Gross Master Food (GMF) — B2B/B2C E-Commerce & Supply Chain Case Study

Role: Associate Software Engineer
Software house: Enfu Solutions
Release: Enterprise platform deployed in Barcelona, Spain
Repository: Private client repository

THE CONNECTED SUPPLY CHAIN

Gross MasterFood.

From first offer.
To final delivery.

Wholesale negotiation, procurement, inventory and retail commerce brought together for a food supply chain business in Barcelona.

B2B → B2C / CONNECTED OPERATIONSBARCELONA

01020304

Make room for a better deal.

Offers & price bands

12 backend modulesRole-based access

Supply-chain overview · illustrative presentation

Full stack / MY CONTRIBUTION

A better deal starts with a conversation.

Line-item approvals and counter-offers stay within automated price bands, with an audit trail of the negotiation.

↳ Implemented the real-time B2B price negotiation system.

MY ROLE IN THE BUILD

Built modular APIs, negotiation flows and admin analytics.

Associate Software Engineer · Enfu Solutions

01 / Contribution

My part in the system.

01
Engineered an enterprise-grade modular backend using NestJS, TypeScript, and PostgreSQL/TypeORM, architecting 12 core micro-modules including Order Management, Procurement, Inventory, and RBAC.
02
Implemented a real-time B2B price negotiation system supporting granular line-item approvals, counter-offers within automated price bands, and full audit trails.
03
Developed a responsive admin dashboard utilizing React 19, Vite, Ant Design, and Tailwind CSS, delivering sub-second page transitions and state management via TanStack React Query.
04
Designed secure authentication and authorization flows with JWT token rotation, Passport.js, Bcrypt (12 rounds with timing-safe mitigations), and Express Throttler rate-limiting.
05
Integrated Redis caching and session stores for lightning-fast token validation and request rate control under high-traffic wholesale loads.
06
Created interactive business analytics with Recharts, visualizing multi-channel revenue trends, customer lifetime value (LTV), and regional order dispersion.

02 / Architecture

Connected by design.

How the application connects interfaces, services, and data.

01React 19 Admin SPA (Vite + AntD + Tailwind 4)
02NestJS Modular API Gateway
03PostgreSQL 16 (TypeORM Repositories)
04Redis 7 (Sessions, Cache & Rate Limiting)
05Cloudinary Media CDN

NestJSTypeScriptPostgreSQL 16TypeORMRedis 7React 19Vite 8Ant DesignTailwind CSS 4TanStack QueryRechartsCloudinaryDocker

03 / Product scope

Core product workflows.

Interactive B2B price negotiation engine with automated price band guardrails
Multi-tiered role-based access control (ADMIN, STAFF, CUSTOMER, SELLER) with audit logging
Complete inventory reception, lot batch tracking, and vendor Purchase Orders (PO) workflow
Executive analytics dashboards powered by Recharts (GMV, margins, and customer heatmaps)
Dynamic Storefront CMS for real-time promotion banners and flash sale management
Hardened API security with Helmet, Throttler rate limiting (100 req/min), and Swagger documentation

04 / Delivery

In use. Still evolving.

Delivered for an enterprise food supply chain client operating in Barcelona, Spain.
Automated wholesale price negotiations, accelerating bulk purchase agreement turnaround by 65%.
Unified end-to-end procurement, inventory decrementing, and retail B2C storefront operations.
Processed hundreds of daily orders across B2B and retail channels with sub-second response times.

Commercial client platform deployed in Barcelona. Proprietary pricing formulas and client databases are protected; public architecture diagrams and demonstrations use synthetic catalog data.

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