Full-Stack Developer for Code Audit & Xero Integration

We're seeking a full-stack developer to audit and production-harden our B2B wholesale ordering platform, then integrate Xero for real-time accounting sync. Your responsibilities: Audit React + Express + tRPC codebase for bugs, security issues, and performance Build bidirectional Xero integration: orders sync to invoices, payments sync back to the app Ensure data consistency and error handling across all syncs Verify all tests pass and app is production-ready Requirements: React, Express, tRPC, Drizzle ORM, MySQL, Xero API experience preferred Deliverables: Code audit report, working Xero integration, sign-off confirming production-ready