Next.js + Supabase Developer – Client Portal Bug Fixes

We need a developer to fix bugs in an existing client portal built with Next.js and Supabase. The work includes resolving issues with user authentication, improving page performance, and ensuring the portal runs smoothly across devices. You should be comfortable reviewing the current codebase, identifying problems, and implementing reliable fixes. This is a short-term project for someone who can work independently and communicate clearly throughout the process.