Stuck on a payment or Supabase integration? I fix it for you — 48h delivery. You own a product that needs to accept payments (iyzico, PayTR, Stripe) or enforce Supabase Row Level Security — but the integration is blocking you and Google/StackOverflow answers don't fit your codebase. I take it off your hands. What you get Working, verified patch in your repo (you share a link or zip — read access only) Root-cause explanation written for your stack Go-live checklist: test mode → live mode, callback URL, signature/hash verification Security notes: amount tampering, IDOR, auth (RLS) gaps specific to YOUR code Common issues I fix iyzico: 1007 / 1009 / invalid signature, PayWithIyzico returns null, 3DS callback loops, IYZWSv2 auth header PayTR: callback not marking orders paid, hash mismatch, production go-live (tavuk-sepeti-style tasks) Supabase: RLS "permission denied", cross-user/cross-tenant data leaks, missing policies Stripe: webhook verification, idempotency, subscription lifecycle How it works Buy and email me your repo link/zip + the exact error + target: test mode or live. I reproduce, patch, and reply with the diff + explanation + go-live checklist within 48h. You test; if something still fails, I keep helping (2 follow-up rounds included). No monthly fee. Pay once, get your integration unblocked.