Machine Learning Engineer cover letter example
A good cover letter is short and specific: why this role, why you, and why this employer. Here is a complete example for a machine learning engineer applying for “Senior Machine Learning Engineer, Personalisation”, written to go with our machine learning engineer resume example.
Arjun Mehta
Bengaluru, India arjun.mehta@example.com
Tidewell Travel
Remote (India) with visits to Gurugram
Re: Senior Machine Learning Engineer, Personalisation
Dear Hiring Team,
I am applying for the Senior Machine Learning Engineer role in your Personalisation team. I have five years of experience building ranking and recommendation models and, just as importantly, keeping them reliable in production.
At Kirana Cart I rebuilt our search ranking model, which lifted add-to-cart rate by 6% in a controlled A/B test. I also moved nine models onto a shared training and serving pipeline, so releases now take days rather than weeks.
Your posting mentions using LLMs to improve trip recommendations. I recently built a retrieval-augmented assistant with a 400-question evaluation set that we ran before every change, and I would bring the same discipline to testing generative features with your users.
Thank you for your time. I would be glad to walk through one of these systems in more detail.
Kind regards,
Arjun Mehta
This example is fictional: the person, employers and figures are invented to show good structure. Use it as a guide and write your own, true details.
What makes this cover letter work
- 1The first paragraph names the exact role (Senior Machine Learning Engineer, Personalisation) and gives the strongest reason to read on, in two sentences.
- 2The second paragraph proves it with one or two numbers taken from the resume, so the two documents tell the same story.
- 3The third paragraph is about Tidewell Travel, not the writer. It shows why this employer, which a copied letter cannot do.
- 4The close is short and practical: availability, an offer to show more, and thanks. No pleading or pressure.
- 5It stays under about 250 words. Hiring managers often read cover letters on a phone between other tasks.
Cover letter or not? Local norms
Expectations vary. In the UK, Ireland, Australia and New Zealand a short letter or a few lines in the application email is common. In North America many online applications make the letter optional. In parts of Europe and Asia a formal letter is still expected for office and professional roles. If in doubt, send a short one.
Questions people ask
How long should a machine learning engineer cover letter be?
About 200 to 300 words, in three or four short paragraphs. That is long enough to show why you fit and short enough to read on a phone. Never repeat your whole resume.
Do I still need a cover letter?
Not every employer reads them, but many do, especially for smaller companies, career changes and roles with lots of applicants. A short, specific letter rarely hurts and can help.
Who should I address the letter to?
Use the hiring manager's name if the advert or company website gives it. If not, "Dear Hiring Manager" or "Dear Recruitment Team" is fine in most countries.