My commercial-real-estate finance platform is live on Replit in a closed beta. Before we open the doors, I need a detail-oriented developer / tester to give the build a final polish, stress-test critical workflows, and wire the data into HubSpot so every loan request lands in my pipeline automatically. The core focus is the loan-processing backend. I want you to probe every step—from borrower intake through automated underwriting logic—looking for bottlenecks, calculation errors, or security holes. When you spot an issue, patch it (or propose the fix if it touches business logic) and document what was changed. Once the engine is solid, connect the site to HubSpot. I already have the API keys; what I need is reliable two-way sync so new submissions create deals, status updates flow back to borrowers, and contact records stay aligned without duplicates. Deliverables • Comprehensive bug/edge-case report and corresponding code fixes • Optimized backend loan-processing routines, committed to the existing Replit repo • HubSpot integration script or middleware with clear mapping for deals, contacts, and custom fields • A short hand-off note explaining how to redeploy and maintain the sync Acceptance criteria: zero critical bugs reproducible after your pass, loan files load in under two seconds, and every new application appears in HubSpot with correct field data. If you thrive on squeezing the last 10% of quality out of a product and enjoy API work, let’s get started.