Enhance Travel App Smoothness and Get Rid of Minor Bugs

We are looking for an experienced full-stack developer to improve the performance, smoothness, and stability of our live travel web application.

The platform is already built and live. We need optimization and debugging — not a rebuild.

About the product:
• Travel safety platform with 140,000+ location profiles
• Dynamic city pages with safety scores
• React frontend (Vite)
• Node / Express backend
• Supabase (Postgres)
• Firebase Auth
• Hosted on Railway
• Cloudflare DNS

What we need help with:

Improve UI smoothness and responsiveness

Fix minor lag during navigation

Improve animation fluidity

Reduce layout shifts

Optimize rendering performance

Fix small crashes and stability issues

Occasional frontend crashes

Edge case route failures

Unhandled errors

Improve error handling and fallback states

Bug fixing

Data loading inconsistencies

Minor UI glitches

Routing edge cases

Performance optimization

Improve Lighthouse score

Reduce unnecessary re-renders

Optimize API calls

Improve overall page speed

Requirements:
• Strong experience with React performance optimization
• Experience debugging Node / Express production apps
• Familiarity with Supabase or Postgres
• Experience diagnosing crash logs and stack traces
• Clear communication

Please include:
• Examples of apps you’ve optimized
• Your approach to diagnosing performance issues
• Estimated timeline

This is not a beginner project. We are looking for someone comfortable working on a live production system.