The difference between a forgettable resume and an interview-getting one is usually the bullet points. Responsibilities tell a reader what you were assigned; accomplishments show what you actually did.
The formula
Action verb + what you did + measurable result. For example: "Cut CI build time from 30 minutes to 6 by parallelizing tests." It leads with a verb, states the work, and quantifies the outcome.
Quantify whenever you can
Numbers create credibility and scope. Percentages, dollar amounts, headcount, time saved, volume handled — any of these make a bullet concrete. If you don't have a metric, describe scale another way ("across 3 shifts," "for a 40-person office").
Trim ruthlessly
Aim for one or two lines per bullet and 3–5 bullets per role. If a line doesn't show impact or relevance, cut it.