Powering Exponential Digital Commerce Growth for A Leading U.S. Retailer
Our Clients
Engagement Overview
Our client is a leading U.S. retailer with more than 150 brick-and-mortar locations. During the pandemic, customer behavior shifted hard toward digital-first shopping, but their legacy commerce platform could not keep up. A rigid monolithic PHP architecture, rising maintenance costs, and slow delivery cycles held back critical initiatives like credit financing and omnichannel experiences.
TechBlocks partnered with the client to modernize their core commerce stack and operating model. We decomposed the monolith into a composable architecture with modular services and APIs, embedded security and governance, and stood up a Center of Excellence (CoE) with Pod and Tower structures to drive a true customer-first transformation.
Key Challenges
The retailer hit a critical inflection point. Consumer expectations were rising, but the underlying technology & delivery model were stuck in a legacy pattern.
Manual processes, technical debt, and a rigid platform made it difficult to adapt quickly, launch new capabilities, or compete with digital-native and omnichannel competitors.
Rigid Legacy Platform Blocking Digital-First Strategy
The core commerce platform ran on a monolithic PHP-based architecture that was difficult to change and expensive to maintain. This rigidity limited the ability to pivot to customer-first, digital experiences and made it challenging to introduce new capabilities at the speed the business required.
Slow Feature Delivery & Growing Technical Debt
Feature launches were slow and risky because of tight coupling across the monolith. Every change required extensive regression effort and coordination, which increased cycle times and added to technical debt. This eroded developer productivity and slowed the rollout of initiatives that could drive revenue and customer engagement.
Security Risks & Compliance Pressure
The aging architecture introduced security risks that were harder to manage in a rapidly changing threat landscape. Governance controls were difficult to enforce consistently across the monolith, increasing the compliance burden and making security improvements more reactive than proactive.
Manual Processes & Limited Credit Financing Innovation
Manual workflows and platform constraints made it difficult to support modern credit financing options. Implementing financing across channels was complex and slow, which limited the retailer’s ability to increase cart value, improve conversion, and offer the kind of payment flexibility customers expected.
Approach & Solutions
1. Composable Architecture & Platform Modernization
We replaced the rigid monolith with a composable architecture designed for speed, resilience, and future growth.
- Decomposed the monolithic PHP-based system into a composable architecture built on modular services and robust APIs.
- Isolated core domains such as catalog, cart, checkout, and financing into independently deployable components.
- Implemented a custom headless cart and checkout layer to enable flexible front-end experiences and reduce reliance on rigid third-party tools.
- Reduced complexity in the core platform to make it easier to add new features and integrations over time.
2. Data Engineering & Integration
We ensured data flowed cleanly through the new architecture so customer journeys remained seamless during and after the transformation.
- Mapped critical data flows across the legacy platform, including customer, order, product, and financing data.
- Migrated legacy data into the new services while preserving integrity, history, and reporting needs.
- Rigorously tested data integrations and component interactions to ensure stability and avoid regressions during cutover.
- Validated end-to-end customer journeys through automated and manual testing before scaling traffic to the new platform.
3. Security, Governance, & Compliance by Design
We treated security and governance as first-class design concerns rather than afterthoughts.
- Embedded security controls into the architecture, including authentication, authorization, and data protection mechanisms aligned to best practices.
- Defined governance standards for APIs, services, and data access to ensure consistent policies across the ecosystem.
- Implemented monitoring and alerting to detect anomalies and potential security issues quickly.
- Ensured platform changes followed structured review and approval workflows to maintain compliance without slowing delivery.
4. Operating Model Transformation with CoEs, Pods & Towers
Beyond technology, we transformed how teams worked to sustain the gains from modernization and keep the platform customer-first.
- Established a Center of Excellence (CoE) framework to anchor platform ownership, standards, and best practices.
- Implemented Pod structures as cross-functional teams that included product managers, developers, designers, and QA to deliver end-to-end features with speed and accountability.
- Defined Tower structures to provide architectural oversight, design governance, and customer experience alignment across Pods.
- Used this model to drive cultural change toward experimentation, continuous improvement, and customer-centric decision-making.
Impact & Results
The client shifted from a rigid, costly legacy platform to a modern composable stack and a delivery model built for speed.
The new architecture and CoE operating model unlocked higher e-commerce performance, stronger financing adoption, and significant cost savings, fueling exponential digital growth.
Sales growth
E-commerce sales increased by 51% as the new platform enabled faster feature delivery, better customer experiences, and more resilient online operations.
Higher conversion across digital channels
The retailer achieved a 66% boost in e-commerce conversion rate. Improved performance, smoother checkout, and better financing options encouraged more visitors to complete purchases.
Increase in cart value
Credit applications grew by 47% year over year, and cart value increased by 40% when financing was used. Modernized financing journeys made it easier for customers to say yes to larger baskets.
Surge in online finance applications
Online finance applications increased by 70% as streamlined digital journeys and better integration encouraged customers to adopt financing options without friction.
Annual cost savings
The custom headless cart and checkout contributed to $400K in annual savings on tools and licensing. The retailer gained more control over the experience while reducing recurring platform costs.
E-commerce revenue growth
From 2020 to 2023, e-commerce revenue grew by 179%. The composable architecture and CoE-driven delivery model gave the client a scalable foundation to keep compounding digital growth.
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