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Chicago & Midwest • Shopify Plus & Custom Liquid Engineering

Custom Shopify & Plus Development in Chicago & Midwest

Scale your e-commerce brand without monthly app bloat. We build high-converting Online Store 2.0 Liquid themes, custom private apps, enterprise ERP integrations, and headless Hydrogen storefronts for Chicago brands and Midwest manufacturers.

< 1.2s Product Page Load
0 Bloat Apps Needed
+34% Mobile Conversion
9 AM–2 PM Central Time Sync
Schedule Chicago Strategy Call
Shopify Plus Certified Native Liquid Custom Code
Shopify Architecture
Online Store 2.0
Custom Liquid OS 2.0 Zero App Lag

Sections everywhere, custom swatch filters, and native sticky drawer carts.

ERP & 3PL Connectors NetSuite / SAP

Bi-directional inventory sync and automated order routing for Midwest hubs.

Headless Hydrogen Edge Oxygen

Instant sub-500ms transitions and omnichannel checkout architecture.

Midwest Sync: Daily Central Time (CT) Collaboration
Shopify Engineering Tracks

Enterprise Shopify Solutions for Chicago DTC & B2B Brands

We replace bloated monthly app dependencies with clean native Liquid and serverless API connectors that maximize speed, conversion, and margins.

Custom OS 2.0 Themes

Hand-coded Liquid themes built specifically for your brand identity. Zero reliance on bloated multipurpose themes, ensuring lightning-fast mobile rendering.

  • Native bundles & upsells
  • Full merchant section control

Shopify Plus & B2B

Tailored architectures for wholesale distributors and enterprise brands. Custom Checkout UI extensions, tiered pricing rules, and tax compliance.

  • Checkout Extensibility
  • B2B wholesale portals

Private Apps & ERP

Custom webhook middleware and microservices connecting Shopify with your Midwest ERP, warehouse management system, and shipping partners.

  • NetSuite & SAP sync
  • Custom warehouse automation

Headless Hydrogen

Next-generation headless commerce powered by Shopify Hydrogen and Oxygen. Sub-second page loads and complete creative freedom across digital touchpoints.

  • Storefront GraphQL API
  • Instant edge delivery
Local Market Footprint

Partnering with Brands Across Chicagoland & Midwest Logistics Corridors

Explore Chicago Main Hub →
Fulton Market DTC Brands & Tech
River North Apparel & Retail
Schaumburg Wholesale & B2B
Elk Grove Industrial & Logistics
Naperville Consumer Goods
Oak Brook Corporate HQ
Direct Answers

Frequently Asked Questions About Chicago Shopify Engineering

Every third-party Shopify app installed injects external JavaScript trackers, render-blocking stylesheets, and slow API calls into your checkout funnel, often dropping mobile conversion rates by 20-35%. ONS Tech builds features—such as bundle builders, custom sticky carts, countdown timers, and product swatches—natively in lightweight Liquid and vanilla JavaScript, eliminating recurring monthly app fees and boosting Core Web Vitals to 90+ on mobile.
Yes. We have executed multi-million dollar catalog migrations with zero downtime. We handle customer password hashing, full historical order data transfers, 301 SEO redirects mapping, multi-currency price lists, and custom ERP/NetSuite synchronization for Chicago and Midwest enterprises.
We optimize critical rendering paths by deferring non-essential analytics pixels, pre-loading hero product photography, purging dead app code snippets leftover in your theme, and restructuring collection filtering with instant client-side facets.
Yes. We engineer secure private Shopify apps hosted on AWS or Cloudflare Workers that listen to Shopify webhooks and synchronize bi-directional inventory, orders, tracking numbers, and returns with NetSuite, SAP, Brightpearl, ShipBob, or proprietary Midwest warehouse systems.
Yes. For hyper-growth direct-to-consumer (DTC) brands requiring sub-500ms page transitions and bespoke dynamic shopping experiences, we build headless architectures using Shopify Hydrogen and Oxygen (or Next.js) backed by Shopify Storefront GraphQL API.
We provide guaranteed synchronous overlap from 9:00 AM – 2:00 PM Central Time. You work directly with senior Shopify engineers via Slack and weekly video sprint reviews, ensuring fast feedback loops and rapid feature turnaround.
Accepting Chicago Shopify Sprints

Ready to Scale Your Chicago Shopify Store?

Speak directly with our senior Shopify engineers. We will analyze your store speed, app stack, and conversion funnel, providing an actionable roadmap within 24 hours.

Book a Chicago Strategy Call