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Costco – Modernizing a Global eCommerce Platform

Delivered a lightning-fast, scalable progressive web app for seamless B2B & B2C shopping.

Technology Used:
  • Gatsby.js
  • GraphQL
  • React.js
  • Redux

Case Study

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About Costco

A global wholesale leader renowned for delivering value to both individual consumers and businesses. Costco sought to modernize its legacy e-commerce platform to deliver a high-performance, responsive, and scalable online experience across all customer segments.

Challenges

Performance Limitations
 Slow loading times frustrated users and caused cart abandonment.

Scalability Issues
 Outdated infrastructure faltered during high-traffic periods.

Inconsistent User Experience
 B2B and B2C customer journeys were misaligned and device experiences varied.

Security Concerns
 Legacy systems posed higher risks and struggled to meet modern data protection standards.

Solution: Challenge → Solution → Result

Challenge Solution Result
Slow page loads Built a React-based PWA with Gatsby static rendering and GraphQL data delivery 50% faster page loads
Scalability bottlenecks Deployed using Docker, Kubernetes, AWS, and Akamai CDN Reliable performance during peak demand
Disjointed B2B/B2C UX Designed unified but tailored experiences, with multi-cart and personalized dashboards +32% mobile conversions
Platform rigidity Implemented mobile-first design, GraphQL APIs, and agile deployment Accelerated time-to-market
Ready to Reinvent Your Digital Experience?

ValueCoders ensures faster performance, seamless integrations, and a superior shopping journey.

Tech Stack & Integrations

Frontend: React.js, Gatsby.js

State Management: Redux, Redux-Saga

API Layer: GraphQL

Cloud & CDN: AWS (S3, CloudFront), Akamai

DevOps & Containers: Jenkins, Docker, Kubernetes

Testing: Jest, Cypress

Backend: Integrated seamlessly with Costco’s legacy services

Architecture Overview

A modern, modular architecture powers high performance and secure delivery:

  • React/Gatsby PWA frontend ensures fast, SEO-friendly rendering
  • GraphQL layer delivers optimized data fetching
  • Containerized microservices (Docker + Kubernetes) allow scalable deployments
  • Optimized content delivery via AWS and Akamai enhance global performance

Measurable Results / ROI

  • 50% faster page loads improve engagement and reduce bounce rates
  • +32% mobile conversion uplift from responsive, intuitive UX
  • Accelerated feature delivery, reducing time-to-market for campaigns
  • Increased user retention, thanks to personalized dashboards and simplified shopping flows
  • Improved order accuracy, especially in bulk and B2B purchases

Why ValueCoders?

  • Expertise in React, PWA frameworks, GraphQL, and modern DevOps
  • Agile, collaborative delivery with rapid deployment cycles and CI/CD pipelines
  • Innovative mobile-first design tailored for both consumer and business customers
  • Seamless integration with existing enterprise backend systems
  • Focus on performance, reliability, and security at scale

Client Quote

“ValueCoders transformed our aging platform into a modern, lightning-fast PWA. The seamless experience for both our business clients and individual shoppers – and the performance gains – were truly game-changing.”
– E-Commerce Head, Costco

Want to Transform Your eCommerce Experience?

We can help you achieve faster performance, seamless scalablity, and stronger customer engagement.