A marketplace. Many moving parts.

Overview

Constract is a multi-vendor marketplace connecting buyers with vendors of building materials and construction products. Kemma Technologies designed and built the platform end-to-end — from product catalog to checkout to vendor operations.

The Challenge

Bringing multiple vendors onto a single marketplace requires more than a storefront. It needs distinct, secure experiences for buyers, vendors and administrators, plus reliable order tracking from checkout through to delivery.

Our Approach

We built Constract on Next.js with Supabase handling authentication and data, implementing role-based access across three distinct portals: a customer-facing storefront with cart and checkout, a vendor dashboard for managing listings and orders, and a super-admin console for platform oversight. Order tracking, profile management and a materials and product catalog service round out the core platform.

Outcomes

• Production-oriented marketplace workflows spanning storefront, checkout, vendor operations and administration
• Distinct authenticated experiences for customers, vendors and admins
• Full order lifecycle implemented from cart and checkout through order tracking