B2B E-Commerce Platform

TC Representações is a B2B wholesale platform for construction materials, built for Thiago Carvalho, an independent commercial representative from Mococa, SP who manages partnerships with six brands: Avant, Colson, Irwin, Kalipso EPI, Marluvas, and Termolar. The platform is a deliberate hybrid: a public institutional site for any visitor, and a gated private storefront where access to pricing requires owner approval.

The Constraints

• Solo greenfield project with no design system, no existing codebase, and a strict infrastructure budget
• B2B pricing carries business rules more complex than a standard e-commerce model, requiring a purpose-built pricing engine
• The catalog spans ~2,000 SKUs across multiple brands and must support large bulk updates
• Retailer access is intentionally restricted, protecting negotiated prices from competitor visibility

Storefront

Built the complete SPA with React 18 and Vite:

• Public side: landing page, brand showcase, and contact form, visible to any visitor

Home page: institutional content for public visitors, login for approved retailers

Brand showcase: public page listing the six represented brands, open to any visitor

• Gated side: registration with email confirmation, manual owner activation, then access to the full catalog

Retailer registration: business credentials collected up front, activation held for owner approval

• Infinite-scroll product catalog segmented by brand, restricted to authenticated and approved retailers
• Cart → Quote → Order flow with per-brand separation and automatic quote expiration

API & Backend

Designed the REST API following Clean Architecture with a DDD-inspired domain layer:

• Custom pricing engine built to reflect the business's specific B2B rules; prices are computed at quote time from per-customer configurations
• Reliable bulk product import pipeline built to handle large catalog updates
• Deployed on AWS with Docker, product images served through CloudFront CDN

Technologies

• React + Vite: SPA storefront and gated customer portal
• Redux Toolkit + React Query: auth state and server-state management with caching
• Node.js + Express: REST API with Clean Architecture layering
• TypeORM + PostgreSQL: persistence with repository pattern
• AWS S3 + CloudFront: product image storage and CDN delivery
• Docker: containerized deployment on EC2
• Sentry: production error tracking