Cover letter for a job: structure and example

A cover letter is four to six sentences sent with your CV. Its job is not to repeat the CV but to connect one specific vacancy to your experience: the role, why you match this posting, one measurable result, and a clear next step. Letters that never mention the vacancy read as bulk mail and get no reply.

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The four parts

Opening: the role and where you found it.
Relevance: the requirements from that posting you genuinely cover.
Proof: one result with a number, from a real project.
Next step: send a CV, book a short call, or ask whether the role is still open.

Example for an IT role

Hello! I am applying for the Python Developer role posted in your channel. I have four years with Django and FastAPI; my last project was a billing system for 200k users where I brought API response time down from 800ms to 120ms. Happy to send my CV and a couple of relevant cases. Is the role still open?

Where an AI generator helps

It helps when the model gets the vacancy text and your real experience as input — then the letter contains the actual stack and context.
It hurts when prompted with "write a cover letter for a developer": the output is recognisably generic and recruiters filter it on the first line.
Always check the numbers: a generated letter must not invent results you cannot back up in an interview.
FirstMessage assembles the message from the vacancy text and your profile, which is why the stack in it matches the posting.

FAQ

How long should a cover letter be?

Four to six sentences for a messenger or a short email, up to ten lines for a formal application. The practical test is one phone screen without scrolling: recruiters read the first two lines and decide from there.

Do I need a cover letter if I have a CV?

Yes when the application goes to a person directly. The CV lists what you did; the letter explains why you are writing about this particular role. In application forms with an optional letter field, filling it in still measurably helps.

Is it OK to use AI for a cover letter?

It is, provided the model receives the specific vacancy and your real experience. Generic AI letters are easy to spot because they describe a role rather than the posting. Treat the output as a draft and verify every claim in it.

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