Scalable Pet Classifieds Platform

I want to launch a full-featured classifieds website devoted to dog and cat breeds—something in the spirit of petclassifieds.com or puppies.com—yet flexible enough to grow far beyond a simple listing board. The core build must handle high traffic, thousands of concurrent listings, and an intuitive journey for both sellers and buyers on desktop and mobile.

Key platform pillars
• User registration with robust profile pages for breeders, shelters, and private sellers
• End-to-end listing creation and management, including bulk upload and media galleries
• Secure payment processing so sellers can boost posts, reserve deposits, or pay listing fees
• Category hierarchy that starts with Dog and Cat breeds (purebred and cross-references for mixed later)
• Smart search, advanced filters, and location radius so buyers quickly narrow results
• Image-rich detail pages plus a reviews & ratings layer to build trust

The build has to be mobile first, SEO-ready, and AI friendly from the outset. For example, I’d like to explore AI tools that can:
• Auto-tag photos with likely breeds to speed up listing creation
• Flag potential scam wording or duplicate ads
• Recommend similar pets to shoppers in real time

I’m open on the stack—Laravel, Django, MERN, or a headless CMS paired with React/Vue are all possibilities—as long as the architecture scales horizontally and you document the APIs. Please outline:
1. Your proposed tech stack and why it suits a large classifieds site.
2. Past projects that demonstrate you’ve built high-load marketplaces or animal-related portals.
3. A milestone plan covering database schema design, core module rollout, AI layer integration, QA, and launch.

Feel free to highlight any performance, security, or DevOps practices you’d bring to keep the platform fast and resilient. I look forward to seeing examples of your work and hearing how you’d turn this idea into a polished, scalable reality.