Oct 2018 – Jan 2021

Multi-Tenant E-commerce Platform for Retailers

GrocerKey · Full Stack Developer

Multi

Tenant Platform

White

Label Storefronts

Omni

Channel Fulfillment

∞

Retailers Enabled

Growth & Stability

~60%

API Response Time Reduced

30+

Manual Workflows Eliminated

1000s

Real-time Synced Users

Overview

At GrocerKey, I contributed to building a multi-tenant e-commerce platform that enabled traditional brick-and-mortar retailers to launch scalable online stores and compete with major platforms. The system provided white-label storefronts, omnichannel capabilities, and enterprise-grade features on a shared infrastructure.

The Problem

High cost and complexity of building custom e-commerce platforms

Difficulty competing with large platforms like Walmart and Amazon

Lack of integration between online stores and physical inventory

Limited scalability during peak shopping periods

Need for customizable branding across multiple retailers

The Solution

Enabled multiple retailers to operate on a shared infrastructure

Built white-label storefronts for brand customization

Integrated online and in-store inventory systems

Added advanced checkout and fulfillment options

Improved scalability and performance

Architecture

Core Components

Multi-tenant architecture with data isolationConfigurable storefront system (white-label)Inventory synchronization across channelsCheckout and fulfillment engine (delivery, pickup)Integration layer for retail systems

Technical Design

Backend services in .NET

Frontend components using Aurelia

Caching layer using Redis

Search and analytics using Elasticsearch + ELK

Performance optimization for high traffic

Multi-tenant data isolation

Production error monitoring and alerting with Sentry

My Role: Full Stack Developer

Enhanced multi-tenant architecture and scalability

Built configurable storefront components

Implemented inventory synchronization systems

Developed checkout and fulfillment features

Integrated retail management systems

Optimized performance for peak traffic loads

Contributed to search and analytics features

Key Achievements

🔥

Strengthened multi-tenant architecture for multiple retailers

🔥

Enabled white-label storefront customization

🔥

Integrated omnichannel inventory and fulfillment

🔥

Improved scalability for peak shopping periods

🔥

Delivered enterprise-grade e-commerce features

Impact

📊

Enabled retailers to launch online stores quickly

📊

Reduced cost of building custom e-commerce solutions

📊

Improved performance during high-traffic periods

📊

Enhanced customer experience with flexible fulfillment options

📊

Increased competitiveness of brick-and-mortar retailers

Tech Stack

Backend

C#, .NET

Frontend

JavaScript, Aurelia

Cloud

Azure

Data

SQL Server, Redis

Elasticsearch, ELK

DevOps

Azure DevOps, CI/CD

Observability

Sentry (production error monitoring)

What I Help With

Scalable Backend Systems

High-performance APIs and microservices

Complex Integrations

Stripe, Shopify, Microsoft Graph, telecom

AI & Automation

LLM workflows, document processing

Identity & Security

OAuth, Entra ID, Cognito

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