E-commerceHeadlessPerformance

High-Performance Headless E-commerce Platform

1M+ Daily Sessions

Client

Retail e-commerce brand (confidential)

Duration

12 weeks (rebuild + migration)

Team

Tech lead, Frontend dev, Backend dev, DevOps, QA

Situation

The existing storefront struggled during campaigns: slow pages, cart failures, and brittle integrations. The business wanted a modern headless build that could scale without "emergency deploys" during traffic spikes.

Objectives

Improve performance (Core Web Vitals + real conversion impact)
Reduce downtime during promotions
Make integrations resilient (inventory, payments, shipping)
Add security controls suitable for a public, high-traffic target

What We Did

Headless architecture with a performance budget

Rebuilt the frontend with strict budgets for bundle size, render strategy, and caching. Treated performance as a feature.

Integration layer designed for failure

Added retries with backoff, circuit breakers, and queue-based synchronization. Implemented clear user messaging when downstream services degraded.

Security by design

Implemented rate limiting, bot protection, hardened session handling, and separated public storefront from internal admin tools.

Challenges & Solutions

SEO migration risk

Solution: Created redirect maps, tested crawl paths, and staged releases by category.

Campaign "unknown unknowns"

Solution: Ran load tests on real user journeys and fixed bottlenecks (search, PDP, checkout).

Vendor outages

Solution: Implemented graceful degradation so the site stayed functional even when third parties degraded.

Key Outcomes

Uptime improved to 99.99% during peak campaigns
Page load times reduced by 45% on top traffic pages
Conversion rate lift of 15% attributed to speed + stability improvements

Deliverables

Headless storefront + deployment pipeline
Resilient integration services
Security hardening checklist + monitoring

Services Provided

Web developmentScalability engineeringWeb security