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I will fix react, javascript, vite, firebase or supabase bugs quickly
Mathieu
About this gig
Hi! I'm Mathieu, a Full Stack Developer specializing in React, Vite, Firebase and Supabase.
If you're dealing with bugs, errors or performance issues in your web application, I'm here to help. I quickly identify the root cause and deliver clean, reliable fixes without introducing new problems.
I can fix:
-React & JavaScript bugs
-Vite build and runtime errors
-Firebase Authentication & Firestore issues
-Supabase Auth, Database & RLS problems
-API integration errors
-UI/Responsive issues
-Performance bottlenecks
-Console errors & crashes
Why choose me?
-Clean and maintainable code
-Fast communication
-Professional debugging process
-Scalable solutions
-Tested before delivery
Whether you need a quick fix or a complete application review, I'll make sure your project runs smoothly again.
Before ordering, please contact me with a brief description of the issue so I can recommend the best package for your needs.
I look forward to helping you get your application back on track!
Respect third-party rights
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Get to know Mathieu
Mathieu
Full Stack Web Developer, React, Firebase, Supabase, Automation
- FromCanada
- Member sinceJun 2026
- Avg. response time6 hours
Languages
French, English
Hi, I'm Mathieu, a Full Stack Developer from Quebec, Canada. I build fast, modern, and scalable web applications with React, Vite, Firebase, Supabase, and Node.js. I specialize in custom SaaS, business automation, AI integrations, APIs, databases, authentication, and dashboards. My projects include Organix, an AI-powered media organization platform, and PattesQC, a pet management app. I focus on clean code, professional UI/UX, reliable delivery, and solutions that solve real business problems.
My Portfolio
FAQ
What information do you need before starting?
Please send me: -A detailed description of the issue -Access to your source code (GitHub or ZIP) -Error messages or screenshots -Steps to reproduce the bug -Any relevant credentials or test accounts (if required)
Which technologies do you work with?
I specialize in React, Vite, JavaScript, Firebase, Supabase, Node.js, REST APIs, Tailwind CSS and modern web application development.
Can you fix bugs in existing projects?
Yes. Whether your project was built by you or another developer, I can analyze the codebase, identify the issue and implement a reliable fix.
Do you fix Firebase and Supabase issues?
Absolutely. I can troubleshoot Authentication, Firestore, Storage, Realtime Database, Supabase Auth, PostgreSQL queries, Row Level Security (RLS), API integrations and more.
Will you optimize my application's performance?
Yes. I can improve loading speed, reduce unnecessary re-renders, optimize API calls and enhance the overall performance of your React application.
What if the bug is more complex than expected?
If the issue requires more work than initially estimated, I'll explain the situation before proceeding and recommend the most appropriate package or a custom offer.
Do you work with urgent requests?
Yes. If you need your issue fixed as soon as possible, you can select the 24-hour delivery extra or contact me before ordering to confirm my availability.
Will you explain what caused the bug?
Yes. If you'd like, I'll explain the root cause of the issue and provide recommendations to help prevent similar problems in the future.
Is my code and project confidential?
Absolutely. All source code, project files and business information are treated as strictly confidential and will never be shared with third parties.
Should I contact you before placing an order?
Yes, I highly recommend sending me a message first. This allows me to review your issue, answer any questions and recommend the best package for your project.
