How to Write ATS-Friendly Resume Bullet Points (With Examples)

ATS (Applicant Tracking Systems) reject over 75% of resumes before a human ever reads them. The problem? Most engineers write bullet points that describe job duties, not impact. This guide shows you the exact formula to fix that.

🔑 The STAR Formula for Resume Bullets

Every high-scoring resume bullet follows this structure:

[Action Verb] + [What You Did] + [Quantified Result] + [Context]

Example:

❌ Worked on reducing app crashes

✅

Reduced app crash rate by 84% by implementing centralized error handling with Sentry, improving 4.1 → 4.6 Play Store rating for 500K users

📊 The Quantification Framework

If you don't have numbers, use this framework to find them:

Category	Questions to Ask Yourself
Scale	How many users/requests/transactions?
Speed	By how much did you improve latency/load time?
Cost	How much infra/time cost did you save?
Coverage	What % of codebase did your tests cover?
Business	How did this affect revenue/retention/conversion?

✅ 30 Before/After Examples

Flutter / Mobile

Before	After
Built the login screen	Engineered OAuth 2.0 + Google Sign-In flow using Firebase Auth, reducing login friction and achieving 92% signup completion rate
Fixed bugs in the app	Resolved 47 critical bugs across 3 sprints using Crashlytics stack traces, dropping crash-free session rate from 94.2% to 99.1%
Improved app performance	Optimized Flutter widget tree by eliminating 120ms frame drops; achieved smooth 60fps on mid-range devices (Redmi Note 8)
Added push notifications	Integrated FCM with topic-based targeting for 3 notification channels, achieving 38% open rate (industry avg: 14%)
Worked on state management	Migrated 8 feature modules from setState to Riverpod, reducing widget rebuild count by 67% measured via Flutter DevTools

Backend / API

Before	After
Worked on REST APIs	Designed and shipped 14 RESTful endpoints using FastAPI with OpenAPI spec, serving 2M daily requests at p99 latency < 120ms
Improved database queries	Optimized 6 slow PostgreSQL queries using composite indexes; reduced average query time from 890ms to 23ms
Built a caching system	Implemented Redis caching for user session data, reducing database load by 71% and API response time by 340ms

Frontend / Web

Before	After
Made website faster	Achieved 98/100 PageSpeed score by implementing lazy loading, image WebP conversion, and edge CDN via Cloudflare
Worked on React components	Built 14 reusable React components with Storybook documentation; reduced UI development time by 40% across 3 teams

🚫 7 Common ATS-Killing Mistakes

Using tables or columns — Most ATS systems can't parse multi-column layouts. Use single-column format. Generic action verbs — "Worked on", "Helped with", "Was responsible for" signal junior thinking. Use: Engineered, Architected, Optimized, Reduced, Delivered. Spelling "JavaScript" wrong — ATS matches keywords exactly. "Javascript" ≠ "JavaScript". Not mirroring job description keywords — Copy the exact terminology from the job description (e.g., if JD says "React.js", don't write "ReactJS"). Using images or logos — ATS cannot read images. Keep your resume text-only. Missing section headers — Use standard headers: "Work Experience", "Education", "Skills", "Projects". Not "My Journey" or "Where I've Been". Wrong file format — Always submit .docx or .pdf. Not .pages or .rtf.

🤖 Test Your Resume Right Now

PrepHit AI's Job Match Analyzer

An ATS compatibility score
Exact keyword gaps
1-click bullet point rewrites powered by Gemini 2.5 Flash

No guesswork. Just data.