AppexTECHNOLOGY
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Custom software for e-commerce & retail

E-commerce becomes a custom software problem at the point where the product or fulfilment model stops matching what hosted platforms assume. Appex Technology builds headless storefronts, subscription commerce, and inventory and fulfilment integrations for retail and DTC brands — with performance treated as a conversion requirement, because for consumer traffic it is one.

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The problem

What tends to get in the way

Platform fees scale with success

Transaction percentages and app subscriptions grow with revenue rather than with the value delivered.

Templates constrain the experience

Differentiated merchandising or configuration is frequently the thing a hosted theme cannot express.

Page speed costs revenue

App and script bloat slows storefronts, and bounce rate follows load time closely.

Inventory lives in several places

Storefront, warehouse, and accounting each hold a slightly different count.

What we build

Systems built for this sector

  • Headless storefrontsCustom front ends on a commerce backend, so the experience is not bounded by a theme.
  • Subscription commerceRecurring orders, trials, proration, and dunning handled properly at the edges.
  • Product configuratorsComplex, made-to-order, or bundled products that standard catalogues cannot model.
  • Inventory and fulfilmentIntegrations with warehouse, 3PL, and shipping providers so stock counts agree.
  • B2B wholesaleAccount pricing, quotes, and purchase-order flows alongside the consumer storefront.
What shapes the build

Constraints we design around

These shape architecture from the start. Retrofitting them later is consistently more expensive than designing for them up front.

  • PCI scope, kept minimal by leaving card handling with the processor
  • Sales tax and VAT calculation across the jurisdictions you sell into
  • Consumer data and privacy obligations, including cookie consent where applicable
  • Accessibility, which is both a legal exposure and a conversion factor
  • Peak-season load, which needs planning before the season rather than during it
Where to start

Services that apply here

B2C Product Engineering

Consumer-facing products built for speed, conversion, and growth — from MVP to scale.

Open-Source Platform Customization

We customize and self-host mature open-source platforms so you own your stack, skip per-seat SaaS fees, and ship in weeks, not quarters.

APIs & Integrations

Custom REST and GraphQL APIs, webhooks, and integrations that connect your software to the tools, payments, and data you already use.

Often built with

Platforms that fit this sector

Medusa

Headless commerce for fully custom B2C and B2B storefronts, subscriptions, and checkout.

Replaces Shopify Plus

Saleor

GraphQL-native commerce for complex catalogs, multi-channel, and enterprise storefronts.

Replaces commercetools

Vendure

A Node/TypeScript commerce framework for highly custom B2B and B2C shops.

Replaces BigCommerce

PostHog

Product analytics, session replay, and feature flags — all self-hostable and privacy-friendly.

Replaces Amplitude, Mixpanel

Meilisearch

Fast, typo-tolerant instant search you host yourself — no per-search billing.

Replaces Algolia

FAQ

E-commerce & Retail — common questions

Should we move off Shopify?+
Not automatically. Shopify is genuinely good for standard retail, and leaving it has real costs. Moving makes sense when your product model does not fit its catalogue, when subscription or bundling logic exceeds what apps can do, when transaction and app fees at your volume have overtaken build cost, or when the storefront experience is itself part of your differentiation. Otherwise staying is the better call, and we will tell you that.
What is headless commerce?+
Separating the storefront from the commerce backend: the backend handles catalogue, cart, orders, and payments through an API, while the front end is fully custom. You gain complete control over experience and performance, at the cost of needing developers for front-end changes rather than editing a theme.
Can you handle subscriptions?+
Yes. The straightforward part is charging on a schedule; the real work is at the edges — trials, upgrades and proration, pauses, failed-payment dunning, and refunds. We design those cases explicitly, because they are where subscription systems usually break.
How do you keep inventory accurate across systems?+
By deciding which system owns stock counts and syncing outward from it, rather than letting several systems each hold their own number. Most inventory drift is an unresolved ownership question rather than a technical failure.
Does site speed really affect sales?+
For consumer traffic, materially — load time correlates strongly with bounce and conversion, and Core Web Vitals also feed search ranking. We treat performance as a build constraint rather than a later optimisation pass, since retrofitting it is much more expensive.
Related reading

More on this sector

Beyond Shopify: When E-commerce Brands Need Custom Development

When to move beyond Shopify or WooCommerce to custom and headless commerce — the signs, the options (Medusa, Saleor), and what you gain by owning your storefront.

Headless CMS vs WordPress: Which Should You Choose?

Headless CMS vs traditional WordPress — how they differ on performance, security, flexibility, and SEO, and which fits your project in 2026.

Integrating Stripe Into a Custom App: A Practical Guide

How to add Stripe payments to a custom application the right way — one-time payments vs subscriptions, webhooks, and the pitfalls that break billing.

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Building for e-commerce & retail?

Tell us about your process and current systems — we'll scope it and send a fixed estimate before any work starts.

Start a projectinfo@appextechnology.com