Custom Shopify Apps
Plus Engineering
Custom Shopify apps
for workflows off-the-shelf
tools cannot handle.
We design and build custom Shopify apps, backend systems, app proxy experiences, admin tools, and integrations for brands that need more control than standard apps provide.
Where we work
Custom Shopify apps, checkout logic, app proxy workflows, integrations, and operational systems for Shopify and Shopify Plus brands.
When custom is right
When your team is forcing a workflow into apps that do not fit, or when multiple apps are doing one business-critical job badly.
What We Build
Custom Shopify apps
Built around your specific commerce model, not generic SaaS configurations.
Embedded admin apps
Polaris-based admin tools that live inside Shopify and feel native to operators.
App proxy experiences
Customer-facing flows served through your storefront with backend logic you control.
Product configurators
Multi-step configurators, bundle builders, and made-to-order workflows.
Booking systems
Class, session, appointment, and waitlist logic integrated with Shopify orders.
Waiver signing systems
Customer waiver capture tied to booking and order workflows.
Inventory sync tools
Real-time and batch sync between Shopify and external inventory or ERP systems.
ERP / CRM integrations
Order, customer, and product sync to NetSuite, Salesforce, HubSpot, and custom systems.
Klaviyo integrations
Custom events, segment logic, and operational data piped into lifecycle flows.
Internal dashboards
Operator-facing tools for inventory, orders, fulfilment, and customer data.
B2B ordering systems
Wholesale catalog, account-specific pricing, quote and reorder workflows.
Bulk product / variant tools
Operator tooling that replaces hours of manual catalog work with a single screen.
When Custom Makes Sense
Signals you have outgrown app installs.
Not every workflow needs a custom app. But when the signals below show up, a focused custom build usually pays back in operational time and fewer app subscription line items.
Request a Shopify
App Consultation.
Tell us about the workflow you are trying to solve. We will review the fit and recommend the right build approach.