A Prompt Engineer cover letter that gets read.

Dear Hiring Manager, I'm writing to apply for the Prompt Engineer position on your Data & AI team. Over the past [X years], I've developed a strong foundation in crafting effective prompts for large language models, optimizing outputs across retrieval-augmented generation (RAG) systems, and collaborating with data scientists to evaluate model responses. At [Company], I worked on [specific achievement—e.g., "reducing hallucination rates by 34% through systematic prompt iteration and instruction refinement"], which taught me how small tweaks in phrasing and context significantly impact model performance and user experience. My technical work includes structuring prompts for semantic consistency, designing chain-of-thought frameworks for complex tasks, and testing guardrails to identify edge cases. I'm comfortable working with API-based models (GPT, Claude, Llama) and have experience measuring prompt effectiveness through metrics like BLEU scores, user satisfaction, and task completion rates. I understand the iterative nature of this role—that prompts require continuous evaluation against real-world usage patterns and that documentation is as critical as the prompts themselves. I'm drawn to your team because [specific reason tied to company's AI products or approach]. I'm excited to bring hands-on prompt development skills and a methodical approach to building systems that scale reliably. Thank you for considering my application. Best regards, [Your Name]