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I will build a modern react next js web app with supabase firebase backend
Toni
About this gig
Need a modern, responsive, and reliable web application built with the right technology?
I'm Toni, a professional web developer with 5+ years of experience building modern websites and full stack web applications using React, Next.js, Supabase, and Firebase
Whether you need a SaaS platform, dashboard, business web app, customer portal, authentication system, or custom web application, I can turn your idea into a clean and functional product.
What I Offer?
- React & Next.js web application development
- Supabase database & backend integration
- Firebase authentication & backend integration
- User login, signup & authorization
- API & third-party integrations
- Responsive design for desktop, tablet & mobile
- Database setup and integration
- Bug fixing and performance improvements
- Deployment and production setup
Why Choose Me?
- 5+ years of development experience
- Clean and maintainable code
- Modern development practices
- Fast and clear communication
- Focus on performance and security
- Reliable support throughout the project
Have an idea or an existing project that needs development? Message me before ordering and tell me what you want to build. Ill help you choose the right approach and package.
Get to know Toni
Toni
fix Firebase auth, Firestore security rules and backend
- FromUnited Kingdom
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English, Spanish, German, Italian
Hi, I’m Toni, a professional web developer with 5+ years of experience building, debugging, and improving modern web applications. I specialize in Firebase Authentication, Firestore security rules, backend issues, React, and Next.js. I don’t just patch problems I find the root cause and deliver clean, reliable solutions. If your Firebase setup is failing, insecure, or simply not working as expected, message me today and let’s get it fixed properly.
FAQ
Can you build a complete web application?
Yes. I can build modern full stack web applications using React, Next.js, Supabase, or Firebase based on your project requirements.
Do you work with both Supabase and Firebase?
Yes. I work with both platforms and can integrate authentication, databases, backend functionality, and other services depending on your application's needs.
Can you build a SaaS application?
Yes. I can develop SaaS dashboards, user authentication, database functionality, protected pages, subscription-related integrations, and other features.
Can you create authentication systems?
Yes. I can implement login, signup, logout, protected routes, user sessions, authorization, and authentication using Supabase or Firebase.
Will my website be responsive?
Yes. I build responsive applications that are designed to work properly across desktop, tablet, and mobile screen sizes
Can you work on an existing React or Next.js project?
Absolutely. I can add new features, integrate Supabase or Firebase, fix bugs, improve functionality, or continue development on an existing project.
Can you connect my database to the application?
Yes. I can integrate your application with Supabase or Firebase and connect the required database functionality to your frontend and backend.
Can you integrate APIs?
Yes. I can connect your application with suitable third-party APIs and services when they are required for your project.
Do you deploy the finished application?
Yes, deployment can be included depending on the package. I can help prepare and deploy your application to a suitable hosting platform.
Should I contact you before placing an order?
Yes. I recommend messaging me first, especially for custom or complex applications. Send your idea, features, or existing project details so I can recommend the right package.
