Five Acre Code · Shopify engineering & software
Expert Shopify engineering for merchants who have outgrown native settings.
Custom apps, checkout systems, integrations, and operational tooling, built by an engineer who ships, scoped tightly, and written to be maintained. No agency overhead. No retainer that outlasts the work.
Services
Engineering for the parts of Shopify that carry real operational weight.
Scoped work on the systems that move money and break under volume: checkout logic, custom apps, integrations, migrations, and the workflows your team runs every day.
01
Custom Shopify development
Private apps, admin extensions, and data flows built around how your team actually operates, not around a template's assumptions.
02
Checkout systems
Shopify Functions for discounts, delivery, payment, and validation, plus a clean migration path off Scripts now that they've gone dark.
03
Integrations & retainers
App-stack consolidation, workflow automation, and steady engineering capacity for merchants who need direct technical ownership, not a ticket queue.
Flagship app
Cart Marshal.
One Shopify app for every checkout rule across discounts, delivery, payment, and validation. The workflow moves from draft to publish so nothing goes live to customers unreviewed.
One rule workflow
Draft, preview, publish, and audit every checkout rule from a purpose-built interface instead of spreading logic across four apps and the admin.
View Cart MarshalImplementation help
We configure your initial rule library, migrate legacy Scripts logic where it makes sense, and document how your team maintains it after.
See implementation servicesWhy Five Acre Code
Direct engineering execution, not a project that grows to fill a budget.
Scopes stay concrete, decisions are written down, and everything is built to be handed back to your team. The deliverable is working software your store can rely on, not a dependency on us.
Trust & support
Clear policies, technical documentation, one support channel.
Everything you need to evaluate Five Acre Code and Cart Marshal before you commit a single dollar or a single line of store data.
Contact
Have a Shopify problem worth solving carefully?
Tell us what needs to be built, integrated, migrated, or cleaned up. You'll get questions, a suggested path, or an honest no if it isn't a fit.
Start a conversation