Remote English Linguistic Specialist for AI Data & QA

Mercor; Greater London; Remote; GBP 35,000 - 60,000; Full time

Job summary

Mercor is seeking experienced English Linguistic Experts to join a cutting-edge AI research project in partnership with a leading research lab. This role centers on evaluating how effectively a large language model performs in English-language tasks and on curating high-quality English linguistic data to train and improve the model’s understanding and generation capabilities.

You will work remotely within a distributed team, evaluating LLM outputs across summarization, grammar correction,

Qualifications

• Native or near-native fluency in English with excellent grammar and style.
• Experience editing, proofreading, writing, linguistic annotation, or NLP data work in English.
• Strong understanding of linguistic nuances, regional variations, tone, and context-appropriate English usage.
• Excellent ability to identify subtle grammatical errors, awkward phrasing, ambiguity, and unnatural language.
• Interest in AI and LLM-driven language technologies is preferred but not required.

Responsibilities

• Evaluate the quality and accuracy of LLM-generated English text across use cases (summarization, dialogue, grammar correction, rewriting, reasoning).
• Edit, refine, or rewrite English content to meet high linguistic, stylistic, and cultural standards.
• Annotate English text for grammatical, syntactic, semantic, and stylistic features.
• Identify model errors, inconsistencies, and language gaps, and provide feedback to improve LLM performance.
• Provide detailed linguistic feedback and analysis to guide ongoing model training efforts.

Skills

English proficiency

Editing

Linguistic annotation

NLP data work

Attention to detail

Job description

Mercor is seeking experienced English Linguistic Experts to join a cutting-edge AI research project in partnership with a leading research lab. This role centers on evaluating how effectively a large language model performs in English-language tasks and on curating high-quality English linguistic data to train and improve the model’s understanding and generation capabilities.

You will work remotely within a distributed team, evaluating LLM outputs across summarization, grammar correction,