Multi-Sided Marketplace Engineering
Buyer, seller, and admin portals on one backend — architected, built, and operated end-to-end, from domain-specific search to Stripe checkout.
What We Deliver
Our engineering systems are designed to match strict quality guidelines, ensuring reliability.
Separate buyer, seller, admin, and operations portals sharing one NestJS/Prisma API — the same pattern running PartsBazar360's 5 portals today.
OpenSearch-backed catalog search with filters built for your actual matching problem — vehicle fitment, trade scope, whatever your buyers need to filter on.
Seller-separated shipping and terms, Stripe Checkout, and role-scoped admin moderation — the trust layer that makes a marketplace usable, not just a listing site.
Tools & Frameworks
The actual stack we run in production — not a generic list of buzzwords.
Why Choose GBC?
We focus on bringing measurable business value, not just code.
Service in Action
Two Live Marketplaces, One Architecture Pattern
PartsBazar360 (auto parts) and Renovessa (home services) both run on the same buyer/seller/admin portal pattern — proof the architecture generalizes across verticals.
- PartsBazar360: 5 portals, OpenSearch vehicle-fitment search, 43,000+ live listings
- Renovessa: guided estimate wizard, one routed RFQ per homeowner, 12 trades covered
- Both live in production today, not portfolio mockups
Ready to Implement Marketplace & Platform Engineering?
Reach out to schedule a consultation with our system developers. We will analyze your specifications and build a custom implementation proposal.