React Developer
Resume Metrics

Lean on qualitative signals. A number is ideal, though scope and direction still land: you can name the first accessibility audit you ran for the team, took a failing flow to compliant, or set the bar new components had to clear. A recruiter reads those as impact, and they hold up. The qualitative table further down has a sample per category to borrow.

Estimates are fine so long as they are honest and you would defend them. If a page felt twice as quick after a refactor but the Lighthouse score went unsaved, a range like "roughly halved the load time" is fair. Use relative percentages where the raw numbers are private. The single test: you could walk someone through how you reached the figure if they ask in the interview.

Don't. An invented number unravels the second an interviewer digs in, and React metrics invite digging: any dev on the panel can ask how you clocked LCP or which tool showed the re-render savings. One made-up figure turns a solid interview into a trust problem. Give a qualitative signal in its stead; which holds up as true and still makes your point.

Not all. Give a metric to your top few bullets in the most recent role, the ones recruiters hit first. A number on every line makes the strong ones run together and drags you into filler. A couple of solid metrics outdo a screen of them.

Go with whichever is more striking and still true. A large relative move works well in percent ("cut bundle size 55%"); a large raw number carries alone ("serving 2M monthly users"). Drop a percentage that floats free of any baseline, since "improved performance 40%" raises the obvious forty-percent-of-what question. Show them side by side when you have both: "cut LCP 54%, from 4.1s to 1.9s."

Yes, and turning them up is easier than juniors assume. A Lighthouse score before and after, the components you shipped, the test coverage you added, or the accessibility issues you cleared each sit within a lone internship or project. Revenue is not the concern; you just need proof the work counted.

While the site is still up, open Chrome DevTools and run Lighthouse, or reach for PageSpeed Insights and LCP, INP, and CLS come back inside a minute. For real-world data, Google Search Console shows field Core Web Vitals for any property you own. If the project is behind you, estimate honestly from memory and mark it as an estimate.

One is plenty. A lone headline number up top, say the user base you reached or your biggest performance win, gives the recruiter a reason to stay. Drop everything else into the work-experience bullets so it stays quick to skim in those first seconds. The React resume guide breaks that summary down.