Trading Platform–Security Fix,Feature Completion&Deployment

I have an existing Next.js 15 (App Router) + Prisma + PostgreSQL trading platform. A professional code audit has already been completed. I need an experienced developer to: Fix the critical security issues identified in the audit Complete and correct key financial features (deposits, withdrawals, balances) Implement proper Demo + Real balance support with admin controls Make the trading bots functional in simulated mode Hide/disable unused features Deploy the platform on Vercel Connect my domain Configure my own API keys (Twelve Data, email, etc.) Import the existing database if provided Perform full testing (login, trading, charts, admin, deposits, withdrawals) I will provide the full audit report and source code to the selected developer. Stack: Next.js 15, React 19, TypeScript, Prisma, PostgreSQL, NextAuth, Tailwind Requirements: Strong experience with Next.js App Router + Prisma Good understanding of security (authentication, webhooks, scheduled jobs) Experience with API installations and third-party API integrations Experience with or solid understanding of trading platforms Reliable English communication