately 20–30 minutes to complete:
- Upload resume
- Complete AI interview based on your resume
- Submit form
Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.
Resources & Support
For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome/welcome
For any help or support, reach out to: support@mercor.com
Key skills/competency
- LLM Evaluation
- Fact-Checking
- Data Annotation
- Spanish Fluency
- Analytical Thinking
- Attention to Detail
- Writing Skills
- AI Model Assessment
- Conversational AI
- Taxonomy Adherence
How to Get Hired at Mercor
- Research Mercor's mission: Study their commitment to connecting talent with leading AI labs and their investor backing.
- Tailor your resume: Highlight experience with LLMs, data annotation, and Spanish fluency specifically for Mercor's AI Model Evaluator role.
- Master the AI interview: Prepare for questions based on your resume and demonstrate strong analytical and communication skills.
- Showcase attention to detail: Emphasize your ability to follow complex guidelines and conduct thorough fact-checking.
- Demonstrate adaptability: Be ready to discuss your experience working across various domains and customer requirements.
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