Why the first word of each bullet matters
Recruiters skim. On a first pass they read the first few words of each bullet, not the whole line. If those first words are "Responsible for" or "Worked on", they have learned nothing about what you actually did. If they are "Reduced", "Launched" or "Migrated", they have learned an outcome before reading further.
Action verbs also matter for ATS matching. Job descriptions are written in verbs — "manage", "design", "analyze", "deploy" — and applicant tracking systems compare the language in your resume with the language in the posting. A bullet that uses the same verb the employer used is a cleaner match than one that uses a loose synonym.
The rules for using action verbs
A few simple rules cover almost every case.
Use past tense for past roles, present tense for your current one
Bullets under a job you have left should read "Built", "Led", "Reduced". Bullets under your current job can use "Build", "Lead", "Reduce" for ongoing work, but past tense is fine for completed projects within the current role. Never mix tenses within one role without a reason.
Do not repeat the same opener
If five bullets in a row start with "Managed", the reader stops reading the verbs. Spread your openers across categories (leadership, building, improving, analyzing) so the page shows range.
Match the seniority you are applying for
Verbs carry level. "Assisted", "supported" and "helped" describe contribution. "Led", "owned", "architected" and "established" describe responsibility. Use the verbs that honestly describe what you did — but do not undersell real ownership with junior-sounding verbs.
Action verbs by category
Use these as a menu, not a checklist. Pick the one that is accurate for what you actually did.
Leadership and ownership
Led · Directed · Owned · Spearheaded · Oversaw · Mentored · Coached · Coordinated · Championed · Established
Building and delivering
Built · Designed · Developed · Launched · Shipped · Implemented · Engineered · Architected · Deployed · Created
Improving and optimizing
Reduced · Improved · Optimized · Streamlined · Automated · Accelerated · Consolidated · Refactored · Modernized · Simplified
Analyzing and researching
Analyzed · Investigated · Evaluated · Audited · Forecasted · Modeled · Identified · Diagnosed · Benchmarked · Validated
Growing and selling
Grew · Generated · Negotiated · Acquired · Expanded · Converted · Retained · Secured · Pitched · Closed
Communicating and collaborating
Presented · Partnered · Facilitated · Documented · Trained · Aligned · Advised · Consulted · Represented · Authored
Weak openers to retire
These phrases describe a job, not an achievement. Replace them whenever you can.
"Responsible for" → name the action: "Ran weekly release planning for a team of six."
"Worked on" → say what you did: "Rewrote the billing export in Python, cutting runtime from 40 to 6 minutes."
"Helped with" → state your part: "Wrote the test suite that caught regressions before each release."
"Duties included" → drop it and start with the verb.
Before and after: rewriting real bullets
A strong bullet follows a simple pattern: verb, what you did, how or with what, and the result. Here are examples across roles.
Engineering
Before: "Responsible for the backend API."
After: "Designed and maintained a FastAPI backend serving 10,000 daily requests, reducing average response time by 35%."
Marketing
Before: "Worked on email campaigns."
After: "Launched a segmented email program that lifted open rates from 18% to 29% in one quarter."
Operations
Before: "Helped with vendor management."
After: "Renegotiated contracts with four vendors, saving $60K annually."
No numbers yet?
Use scope instead: team size, number of users, number of clients, frequency, or budget range. "Supported a 40-person sales team" is better than a bare "Supported sales." Only use figures that are true and that you can explain in an interview.
Mirror the verbs in the job description
Open the posting and highlight the verbs in the responsibilities section. If it says "develop", "maintain" and "collaborate", and your resume says "created", "looked after" and "worked with", you are making the match harder than it needs to be.
Swap in the posting's verbs wherever they honestly describe what you did. Do not force verbs for work you did not do, and do not stuff the same verb into every line.
Check your bullets before you apply
Run your resume and the target job description through ResumeChecker (free, no signup). It shows how well your wording lines up with the posting and flags weak or missing language, so you can fix the bullets that matter before you hit apply.