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I will improve speed and performance of your react nextjs website

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mythosbeats
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mythosbeats
Radek Kowalczyk
improve speed and performance of your react nextjs website
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improve speed and performance of your react nextjs website

About this gig

I will improve the speed and performance of your React / Next.js website with real, measurable optimizations (not generic tips).


What I can do for you:


  • Core Web Vitals optimization (LCP / INP / CLS)
  • Lighthouse/PageSpeed audit + prioritized action plan
  • Reduce bundle size (code splitting, tree-shaking, dependency cleanup)
  • Image optimization (Next/Image, responsive images, modern formats)
  • Fix slow rendering (unnecessary re-renders, heavy components, expensive computations)
  • Improve loading strategy (lazy loading, prefetching, route-level optimizations)
  • Next.js performance issues (SSR/CSR, hydration problems, routing, caching basics)
  • Deploy/build performance-related fixes (Vercel/Netlify) when needed


What you will get:


  • A clean patch/PR (or updated project files) with implemented improvements
  • Before/after results (Lighthouse / CWV metrics snapshot)
  • A short technical summary of changes and why they matter
  • Clear scope and no surprises (each package covers a defined number of pages)


To get started, please send:


  • Website URL (or staging link)
  • Repo link (GitHub/GitLab/Bitbucket) or ZIP + how to run it locally
  • Framework details: React or Next.js, Node version, npm/yarn/pnpm

  • Website type

    • Business

  • Programming language

    • HTML & CSS
    • JavaScript
    • TypeScript
    • React
    • Node.js

  • Website features

    • Marketing
    • Payment
    • Forum
    • Form
    • Events
    • Gallery
    • Dashboard
    • Landing page
    • User Authentication
Respect third-party rights

Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.

Get to know Radek Kowalczyk

Radek Kowalczyk

Frontend Developer

5.0(13)
  • FromPoland
  • Member sinceJul 2021
  • Last delivery3 years

  • Languages

    English, Polish
I am a Mobile Developer with experience in building and maintaining Android and cross-platform applications. My core stack includes: • React Native • Native Android (Java, XML) • Databases and backend communication I focus on production-ready solutions — not templates or quick hacks. I help businesses: • Fix and maintain existing mobile apps • Improve performance and stability • Integrate APIs and backend systems • Refactor legacy Android projects • Build scalable MVPs for real users If you’re looking for someone who treats your app like a real product — let’s talk.

My Portfolio

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