Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get Fix React performance issues & unnecessary re-renders

Marwen L.Status: Offline
Marwen L. Marwen L.
5.0
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Marwen, priced and ready to go.
Marwen L.Status: Offline
Marwen L. Marwen L.
5.0
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Marwen, priced and ready to go.

Project details

I'm a Senior React Developer with 5+ years of enterprise experience, including shipping a 30+ module production app used by thousands. I specialize in eliminating React performance bottlenecks — unnecessary re-renders, bloated bundles, and slow state updates. You'll get clean, well-commented TypeScript code and a clear explanation of every change made. No guesswork, no black-box fixes.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Performance Optimization
What's included
Service Tiers Starter
$100
Standard
$200
Advanced
$350
Delivery Time 2 days 4 days 7 days
Number of Revisions
123
Bug Investigation
Fix Documentation
-
Detailed Code Comments
-
-
Optional add-ons You can add these on the next page.
Additional Revision
+$50
5.0
1 review
100% Complete
(1)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

WS

Wassim S.
5.00
Jul 4, 2026
fix a bug in my web site Great experience working with Marwen. He delivered fast, communicated clearly throughout, and kept me updated at every step. Quick to understand what I needed and easy to work with would definitely hire again
Marwen L.Status: Offline

About Marwen

Marwen L.Status: Offline
Senior Full Stack React Node.js Three.js React Native
5.0  (1 review)
Lisbon, Portugal - 10:38 am local time
5+ years in React, Node.js, TypeScript · Full-stack architecture · Micro-frontends · React Native mobile · Three.js & React Three Fiber 3D experiences · Performance & security audits.
Web · Mobile · 3D · Performance · Security
Freelance, B2B & contract — DM or email to get started.

Steps for completing your project

After purchasing the project, send requirements so Marwen can start the project.

Delivery time starts when Marwen receives requirements from you.

Marwen works on your project following the steps below.

Revisions may occur after the delivery date.

Review your codebase and reproduce the performance issue

Starter

Profile with React DevTools and Chrome Profiler

Starter

Review the work, release payment, and leave feedback to Marwen.