Backend Developer for App Issues

I'm seeking an experienced backend developer to resolve several critical issues with my full-stack JavaScript/TypeScript application. The app, built using Next.js 13+ with the App Router, is experiencing multiple problems related to authentication, connectivity, login, and overall responsiveness.

Key Requirements:
- Fix user sign-up and login failures, session expiry problems, and buttons stalling out.
- Resolve database connection errors and API endpoint failures.
- Address login issues such as incorrect error messages, timeouts during login, and password reset failures.
- Improve app responsiveness and speed.

Technical Stack:
- Next.js for both frontend and backend using React framework.
- TypeScript for type safety.
- API Routes located in the /app/api/ directory.
- Supabase for PostgreSQL database with built-in authentication.
- Server Components for server-side rendering in Next.js.

Ideal Skills and Experience:
- Strong expertise in Next.js and React for full-stack development.
- Proficiency in TypeScript and JavaScript.
- Experience with Supabase or similar database services.
- Ability to troubleshoot and resolve complex authentication and connectivity issues.
- Familiarity with server-side rendering and API route management.

If you have the skills to tackle these challenges and improve the performance and reliability of my application, I would love to hear from you.