Do
I am applying for the Software Engineer role because I reduced API latency 40% on a payments service that processes 2M requests a day—work that matches the scale described in your posting.
Browse ATS-friendly cover letter samples and job cover letter templates by title. Copy a proven opening, then tailor the body with HireFlow's AI cover letter generator—or start from the anatomy guide below.

Filter by tech, marketing, healthcare, finance, entry-level, career changer, or executive. Each card links to a full role-specific example.
A professional cover letter format is short and scannable. Hiring managers look for a clear role match, one proof point with a number, and a close that asks for a conversation—not a biography.
Put your name, phone, email, city, and LinkedIn in the body of the document—not only in a header graphic. ATS tools and recruiters need selectable text. Match the name on your resume.
Name the job and one reason you fit. Cover letter opening paragraph examples that work lead with a result, not “I am writing to apply.”
One or two paragraphs. Map a past win to the posting’s top requirement. Use a number, a tool from the job description, and the outcome. Skip duties you already listed on the resume.
Thank the reader, restate the role, and invite a conversation. No “I am the perfect candidate.” Keep it to two sentences.
Do
I am applying for the Software Engineer role because I reduced API latency 40% on a payments service that processes 2M requests a day—work that matches the scale described in your posting.
Don't
I am writing to express my sincere interest in any available position at your prestigious company, where I am a hard-working team player who thinks outside the box.
Vague praise and “any available position” get skipped. Tie the opening to the job.
Keep it to one page: three or four short paragraphs, about 250–400 words. Recruiters skim. State the role, one quantified proof point, why this employer, and a clear close. If you cannot fit it on a page, cut biography, not evidence.
Not every posting requires one, but many hiring managers still open the letter when they shortlist. Workday, Greenhouse, and similar ATS tools store it with your application. A specific letter helps when you are changing careers, explaining a gap, or competing for a role where writing and judgment matter. A generic one is usually skipped.
Use a single-column professional cover letter format: standard fonts, selectable text, no tables or text boxes. Mirror a few job-description terms in full sentences, not a keyword dump. Save as a text PDF or DOCX, name the file FirstLast_CoverLetter, and keep contact details in the body so parsers can read them.
Lead with transferable outcomes, not your old job title. Open with the target role, then one paragraph that maps a past result to the new posting’s top requirement. Name tools or methods from the job description. Skip a long origin story. Pair the letter with a tailored resume and generate a draft in HireFlow if you want a starting structure.