Website Maintenance & Bug Fixes

I’m looking for an experienced Full-Stack Developer to quickly review, fix, and ensure all functionalities of my web application are working correctly. This is a short-term project with the potential for future work if everything goes well. Responsibilities Identify and fix bugs across the application. Test all existing features and ensure they work as expected. Fix frontend and backend issues. Resolve API integration problems. Improve application performance where necessary. Ensure responsive design works across devices. Deliver clean, well-tested code. Required Skills React.js Next.js Node.js JavaScript / TypeScript REST APIs MongoDB or PostgreSQL Git & GitHub Debugging and troubleshooting Nice to Have Experience with OpenAI API integrations Firebase or Supabase Payment gateway integrations (Stripe, Paystack) Ideal Candidate Strong problem-solving skills. Can work independently. Fast communicator. Available to start immediately. Pays attention to detail and thoroughly tests their work. Please include examples of similar debugging or maintenance projects you've completed and let me know when you can start.