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The Frontend Engineer resume: every KPI, formula, and pattern

Frontend EngineerSenior Frontend EngineerUI EngineerProduct Engineer (Web)Design Systems Engineer
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The 7 numbers that carry this resume

Every frontend engineer bullet gets stronger with one of these. The benchmark tells you what's worth claiming; the question helps you dig your real number out.

Load / render timea % or seconds-to-seconds cut; LCP under 2.5s reads as healthy

What did you make faster, measured how (LCP, TTI, Lighthouse), from what to what?

Bundle sizea 20%+ reduction is worth claiming

How many KB/MB did you cut, and what technique did it (code-splitting, tree-shaking, dependency swap)?

Users / traffic servedmonthly actives or requests give bullets scale

How many users, sessions, or requests did the surfaces you owned serve?

Error / crash ratea reduction with the monitoring tool named (Sentry, Datadog)

Did errors, crash-free sessions, or UI-related tickets improve because of your work? By how much?

Conversion / adoptionany lift on a funnel step or feature adoption is gold

Did a flow you built move a product number — sign-ups, checkout completion, feature adoption?

Delivery speedcycle-time or release-frequency improvements

Did your tooling/design-system work make other engineers ship faster? Measured how?

Test coverage / escaped bugscoverage % is weak alone; pair it with fewer escaped bugs

What did testing you added prevent — regressions, hotfixes, rollbacks?

Bullet formulas

Structure first, wording second. Fill the brackets with your own numbers.

  1. Strong verb + what you built/changed + stack or technique + measured outcome for users or the team.
  2. Weak: "Worked on the dashboard using React." Strong: "Rebuilt the analytics dashboard in React + TypeScript, cutting initial load from 6.1s to 1.8s (LCP) for 40k monthly users."
  3. No product metrics? Use engineering ones: bundle KB cut, build minutes saved, components adopted by N teams, PRs reviewed.

Verbs that read like ownership

building
Built · Shipped · Implemented · Architected · Migrated · Rebuilt
performance
Optimized · Profiled · Reduced · Eliminated · Accelerated
quality
Instrumented · Tested · Hardened · Debugged · Stabilized
systems
Standardized · Componentized · Abstracted · Documented · Versioned
collaboration
Partnered · Paired · Reviewed · Unblocked · Aligned
leadership
Led · Drove · Owned · Mentored · Championed

Weak phrase → stronger pattern

worked on the frontendBuilt/rebuilt [surface] in [stack], [measured outcome] for [N] users

"Worked on" hides whether you led, fixed, or watched. Name the artifact and the result.

responsible for developingShipped [feature/surface] with [stack], [outcome]

Responsibility is the job posting; the resume is for what actually shipped.

used ReactBuilt [thing] in React — [outcome or scale]

The stack belongs to the achievement, not as the achievement.

fixed bugsEliminated the top [10] error classes in [flow], raising crash-free sessions to [99.6%]

Everyone fixes bugs. Which ones, found how, with what effect — that's the signal.

improved performanceCut [metric] from [X] to [Y] by [technique]

"Improved" without a before/after is a claim, not a fact.

collaborated with the teamPartnered with [design/backend] to ship [thing]; [your specific contribution]

Collaboration is table stakes — say what the collaboration produced and what part was yours.

Keywords screens look for

ReactTypeScriptperformanceaccessibilitydesign systemstate managementtestingCI/CDSSRbundle sizeREST/GraphQLcode reviewmentoringcross-functional

Use the ones that are true for you — keyword stuffing reads as noise to a human on the other side. The studio tracks your coverage live.

Before you send it

  • A link that renders: portfolio, deployed side project, or GitHub with a pinned, README-ed repo
  • One performance number in the top bullet of your current role — it's the fastest credibility win
  • Stack in context ("rebuilt X in React + TypeScript"), plus a compact skills list for the ATS
  • Scale markers everywhere: users, requests, screens, teams served by your components
  • Accessibility mentioned once, concretely — it separates product-minded engineers from stylers
  • Testing evidence tied to prevented regressions, not a bare coverage percentage
  • Trim to the last [6–8] years; graduation-era coursework earns nothing after your first two roles

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