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I will fix bugs, optimize speed, or refactor your reactjs nextjs codebase
Aminul Islam
5.0
5.0
About this gig
Is your React or Next.js app throwing unexpected errors, broken layouts, or loading slowly? I am here to help!
As a Senior Full Stack Engineer, I diagnose, fix, and optimize React.js, Next.js, and JavaScript codebases quickly and efficiently without breaking existing functionality.
️ What I Can Fix & Optimize For You:
React.js & Next.js State Management & Hook Bugs (Redux, Context API, useState)
UI & CSS Layout Glitches (Tailwind CSS, Flexbox, Grid, Responsive Design)
API Integration Errors, CORS Issues & Server Component (RSC) Bugs
Hydration Errors & Build Failures in Next.js
Google Lighthouse & Web Vitals Speed Optimization
Code Refactoring for Clean Architecture & Performance
Tech Stack Covered:
React.js, Next.js, TypeScript, JavaScript (ES6+), Node.js, Express, Tailwind CSS, Redux, HTML5/CSS3.
Why Choose My Services?
24-Hour Express Bug Fixing Available
Detailed Technical Explanation of the Fix
100% Satisfaction & Clean Code Guarantee
Contact me now with your error details or repository access for a quick diagnostic!
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 Aminul Islam
Aminul Islam
Senior Full Stack Software Engineer React Nextjs Nodejs MERN Specialist
- FromBangladesh
- Member sinceJan 2021
- Last delivery3 months
Languages
Bengali, English
Hi, I'm Aminul Islam! A Senior Full Stack Software Engineer with 5+ years of experience crafting fast, scalable web apps.
🚀 Core Stack:
• React.js, Next.js, TypeScript, Tailwind CSS
• Node.js, Express, MongoDB, PostgreSQL
• REST APIs, Stripe, Firebase, Auth
💡 What I Deliver:
✅ Custom Full-Stack Web Apps & SaaS Platforms
✅ Pixel-perfect Figma to React / Next.js
✅ Speed Optimization & Bug Fixes
Clean code, mobile-first design, and on-time delivery guaranteed.
📩 Have a project or custom request? Message me today to get started!
My Portfolio
FAQ
What do I need to provide to start?
Repo link (GitHub/GitLab), live URL, screenshots/videos of bugs, error messages/console logs, or a brief description of issues.
What kind of projects do you work on?
React, Next.js (App Router/Pages), Tailwind CSS, plain JS/TS, Redux/Zustand, Framer Motion — anything frontend-focused. Backend fixes (Node/Express) only if minor and related.
Do you provide a report or explanation?
Yes — detailed summary of issues found, fixes applied, and suggestions (especially in Standard/Premium).
Can you handle TypeScript or complex state management?
Yes — TypeScript errors/fixes, hooks, context, Redux, Zustand, etc., are common.
Will you refactor messy/AI-generated code?
Absolutely — I clean up "vibe code", remove duplicates, improve readability, and make it production-ready.
How do you handle revisions?
Unlimited within the original scope (fixing reported bugs, minor tweaks). Major new features or scope changes may require extra time/fee.
Do you test on multiple devices/browsers?
Yes — fixes are tested across Chrome, Firefox, Safari, Edge, and mobile views (responsive checks included).
Can I get the fixed code via GitHub?
Yes — I can push changes to a branch/PR or send zipped files. Private repo access optional (extra if needed).
What if the issue is backend-related?
I focus on frontend — for full-stack issues, I can advise or fix frontend parts only (e.g., API call handling).
Can you share case studies of codebases you've fixed?
Absolutely! I regularly solve React state bugs, fix Next.js hydration errors, and clean up bloated Tailwind files. I recently helped a client boost their Lighthouse score from 45 to 90+. Message me, and I’ll gladly share before-and-after examples relevant to your project!
Reviews
1 reviews for this Gig
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Understood my tasks clearly and helped me untangle my spaghetti code in a very structured and efficient way. The implementation was technically clean, well thought out, and delivered quickly. Communication throughout the process was smooth, responsive, and easy to follow. In addition, they identified...
$200-$400
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10 days
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Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
D dominikgraf707
Switzerland
Understood my tasks clearly and helped me untangle my spaghetti code in a very structured and efficient way. The implementation was technically clean, well thought out, and delivered quickly. Communication throughout the process was smooth, responsive, and easy to follow. In addition, they identified...
$200-$400
Price
10 days
Duration
A Seller's Response
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