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Systems software engineer cover letter example: results first

A cover letter for systems software 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 systems software engineer jobs today
251
Can be done from home
9%
Median advertised pay
$238K
Dear Hiring Manager,

I am applying for the Systems Software Engineer position at [Company]. I have [number] years of experience as a systems software engineer, most recently at [Current company], where my focus is operating systems, concurrency, performance profiling.

Two results from that work:
- Rewrote the storage engine’s write path in C++; throughput rose from 40,000 to 110,000 writes a second on the same hardware
- Fixed a lock contention problem that cut 99th-percentile latency from 85 ms to 12 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 C++, Python and Linux, 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 systems software engineer cover letter

What should a systems software engineer cover letter include?
Three things: the role you are applying for, one or two results from your systems software 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 C++, Python, Linux.
Do systems software engineer jobs ask for a cover letter?
None of the 37 open systems software 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 systems software 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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