Full-Stack React Node js developer needed to diagnose & fix dashboard performance issues.

I'm looking for an experienced Full-Stack Developer to investigate and improve the loading performance of an existing web application dashboard. Some users are reporting slow dashboard loading, while the issue is not consistently reproducible for everyone. I need someone who can properly diagnose the bottleneck instead of simply applying frontend optimizations blindly. The work may include: Profiling dashboard loading performance Reviewing frontend rendering and React performance Checking API response times and unnecessary requests Identifying slow database queries Reviewing network waterfalls and browser performance Optimizing data fetching and caching Reducing unnecessary re-renders Improving large dataset handling Checking server/backend performance Finding user-specific or environment-specific performance issues Providing clear recommendations and implementing fixes Hope to cooperate with someone comfortable working with an existing production codebase and debugging performance across the full stack.