I will fix react bugs, refactor code, and optimize frontend performance

O
okovalchuk
O
okovalchuk
Oleg K

About this gig

Is a broken React component ruining your app? Are console errors piling up, or is your application running painfully slow?

As a Senior Frontend Engineer with over 10 years of commercial experience, I specialize in deep debugging, clean code architecture, and high-performance web applications. I don't just patch symptoms; I find the root cause and fix it using industry best practices.

What I can do for you:

  • Fix tricky React state management issues (Redux Toolkit, Context API, Hooks).
  • Eliminate memory leaks, unnecessary re-renders, and optimize performance.
  • Refactor legacy code using SOLID principles and clean architecture.
  • Fix responsive layout issues, Tailwind CSS, or Material UI bugs.
  • Debug JavaScript/TypeScript runtime errors and API integration issues.

Why choose me?

  • Production-ready, clean, and well-documented code.
  • Fast response times and strict adherence to deadlines.
  • Experience with complex enterprise-level architectures.

Please contact me before placing an order so we can discuss the issue and ensure I have access to the repository! Let's get your app running perfectly.

Get to know Oleg K

Oleg K

Software Developer

  • FromUkraine
  • Member sinceApr 2026
  • Languages

    English, Russian, Ukrainian
I am an experienced Software Engineer with a demonstrated history of working in the computer software industry. I am skilled in JavaScript (React, Angular, Node), PHP, HTML and CSS.

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