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Cover letter example

Software Developer Cover Letter Example

A lead developer reading a junior letter wants shipped work, good testing habits and someone who learns from seniors. This letter opens on a dashboard with real users, then shows tests, reviews and a side project, tied to an employer moving to the writer's stack.

Early career · 239 words · Last reviewed 4 November 2026 · 2 min read · How we write these

The job this letter answers

Software Developer, Marina Commerce

Marina Commerce runs online checkout for about 6,000 shops from Lagos, and is moving its merchant tools from PHP to React and Node.js with a team of 14 developers.

  • Build features across a React front end and a Node.js back end
  • Write automated tests for the code you ship
  • Review pull requests and join bug triage
  • Work closely with senior developers on database changes
Template

The letter takes the colors of the resume template, the same way a downloaded cover letter matches your resume.

Chinedu Eze

Lagos · chinedu.eze@example.com

4 November 2026

Mr Tunde Adeyemi

Engineering Lead

Marina Commerce

Subject: Application for Software Developer

Dear Mr Adeyemi,

Three thousand merchants use the dashboard I shipped at Ikoyi Payments, and support tickets about transaction history fell by 25% after it launched. I would like to build features like that as a Software Developer at Marina Commerce.

I work across a React front end and a Node.js back end, and every feature I ship comes with unit and integration tests; coverage on the modules I own rose from 40% to 78%. I review pull requests, join a weekly bug triage with two other developers and fix production bugs within a day of them being raised, with a short note on the cause.

Marina Commerce moving its merchant tools to React and Node.js means joining while the stack I use every day is being put in place. The advert's line about working closely with senior developers on database changes matches how I already work, since I pair with a senior developer on database changes and release steps. I started as an intern at Surulere Tech Hub, where I fixed 30 small bugs and learned the release process. To practice the full stack alone, I built a budget tracker in React, Node.js and PostgreSQL, with tests and a live demo.

Once we have a date, I will send links to the budget tracker's code and live demo so you can read the tests before we talk. What would you want a new developer to learn first in your merchant tools?

Kind regards,

Chinedu Eze

A made-up letter. The person, the employers and every number are invented, and any resemblance to a real one is chance. Sending it by email? Put the subject line in the email’s subject box, add your name to it, and attach the letter as a PDF.

Paragraph by paragraph

  1. The opening

    Starts: “Three thousand merchants use the dashboard I…”

    Opens on users and a measured effect, which matters more to a lead developer than a list of languages.

  2. Your strongest evidence

    Starts: “I work across a React front end…”

    Answers the advert's lines on building, testing and reviewing in the order they appear.

  3. Why this employer

    Starts: “Marina Commerce moving its merchant tools to…”

    Gives a reason tied to the employer's migration and answers the database line in the advert's own words, with the side project as extra proof.

  4. The close

    Starts: “Once we have a date, I will…”

    Commits to sending code links before the interview, so the reader can judge real work, and ends on a learning question.

Why this letter works

  • The opening gives users and a support ticket drop, not only a feature name.
  • Test coverage on owned modules is a junior developer's clearest quality signal.
  • The reason for applying is the employer's move to React and Node.js, the writer's own stack.
  • Sending code links before the interview lets the lead developer judge the work directly.

How to write your own software developer cover letter

  1. Open with a feature that real users rely on and one measured effect it had.
  2. Give test coverage on the code you own, with the before and after.
  3. If the employer is moving to your stack, say so; it shortens your time to useful work.
  4. Offer to send repository and demo links before the interview.
  5. Ask what a new developer should learn first; it shows you expect to keep learning.

Common questions

Should a junior developer include links to code in the letter?

Yes, if the code is yours and public. One repository link and one live demo is enough; more makes the reader choose.

How do I show I learn well from senior developers?

Name something you do with them, such as pairing on database changes, rather than saying you are eager to learn.

Does an internship belong in a two-year developer's letter?

One sentence is enough if it shows a habit you still use, such as the release process.

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