Backend developer cover letter
A backend letter should sound like someone who has kept a service honest. Name their service and one you owned. Include a failure mode if the posting mentions reliability, auth, or data integrity.
Resume tips for a backend developer
How to open
Name the service area in the first sentence and the closest service you owned. Mention the caller. Do not open with how many languages you like.
One failure
A timeout, a bad payload, or a migration is the proof. Skip a metaphor about firefighting.
The data store
Name it only if you used it and it matters to their posting. Otherwise leave the list on the resume.
On call, if it was yours
Say what you were responsible for after hours only when that was the arrangement. Do not imply a rotation you never joined.
An example paragraph
This is an example to adapt, not a letter from a real applicant. Use it only where every detail is true for you.
The billing service is the work I want. I owned an invoice API, including the retry when a payment provider timed out, which matches the reliability work in your posting.
What to skip
Skip a second biography, a datastore you have not used, and any promise about their latency. The letter is not a place to add a skill the resume cannot support.
Questions
- How technical should the letter be?
- One concrete path is enough. Save the rest of the design for the conversation.
- What if I have only built internal tools?
- Say they were internal and name the caller. Do not dress an internal job up as a public API.