Commerce & MarketplacesMedium system

Classified Ads Site

A Craigslist/OLX-style listings site where individuals post ads in categories, buyers contact sellers directly, and the site monetizes through featured placements and paid categories.

Typically bought by: Local media companies, community portals, and founders targeting a vertical (cars, jobs, real estate, pets)

Standard features

Always included in the base price. Every one is built, tested and delivered working.

Ad posting flow with category-specific fields and photo upload
Category tree with attribute-based filters (price, condition, location)
Location-based browsing with radius search and map view
Keyword search with saved searches and email alerts
In-site messaging between buyer and seller (phone masking optional)
User accounts with ad management (edit, renew, mark sold)
Ad expiry and renewal cycles
Featured/urgent/bump-up paid promotions (provider-agnostic payments)
Report-listing and moderation queue with content rules
Favorites/watchlist
Admin panel: categories, users, ads, payments, banned words
SEO-friendly listing and category pages

Popular custom additions

Quoted per feature in the configurator — $50 simple, $150 moderate, $300 complex.

Vertical-specific fields (VIN decode for cars, sqm for property)
Dealer/business accounts with bulk listing imports
Escrow or on-platform checkout for shippable items
AI-based duplicate and scam detection
Auto-moderation with image recognition
Native mobile apps with push alerts for saved searches

Tech stack

Frontend: Next.js + Tailwind CSS
Backend: Node.js API
Database: PostgreSQL (Neon) with PostGIS
Integrations: Payment gateway for promoted ads (Stripe/PayPal/other), Maps & geocoding (Google Maps/Mapbox), Image storage/CDN (S3/R2), Transactional email (Resend/SendGrid)