How to Write a Cover Letter That Isn’t Ignored (and When to Skip One)

Most cover letters are ignored because they repeat the resume in fancier adjectives. Some still matter: smaller teams, research-flavoured roles, career switches, or portals that make the letter mandatory. The skill is knowing which situation you are in.

When a letter is worth thirty minutes

• The application form requires one (do not paste “please see resume”).
• You are switching domains and need one paragraph of bridge logic.
• An employee or hiring manager asked for a short note with your referral.
• The company is small enough that a human likely reads inbound mail.

When it is usually not worth polishing for an hour: high-volume fresher drives where ATS + resume decide the screen, or portals that hide the letter behind optional fields nobody opens. In those cases, invest in the resume and a clean LinkedIn—see LinkedIn for students and early engineers.

What a useful letter actually contains

Three short parts beat five fluffy ones. (1) Why this team or product—specific enough that it could not be swapped onto another company. (2) One proof point that matches a must-have on the JD. (3) A clear close: you are applying for role X and are available for next steps.

Skip childhood passion stories. Skip “I am a perfect fit for every bullet.” Skip rewriting your entire employment history. If the JD is confusing, triage it first using how to read a tech JD so the letter mirrors the real must-haves.

Length and tone

Half a page is plenty for most tech roles. Write like an email to a busy teammate. Use “I” sparingly but honestly. If English is not your strongest suit, prefer plain sentences over ornate vocabulary—have one friend read for sense, not for Shakespeare.

Referral notes vs formal letters

When someone refers you, they often want a blurb they can forward: two sentences on what you do and why you care about this team. That blurb is not a cover letter essay. Help your referrer look concise. Broader strategy on referrals sits in referral vs cold apply.

A quick decision rule

If you cannot say anything true and specific in ten minutes of thinking, skip the optional letter and strengthen the resume bullet that would have been your proof point. A generic letter can mildly hurt; silence plus a sharp resume rarely does.

Write short, specific letters when a human or a form truly needs them. Otherwise put the energy into evidence on the resume and the interview.