Nexus - One platform for the entire investor-founder relationship

I built Nexus — a collaboration platform for investors and entrepreneurs to manage the whole relationship in one place, instead of stitching together a scheduling tool, a video call link, a shared drive, and a payment processor. What's in it: - Role-based dashboards for investors and entrepreneurs - Meeting scheduling with automatic double-booking conflict detection - Video calls over a WebRTC signaling server I built from scratch (Node.js + Socket.IO) - A document chamber for uploading, previewing, and e-signing deal documents - Payments via Stripe — currently sandbox mode, this is a portfolio build, not processing real transactions yet - JWT auth, bcrypt-hashed passwords, role-based route protection throughout The part I'm most confident holds up isn't any single feature — it's that all of it works together as one actual flow: schedule a meeting, join the call, share and sign the document, log the transaction, without leaving the platform. Genuinely looking for feedback, especially from anyone who's used a real investor-founder tool and can tell me where this falls short.