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I will fix react js bugs and javascript errors tailwind CSS and UI specialist
Montasir B.
About this gig
Fix React JS bugs, JavaScript errors, and Tailwind CSS issues. Professional, fast, and SEO-optimized.
Stop losing users to crashing apps and broken layouts. Most "bug fixes" are just temporary patches that lead to more issues. To truly rank in 2026, your website needs a permanent architectural solution.
I am a React Specialist focused on deep-root debugging and frontend optimization. I fix the "Content Gaps" most ignore: accessibility (a11y) failures, performance bottlenecks, and scalable design systems.
What I Solve:
- React & Logic: Fixing state management, Hook glitches (useEffect), and API failures.
- Tailwind & UI: Resolving broken responsiveness, alignment shifts, and pixel-perfect inconsistencies.
- Performance: Optimizing slow components and Core Web Vitals to boost SEO.
- Accessibility: Fixing a11y gaps to ensure WCAG compliance -a high-demand niche.
Bonus: Message me for a Free Code Audit. I'll identify the root cause and provide a strategy to prevent future regressions.
I build clean. I fix for good. Lets get your project back on track.
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Get to know Montasir B.
Montasir B.
React frontend and full stack MERN developer
- FromBangladesh
- Member sinceOct 2022
- Avg. response time1 hour
Languages
English
I’m a Full Stack Developer specializing in React, Next.js, and the MERN stack. I transform Figma designs into pixel-perfect, responsive websites and scalable MVPs.
Whether you need a SaaS dashboard, E-commerce storefront, or a custom web application, I focus on clean code, SEO optimization, and high performance.
My Stack:
Frontend: React, Next.js (App Router), JavaScript, Tailwind CSS.
Backend: Node.js, Express.js, MongoDB, Firebase.
I prioritize transparency and fast delivery. Let’s build your vision!
Portfolio: montasirbillah.vercel.app
My Portfolio
FAQ
Should I contact you before placing an order?
Yes, please! Every bug is unique. Please send me a message with a screenshot or a brief explanation of the issue so I can analyze your React code and give you an exact price and timeline before we start.
What do I need to provide to get started?
To fix the issue quickly, I will need access to your source code (via GitHub, GitLab, or a ZIP file) and instructions on how to reproduce the bug. If the site is live, a link helps too!
Do you fix backend (Node.js) issues as well?
Yes! As a MERN Stack Developer, I can handle frontend issues in React/Tailwind as well as backend errors in Node.js, Express, and MongoDB. If you have an API integration or server error, I can fix it.
Can you fix layout issues that only appear on mobile devices?
Absolutely. Fixing responsive design issues is my specialty. Whether your Tailwind CSS grid breaks on mobile or elements overlap on tablets, I will ensure your site looks perfect on all screen sizes.
How long does it usually take to fix a bug?
For most CSS and small JavaScript bugs, I can deliver within 24 hours (often sooner). For complex logic or major performance optimization, I will provide a custom delivery time after reviewing your code.
