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Data & AI

Data Scientist cover letter example

A complete letter from Marcus Kim to SynthAI Labs. Read it in full, see what makes it work, then open it in the builder and replace the details with your own.

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Full cover letter

Marcus Kim

Senior Data Scientist · Seattle, WA · marcus.kim@example.com

October 10, 2026

Dr. Evelyn Reed
Director of AI Research, SynthAI Labs
1201 3rd Ave, Seattle, WA 98101

Dear Dr. Reed,

I am writing to express my passionate interest in the Senior Data Scientist position at SynthAI Labs. SynthAI's pioneering work in generative modeling and real-time inference optimization represents exactly the type of mission-critical engineering I am driven to pursue.

During my four years as a Machine Learning Engineer at Apex Data Systems, I led the production deployment of deep learning recommendation models serving over 20M users. Our models boosted user session duration by 31% and lowered inference costs by 38% through quantization and model distillation.

I am eager to leverage my rigorous background in statistical modeling, NLP, and distributed training to help SynthAI Labs achieve its vision. Thank you for your consideration, and I look forward to an opportunity to speak.

Sincerely,

Marcus Kim

Why this letter works

  • Says the models reached production and how many users they serve.
  • Reports both a product metric (31% longer sessions) and a cost metric (38% cheaper inference).
  • Names the methods, quantization and distillation, so a technical reader can judge depth.

Make it yours

  1. Swap in the hiring manager's name and one specific thing about the company you actually admire.
  2. Replace the numbers with your own results. Keep one growth metric and one efficiency or quality metric.
  3. Keep it under one page, then check your resume against the same job with the ATS checker.