GrocerKey — Customer Web API

Backend (C# .NET)

About

Customer-facing REST API powering GrocerKey's multi-retailer grocery storefronts — handling product catalog, search, pricing, promotions, cart/checkout, order tracking, and loyalty integration for millions of shoppers.

My Role

Built and maintained the primary customer API with ASP.NET Core 2.1: CQRS pattern with Commands and Queries, Entity Framework data access, Redis caching, ElasticSearch-powered product search, and Stripe payment integration.

Core Capabilities

• Product catalog with search, pricing, and promotions
• Cart and checkout with Stripe payment processing
• Order tracking and delivery slot scheduling
• Loyalty points integration and coupon management
• ElasticSearch-powered product search and filtering
• Multi-tenant support across 10+ retailer configurations

Architecture

• ASP.NET Core 2.1 with CQRS pattern (Commands + Queries)
• Entity Framework 6 + EF Core for SQL Server data access
• Redis caching for high-traffic endpoints
• ElasticSearch integration for product search
• Stripe and GlobalPayments for payment processing

Tech Stack