Denis D.
Web Developer | React Developer
Senior React Developer (7+ years) — TypeScript • Next.js • Performance & DX I build fast, reliable, and accessible front-ends with React + TypeScript. Over 7 years I’ve shipped greenfield apps, modernized legacy codebases, and set up CI/CD so teams release with confidence. My focus: clear UX, high performance, clean architecture, and predictable delivery. How I can help New features & apps: React 18, Next.js (App Router, RSC/SSR/SSG), routing, forms, tables, charts, i18n. State & data: Redux Toolkit / Zustand / Jotai, TanStack Query, React Hook Form, REST/GraphQL (Apollo/URQL). Design systems: component libraries, Storybook, Radix/shadcn, theming, tokens, documentation. Performance & quality: Core Web Vitals, code-splitting, lazy loading, bundle analysis, accessibility (WCAG 2.1 AA). Testing & CI/CD: Jest & React Testing Library, Cypress/Playwright, GitHub Actions, Vercel/Netlify, previews. Rescue & audits: architecture review, refactors, typing coverage, DX improvements, error/analytics wiring.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3.1k
Billed in all: $10,500$11k
$3.1k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 9% in Redux Thunk
Ranked by MRR among everyone on Upwork with the skill.
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