Sub-Second Headless Commerce & Resilient Flash-Sale Architecture.
We engineer high-performance headless retail platforms, distributed inventory locking engines, and real-time ERP integrations. Built to handle massive concurrent traffic spikes without checkout degradation or inventory overselling.
100k+
Concurrent Checkout Handling
< 50ms
API Response Times
Zero Loss
Overselling Inventory Locks
Speed, Scalability, and Absolute Inventory Integrity.
Black Friday traffic surges demand resilient caching layers, lock-free queues, and real-time ERP data pipelines engineered to prevent checkout downtime.
Headless Microservices Storefronts
Next.js App Router, Medusa, Shopify Plus GraphQL, commercetools
Decoupled, lightning-fast edge storefronts built on Next.js server components with instant page transitions, dynamic partial pre-rendering, and multi-currency internationalization.
- Sub-200ms page transitions with edge-cached product catalogs.
- Custom checkout experiences integrated directly into backend ERP systems.
- Omnichannel content delivery across web, native mobile, and retail kiosks.
High-Volume Inventory Locking & Cart State
Redis Enterprise Distributed Locks, Redlock Algorithm, Apache Kafka
Lock-free distributed reservation queues preventing overselling during flash-sale traffic surges, guaranteeing absolute SKU consistency across concurrent buyer checkouts.
- Optimistic locking primitives preventing double-allocation of limited SKUs.
- High-throughput transactional queue settlement capable of 100k+ cart updates/min.
- Automated cart reservation expiration and graceful stock replenishment.
Real-Time ERP & WMS Integrations
SAP, Oracle NetSuite, Microsoft Dynamics 365, Event-Driven Webhooks
Bi-directional event streaming synchronising order state, warehouse picking queues, and supply chain inventory levels with sub-second accuracy.
- Asynchronous webhook ingestion meshes with guaranteed delivery and retry logic.
- Automated stock level updates broadcast to edge caches in real time.
- Full warehouse management system (WMS) pick-pack-ship lifecycle automation.
Global Payment Rails & Fraud Scoring
Stripe, Adyen, Apple Pay, Google Pay, Sift, Sub-Second 3D Secure
Resilient multi-gateway payment processing infrastructure supporting localized payment methods, smart failover routing, and frictionless 3D Secure 2.0 checkout flows.
- Smart gateway routing cascading declined payments to secondary providers.
- Sub-second 3D Secure 2.0 biometric challenge authentication.
- Automated machine learning fraud evaluation minimizing chargeback dispute rates.
Rigorous Execution from Inventory Locking to Peak Traffic Launch.
Concurrency & Traffic Audit
Analyzing peak historical traffic, catalog schema bottlenecks, ERP sync delay, and checkout drop-off rates.
Headless Edge Architecture
Next.js App Router storefront topology, GraphQL caching layer, and Redis inventory locking specification.
Storefront & Cart Build
Building modular headless components, high-throughput cart microservices, and ERP webhook pipelines.
Flash-Sale Load Simulation
Stress testing checkout pipelines up to 100k concurrent users, verifying zero overselling under contention.
Production Cutover & SLAs
Zero-downtime DNS migration, 24/7 peak retail monitoring runbooks, and 100% IP transfer under English law.
Ready to Engineer High-Concurrency Retail Platforms?
Schedule a technical consultation with our London eCommerce architecture team. We evaluate your checkout bottlenecks, analyze inventory locking strategies, and build an elastic storefront plan.
Registered Office: Hayes, London, United Kingdom • 1-Day Response SLA under Mutual NDA