Site Speed Expert Needed for Audit (NextJS, Vercel, Supabase Stack)

We are building a web-based fintech platform using NextJS, Vercel, and Supabase and facing some speed issues. We are looking for an EXPERT to help us speed up the platform. We have already covered the basics + Claude recommendations. Please only apply if you are an expert in this field. Details below: Own end-to-end latency for a Next.js 16 trading platform (App Router, RSC, PPR/Cache Components) running on Vercel Fluid Compute over Supabase Postgres — profiling render and data paths, tuning function regions and DB co-location, caching, cold starts, and query/index/RLS cost. Must be fluent in percentile-based measurement (p95/p99, never averages) across edge logs, runtime traces, pg_stat_statements/EXPLAIN, and browser profiling — and able to trace one symptom from the browser, through the function, down to the query.