How we revolutionised the checkout process while maintaining a complex eCommerce ecosystem

65% checkout completion improvement • 40% faster page loads • 99.9% uptime

When your eCommerce platform is the lifeblood of your business, you need more than just developers — you need partners who understand the intricate balance between performance, user experience, and business continuity.

Our client in a sensative health care market came to F12 Consult with a challenge: their Umbraco-based eCommerce site with Ucommerce integration was functional but failing to convert visitors into customers. Cart abandonment rates were sky-high, and the checkout process was a maze of frustration for users.

We didn't just fix it — we transformed it.

The Challenge: When legacy meets modern expectations

The existing platform faced multiple interconnected challenges that were impacting business growth:

Technical Debt

•       Legacy checkout process built with outdated jQuery and server-side rendering

•       Slow page loads causing high bounce rates

•       Monolithic architecture making updates risky and time-consuming

•       Inconsistent mobile experience losing valuable customers

Business Challenges

•       68% cart abandonment rate — well above industry average

•       Complex product catalog with thousands of SKUs and variants

•       Multiple payment gateways and shipping providers to coordinate

•       Need for real-time inventory management across multiple warehouses

Operational Constraints

•       24/7 operation requirement — no room for downtime

•       Peak season traffic spikes causing performance issues

•       Content team needed to manage site without developer intervention

Why they chose F12 Consult

The client needed a team that could handle both immediate firefighting and long-term strategic improvements. F12 Consult stood out because of our:

•       Deep Umbraco expertise: Certified developers with years of CMS experience

•       eCommerce specialization: Proven track record with Ucommerce and complex integrations

•       Modern development skills: React expertise for building performant user interfaces

•       DevOps capabilities: Ensuring zero-downtime deployments and continuous improvement

The Solution: A three-phase transformation

We approached the project with a strategic three-phase plan that would minimize disruption while maximizing impact.

Phase 1: Stabilization & Support

First, we had to ensure the platform was stable and maintainable:

•       24/7 monitoring: Implemented comprehensive monitoring with automated alerts

•       Performance optimization: Database tuning, caching strategies, and CDN implementation

•       Security hardening: Updated all dependencies and implemented security best practices

•       Documentation: Created comprehensive documentation for the existing system

Phase 2: React Checkout Revolution

The centerpiece of our transformation was completely reimagining the checkout experience:

Architecture Design:

•       Decoupled React frontend communicating via RESTful APIs

•       Micro-frontend architecture for independent deployment

•       State management with Redux for predictable data flow

•       Progressive Web App features for app-like experience

User Experience Enhancements:

•       Single-page checkout reducing steps from 5 to 1

•       Real-time validation with inline error messaging

•       Smart address lookup with autocomplete

•       Guest checkout option with social login integration

•       Mobile-first responsive design

Payment Integration:

•       Multiple payment gateways (Stripe, PayPal, Apple Pay, Google Pay)

•       PCI DSS compliant tokenization

•       3D Secure 2.0 authentication

•       Saved payment methods for returning customers

Phase 3: Continuous Enhancement

With the new checkout in place, we focused on continuous improvement:

•       A/B testing framework: Data-driven optimization of conversion rates

•       Analytics integration: Google Analytics 4, heat mapping, and custom event tracking

•       Performance monitoring: Core Web Vitals optimization and real user monitoring

•       Feature rollout: Wishlist, product recommendations, and loyalty program integration

Technical Architecture

The modernized architecture leverages best-in-class technologies while maintaining compatibility with existing systems:

The Results: Transformation by the numbers

The impact of our work has been transformational across every metric that matters:

Business Impact:

•       Revenue growth: 45% year-over-year increase in online sales

•       Customer retention: Return customer rate improved by 30%

•       Operational efficiency: Content team can now manage 90% of updates without developer support

•       Market expansion: Successfully launched in 3 new international markets

Ongoing Support & Maintenance

Our partnership continues with comprehensive support services:

•       24/7 monitoring: Proactive issue detection and resolution

•       Monthly updates: Security patches and performance optimizations

•       Feature development: Continuous enhancement based on user feedback

•       Peak season support: Additional resources during high-traffic periods

•       Strategic consulting: Quarterly reviews and roadmap planning

"F12 Consult didn't just rebuild our checkout — they transformed our entire eCommerce operation. The React checkout is lightning fast, our conversion rates have skyrocketed, and we finally have a platform that can scale with our ambitions. They're not just developers; they're true partners in our success."

— Chief Technology Officer

The bottom line

When you're running an eCommerce platform, every second counts and every click matters. We took a struggling Umbraco and Ucommerce platform and transformed it into a high-performance revenue engine.

By combining deep platform expertise with modern development practices, we delivered a solution that not only solved immediate problems but positioned the client for long-term growth. The new React checkout has become a competitive advantage, turning browsers into buyers and first-time customers into loyal advocates.