I will fix your react or next js bug in production code

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denys_derkach
D
denys_derkach
Denys Derkach
fix your react or next js bug in production code
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fix your react or next js bug in production code

About this gig

React or Next.js app broken? I debug and fix it cleanly without side effects.

I'm a full-stack engineer, frontend-focused, with 6+ years of production experience, TypeScript throughout, with React and Next.js in real products I built an internal admin platform end-to-end in React/Next.js/Node alongside a large marketing-SaaS product, owning the server layer (route handlers, REST APIs, PostgreSQL) as well as the UI. I fix the bugs that break your build, your UI, or your data flow.


I fix:

  • State issues (hooks, Context, Redux, re-renders)
  • Broken components, forms, routing
  • Next.js SSR / SSG / hydration errors
  • API & data-fetching bugs (React Query, SWR, fetch)
  • Responsive / CSS breakages
  • Errors left behind by AI-generated code


Why me: AI generates plausible React code that doesn't understand your app I fix what it breaks in real production code. Senior-level fixes, not guesswork.


How it works: Send me the bug (screenshot, repo, or CodeSandbox) before ordering I'll confirm scope and quote you, free. Not happy with the first fix? I revise until it's right.

  • Programming language

    • TypeScript

  • Expertise

    • Debugging
    • Performance
    • Design
    • Source control
    • Testing procedures

  • Frontend framework

    • Angular
    • AngularJS
    • Next.js
    • React.js
    • Vue.js

  • Backend framework

    • Express.js
    • NestJS
    • Next.js
    • Node.js

Get to know Denys Derkach

Denys Derkach

Full Stack Engineer, 6 yrs, Angular, React, Next, Vue, Node

  • FromUkraine
  • Member sinceOct 2025
  • Avg. response time1 hour

  • Languages

    English, Ukrainian
I fix, build, and modernize production web apps. 6+ years of engineering across fintech, healthcare, and marketing SaaS. Angular is my depth (v11–v21, RxJS, NGXS), and I also ship in React, Next.js, Vue, and Node — I can own a feature from API to UI when needed. I deliver the fixes and features that need a careful, experienced hand: state tangles, broken forms, performance, small features, and version upgrades, without breaking the rest. Message me before ordering — I'll look for free and tell you the real scope. Not happy with the first result? I revise until it's right.

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