Module 8: Cover Letters — When to Write One and How to Write One That Gets Read
Table of Contents
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A cover letter isn’t a summary of your resume. The hiring manager can read your resume. A cover letter does something different: it shows you understand the company and the role specifically, connects your experience to their actual problem, and gives a sense of your voice.
This module takes about 10 minutes. After reading it, you’ll know when to write a cover letter, how to structure it, and which phrases mark yours as AI-generated — so you can avoid them.
Do You Actually Need One?
If the application has a cover letter field marked optional: Write one anyway. It signals effort and differentiates you from the majority who skip it. A short, relevant cover letter is a positive signal. An absent one is neutral at best.
If the posting says “cover letter required”: Obviously, write one. A good one, not a form letter.
If there’s no cover letter field at all: Skip it. Attaching an unsolicited Word document to an ATS submission often never reaches a human.
What a Cover Letter Should Do
Three things — in roughly this order:
- Show you understand this specific company and role, not just the category of job
- Connect 1–2 experiences from your background to what they actually need
- Give a sense of your voice — something a resume can’t do
If your cover letter could be submitted to any company posting the same job title with no edits, it’s not doing its job.
The Three-Section Structure
Opening: Why This Company, Specifically
The first paragraph should answer: why this company, not just this job category?
Generic opener (avoid this):
I am excited to apply for the Software Engineer position at Acme Corp. I believe my 5 years of experience make me a strong candidate.
Specific opener:
Acme Corp’s investment in low-latency infrastructure for real-time payments is the exact problem space I’ve spent the last 3 years working in. Building systems that handle event volumes at sub-100ms latency is where I do my best work.
The second version names something specific, demonstrates knowledge of the company, and connects immediately to the candidate’s expertise. It takes 15 seconds of research on the company’s product page or engineering blog to write.
Middle: The Specific Connection
1–2 paragraphs connecting your actual background to the role’s specific challenges. Reference a bullet or project from your resume and expand on the “why” and “how” behind it — the context and judgment that a bullet point can’t capture.
The goal: demonstrate that your experience is directly applicable, not just generally related.
Example:
At Stripe, I rebuilt the internal event pipeline that had become a throughput bottleneck at 40K events/second. The challenge wasn’t just scale — it was doing the migration without a maintenance window. I ended up running old and new systems in parallel with a gradual traffic shift over three weeks. The new system handles 500K events/second and has been in production for 18 months without incident. I’d apply the same no-downtime migration approach to the platform reliability work you’re hiring for.
This paragraph is personal, specific, and directly relevant. A recruiter reading it knows exactly what this candidate built and why it’s applicable.
Close: A Clear Ask
Short, direct. State what you’re hoping for. Don’t pad this section.
Example:
I’d enjoy talking through how my background in distributed systems applies to what you’re building. Happy to make time this week or next. Thanks for reading.
Tone
Write like a person talking to another person. You’re not filing a legal brief. You’re not sending a formal business letter. You’re explaining why you want the job and why you’re right for it.
What this means:
- Contractions are fine. “I’m,” “I’ve,” “it’s” — these are how people talk.
- Short sentences are fine. One idea per sentence reads better than three ideas in one sentence.
- First person is necessary, but don’t start every sentence with “I.” Vary your sentence structure.
Phrases to Eliminate
These phrases appear in the majority of cover letters and signal generic AI-generated content to any experienced recruiter.
Opening phrases to cut:
- “I am writing to express my sincere interest in…”
- “I have always been passionate about…”
- “I am excited to apply for the position of…”
- “Please accept this letter as my formal application…”
Body phrases to cut:
- “I would be a valuable asset to your team”
- “I am a fast learner who thrives in dynamic environments”
- “I am eager to bring my skills to [Company]”
- “I am confident I would excel in this role”
- “Throughout my career, I have demonstrated…”
Closing phrases to cut:
- “Thank you for your consideration and I look forward to discussing…”
- “I welcome the opportunity to further discuss my qualifications…”
- “Please feel free to contact me at your earliest convenience”
- “I am available for an interview at your convenience”
Individual words and phrases to cut regardless of context:
| Cut | Replace With |
|---|---|
| leverage | use |
| utilize | use |
| synergy | (describe the actual relationship) |
| passionate about | (just say what you want to do) |
| excited to contribute | (say what specifically you’ll contribute) |
| game-changer / groundbreaking | (say why it matters) |
| in conclusion | (just end the letter) |
| it’s worth noting | (just say the thing) |
| tapestry / ecosystem | (be specific) |
| not only…but also | (use two sentences) |
The AI tell: the strongest single indicator that a cover letter was AI-generated is an em dash used in a flowing sentence (“My experience in infrastructure — particularly Kubernetes operations — makes me well-positioned…”). Rewrite as two sentences. Cut the em dash entirely.
AI-Generated Cover Letters: Use But Edit
The ATS Resume Improver can generate a cover letter from your resume and the job description. The generated letter applies humanization rules that strip the most obvious AI patterns — no em dashes, no banned phrases, active voice, contractions required.
Use the generated output as a first draft, then:
- Add the company-specific detail (what specifically drew you to this company)
- Replace one generic accomplishment reference with a specific story from your actual work
- Read it out loud — if it doesn’t sound like you, adjust until it does
A good generated cover letter saves 80% of the drafting time. The last 20% — the specific, personal detail — is what you add.
Cover Letter Length
One page maximum. Three to four paragraphs total. Most strong cover letters are under 300 words.
If you need more than one page to explain your interest, you’re including information that belongs on the resume.
Next Steps
Your resume and cover letter are ready. The final module covers the pre-send checklist, page limits, file format rules, and the most common mistakes to eliminate before every submission.
→ Module 9: Final Checklist and Submission
Or return to the course hub: Resume Optimization Course Start
