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Backend engineer cover letter example: results first

A cover letter for backend engineer jobs that leads with what you achieved, not with what you were responsible for. Copy it, replace the parts in [brackets] and use the words of the posting you answer.

Open backend engineer jobs today
613
Can be done from home
33%
Median advertised pay
$220K
Dear Hiring Manager,

I am applying for the Backend Engineer position at [Company]. I have [number] years of experience as a backend engineer, most recently at [Current company], where my focus is API design, database tuning, on-call.

Two results from that work:
- Designed and built a payments API in Python that serves 1,200 requests a second with 99.98% availability
- Rewrote the 12 slowest PostgreSQL queries; the slowest page went from 3.1 s to 400 ms

[One or two sentences on why this company: a product you use, a goal from the posting, a problem you can help with.] I would bring the same focus on measurable results, and hands-on experience with Python, Kubernetes and Go, which the posting asks for.

I would welcome the chance to talk about how I can help. Thank you for your time.

Sincerely,
[Your name]

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Questions about a backend engineer cover letter

What should a backend engineer cover letter include?
Three things: the role you are applying for, one or two results from your backend engineer work with numbers, and one specific reason you want this company. Name the skills the posting names; for this work the most frequent today are Python, Kubernetes, Go.
Do backend engineer jobs ask for a cover letter?
None of the 78 open backend engineer postings with a full description here mention a cover letter in their text (counted today). The application form often has a separate field for one: when it does, a short letter still helps.
How long should a backend engineer cover letter be?
Three short paragraphs, under 250 words: a screen without scrolling. Recruiters read the first lines and the results; everything else is skipped.

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