We Build the Engine Behind the Storefront.
A storefront is the part your customers see. Underneath it sits the part that actually runs the business: catalog and pricing logic, inventory that stays accurate, checkout that doesn’t fail under load, and the payment, tax, shipping and fulfillment systems tying it all together. That’s the layer 3Shadz engineers.
Commerce Software That Has to Work Under Real Load, Not Just in a Demo
E-Commerce Development is one of the eight disciplines inside 3Shadz Software Engineering: the practice of building the systems that let a business sell online reliably, at whatever scale it operates at.
It covers the storefront customers browse, the checkout and payment flows that have to work every single time, the catalog, pricing and inventory logic behind every product page, and the order, fulfillment and marketplace integrations that turn a purchase into a shipped package.
Some engagements start with a new platform built from scratch. Others start with a store already live on an established platform that needs to integrate, scale or migrate. Either way, it’s treated as one connected system, not a stack of disconnected plugins.
An established platform, themed and configured for a fast, reliable launch.
A decoupled storefront in front of commerce, search and payment layers you can swap independently.
A commerce engine built from the ground up around workflows no off-the-shelf platform supports.
We don’t default to one point on this spectrum. The right one depends on your catalog complexity, transaction volume, and how much of the experience genuinely needs to be yours.
E-Commerce Engineering Capabilities
Every commerce build touches some part of this map, from the interface a customer taps through, to the systems that quietly keep pricing, stock and orders correct behind it.
Storefront & Frontend Commerce Engineering
Fast, accessible storefronts and product experiences, from themed builds on established platforms to fully custom React and Next.js storefronts backed by a headless commerce layer.
Checkout & Payments Engineering
Checkout flows engineered to convert and to work every time, with multi-gateway payment integration, wallets and fraud checks built in.
Catalog, Pricing & Inventory Systems
Product catalogs, variant and bundle logic, and pricing rules connected to inventory that stays accurate across every channel you sell on.
Order Management & Fulfillment
Order orchestration connected to your warehouse, 3PL or fulfillment partners, with returns and exchanges handled as part of the system.
Marketplace & Omnichannel Selling
Selling consistently across your own storefront, marketplaces and in-store point of sale, with stock, pricing and orders kept in sync everywhere.
Search, Personalization & Merchandising
Product search, filtering and recommendation logic engineered to help customers find what they’re looking for, not just what’s newest.
Platform Integration, Migration & Modernization
Connecting a commerce platform to ERP, CRM, accounting and marketing systems, or migrating an existing store to a new platform without losing orders, history or SEO.
Performance & Peak-Traffic Engineering
Caching, load testing and infrastructure sized for the traffic spikes that matter most: launch day, flash sales and seasonal peaks.
Commerce Platforms Built to Hold Up on Your Busiest Day
We engineer for the traffic spike, not just the launch demo: checkout and catalog performance are load-tested before a sale goes live, not discovered during one.
A Delivery Path Built Around Launch Day, and Every Sale After It
The same disciplined path carries every commerce engagement, whether we’re shipping a new storefront or scaling one that already sells every day.
Discover & Map Commerce Flows
DiscoveryUnderstand how customers buy, how orders move, and which systems already touch the sale before any architecture is drawn.
Architect the Platform
ArchitectureDesign the storefront, catalog, checkout and integration layers as one system, sized for your transaction volume.
Build Storefront, Catalog & Checkout
BuildEngineer the customer-facing experience alongside the pricing, inventory and payment logic underneath it.
Integrate Payments, Tax, Shipping & Systems
IntegrationConnect gateways, tax engines, carriers, and the ERP or CRM systems your operations already run on.
Load-Test for Peak Events
QASimulate real sale-day traffic against checkout and catalog before it matters, not after.
Launch & Monitor
LaunchControlled go-live with monitoring on orders, payments and infrastructure from minute one.
Optimize Conversion & Scale
GrowthFeed real purchase and traffic data back into the platform as the business grows.
E-Commerce Engineering That Survives Contact With Real Customers
A storefront that works in a walkthrough and a storefront that works on your busiest sale day are two different engineering problems. Here’s how we close that gap.
Engineered as a System, Not Assembled from Plugins
Storefront, catalog, checkout and fulfillment are designed to work together from day one, instead of being stitched from disconnected add-ons that quietly conflict.
Built for the Sale Day, Not Just the Demo Day
Load testing against realistic traffic and order volume is part of the build, so performance isn’t a surprise on the one day it matters most.
Integration-First
We design around the payment, tax, shipping, ERP and CRM systems you already run, rather than asking you to replace them to work with us.
Conversion & Performance Are Requirements, Not Nice-to-Haves
Page speed, checkout friction and mobile experience are treated as engineering requirements from the architecture stage, not a pass at the end.
Your Data, Your Infrastructure
Customer, order and catalog data live in infrastructure and accounts you own, so the platform stays yours to run, extend or move.
One Team, From Architecture to Post-Launch Support
The same engineers who design the platform build, test and support it after launch, through every sale and season that follows.
Platforms and Systems We Build Around
We choose the commerce platform and the integrations around it based on your catalog, volume and operations, not a fixed toolset.
Commerce Platforms & Frameworks
Systems We Integrate
E-Commerce Development: Frequently Asked Questions
Retail & E-Commerce, under Industries, describes how our full range of services applies specifically to retail and commerce businesses. E-Commerce Development, under Services, is the underlying engineering discipline itself: the storefront, checkout, catalog, order and integration work we do for commerce platforms across every industry we serve, not retail alone.
Both. We work across the full spectrum, from configuring and extending established platforms, to headless and composable builds, to fully custom commerce engines. The right point on that spectrum depends on your catalog complexity, transaction volume and how much of the experience genuinely needs to be yours.
Yes. Payment gateway, tax engine, shipping carrier and ERP or CRM integration is one of our core capabilities, whether that’s added to an existing storefront or engineered in from the start of a new build.
Caching, autoscaling infrastructure and load testing against real sale-day traffic patterns are part of the build itself, not a step we add after something goes down. Checkout and catalog performance are tested before a launch or sale event, not discovered during one.
Yes. Platform migrations typically run as a phased, parallel cutover (product, customer and order data validated on the new platform before traffic moves over), so the store stays live and searchable throughout.
Fixed-scope delivery, a dedicated engineering team embedded with yours, or staff augmentation to extend your existing team: see Engagement Models for details, or talk to us about what fits your platform.
Let’s Turn Your Storefront Into a Commerce Platform That’s Built to Sell at Scale.
Whether you’re launching a new store, integrating payments and fulfillment into an existing one, or migrating off a platform you’ve outgrown, our E-Commerce Development team can help you build it right.