Scale Event Marketplace Full-Stack Build

I’m spinning up a large-scale event marketplace and need a full-stack engineer who’s already walked this road. The core build looks like this:

• Robust user registration and profile system that relies on email sign-up first; social or phone options can follow later, so the architecture has to stay flexible.
• Seamless payment processing with Stripe (credit/debit cards) and PayPal from day one, written so that adding crypto gateways later won’t require a rewrite.
• Organizer-friendly event management tools—create, edit, publish, ticket tiers, capacity limits, analytics, the usual essentials—exposed through a clean dashboard and mirrored by solid APIs for mobile apps.

I’m looking for production-ready code, clear documentation, and a path to scale (think multitenant database strategy, caching, CI/CD). If you’ve shipped something similar, let’s dive into your stack choices, previous metrics, and how you’d break the milestones from MVP to launch.