Remember that 2nd review I brought up earlier? This is the part we tune for it. It's the
final hurdle before an interview. Recruiters dig into your resume more carefully now, yet
95% of the screening decision still rides on your most recent role.
That makes sense: your latest role is the truest read on your current seniority, your
abilities, and what you're trusted with. To pull a "yes" out of a recruiter, you
have to hit the entire role profile for a React Developer, giving one
dedicated bullet to each area we named back in the Profile Summary's Domain Expertise
bullet.
1
Modular UI Development
You split a React app into components other engineers can reuse. A codebase full of one-off components
slows down every feature that comes after, so hiring managers want to see you design for reuse from day
one. Lay out how you used headless components and container/presentational splits, in React and
Storybook, to push your component reuse rate up.
Techniques
Composable APIs
Prop contracts
Slot patterns
Container/presentational
Headless components
Tools
React, Vue, Svelte
Tailwind CSS, CSS Modules
Storybook, Bit
Metrics
Component reuse rate
Design-system adoption %
Story coverage %
2
State, Data Flow & Client Architecture
You tame React state and data flow across a dozen components. This is where most React bugs are actually
born, so hiring managers want proof you can hold it together as the app grows. Write about how you used
a client store and a server-cache library like Redux Toolkit and RTK Query to cut redundant refetches
and lift your cache hit rate.
Techniques
Client/server split
Cache invalidation
Suspense boundaries
Optimistic updates
Tools
Redux Toolkit, Zustand, Jotai
TanStack Query, SWR, RTK Query
Metrics
Cache hit rate
Form completion %
Re-render count
3
Performance & Optimization
You make a React app fast, from first paint to every click. A slow React app bleeds users and
conversions, and unlike most claims on a resume, a hiring manager can verify your speed in seconds. Show
them how you used React Server Components and hydration discipline, measured in Lighthouse, to cut your
JS bundle size and hydration time.
Techniques
Code splitting
Lazy loading
Server components
Hydration discipline
Tools
Lighthouse, WebPageTest, RUM
Webpack, Vite, Turbopack
Next.js Image, Cloudinary
Metrics
LCP, INP, CLS
JS bundle size, hydration time
4
Accessibility, Usability & UX Quality
You build React UI that works for keyboard and screen-reader users. Two things ride on it for a hiring
manager: it's a legal line you can't cross in many markets, and accessible UIs keep more users
in the funnel. Mention how you used ARIA patterns and focus management, checked with Axe and NVDA, to
pass WCAG 2.2 AA and drive your open a11y issues down.
Techniques
Semantic HTML
ARIA patterns
Focus management
Screen-reader testing
Tools
Axe, WAVE, Lighthouse a11y
NVDA, VoiceOver, JAWS
Metrics
WCAG 2.2 AA pass
Axe issue count
A11y closure rate
5
Integration with APIs & Back-End Systems
You connect React components to back-end services that sometimes fail. Hiring managers look here to see
whether your UI degrades gracefully, or whether one failed call leaves users staring at a blank screen.
Point out how you used GraphQL queries and error boundaries, with Apollo and Zod, to keep the UI usable
when calls failed and lift your retry success rate.
Techniques
REST integration
GraphQL queries
Auth flows
Schema validation
Error boundaries
Tools
Fetch, Axios, ky
Apollo, urql, Relay
Zod, Yup, Valibot
MSW, OpenAPI codegen
Metrics
API error rate
P95 latency
Retry success rate
6
Testing, Reliability & Observability
You catch React regressions before your users hit them. For a hiring manager, it's the line between
someone who ships a feature and someone they'd trust with the whole app, not just code that ran
once locally. Walk them through how you used component and E2E tests in Testing Library and Cypress,
plus Sentry on the bugs that reached users, to drive your flaky test rate and MTTR down.
Techniques
Unit tests
Component tests
E2E tests
Visual regression
Tools
Vitest, Jest, Testing Library
Playwright, Cypress
Sentry, Datadog RUM, LogRocket
Metrics
Coverage %
MTTR
Production error rate
Flaky test rate
7
Build Systems, Tooling & CI/CD
You give the whole React team faster builds and cleaner tooling. Build and CI work speeds up every
engineer on the team, so a hiring manager reads owning it as a sign you lift the people around you.
Spell out how you used a monorepo and bundle budgets, wired up in Turborepo and GitHub Actions, to cut
build time and CI duration for the whole team.
Techniques
Monorepo setup
CI pipelines
Preview deploys
Bundle budgets
Tools
Vite, Turbopack, esbuild
Turborepo, Nx, pnpm
GitHub Actions, Vercel, Netlify
Metrics
Build time
CI duration
Deploy frequency
8
Collaboration & Delivery Processes
You ship as a team, from code review to a safe rollout. Companies hand promotions to the people who make
shipping calmer, not the ones who just close tickets, so hiring managers watch for it. Tell them how you
contributed to the design system and shipped behind feature flags, using GitHub and Statsig, to keep
your rollout success rate high.
Techniques
PR reviews
RFC writing
Design-system contributions
Feature flag rollouts
Tools
GitHub PRs, GitLab MRs
Figma, Zeplin
LaunchDarkly, Statsig
Linear, Jira
Metrics
PR review SLA
DS contributions
Rollout success rate