Most resumes describe duties: what the job was. The ones that get interviews describe achievements: what changed because you were there. The difference is usually in how each bullet is written.
The formula
Action verb + what you did + result. Start with a strong verb (Led, Built, Reduced, Launched), say what you worked on and how, then finish with the outcome, ideally measured.
Examples
Duty: 'Responsible for testing the application.' Achievement: 'Executed regression and API tests for each release and reduced escaped defects by 15% over two quarters.' Use your own numbers.
Where to find numbers
Think about team size, number of users or accounts, volume of work, time saved, money saved or earned, and improvement percentages. If you genuinely do not have a figure, describe scope instead, such as the number of releases or the size of the system. Never invent a number: interviewers will ask about it.
Choose verbs carefully
Replace phrases like 'responsible for', 'worked on' and 'helped with' with verbs that show your part: led, built, designed, automated, negotiated, mentored, migrated. Vary them so five bullets do not start the same way.
Keep them short
One idea per bullet, one or two lines, and four to six bullets per role. Put the most impressive bullets first, and cut older roles down to the highlights.
Use the builder's tools
In the ResumeChecker builder, the suggestions tab flags bullets with weak openers and the share of bullets that contain numbers. The AI helper can reword a bullet, but it only rewords what you wrote, so you still need to supply the facts.
Checklist
• Starts with a strong action verb. • States what you did and how. • Ends with a result, measured where possible. • No invented numbers. • One to two lines long.