Build, customize, and scale your Shopify store.
CartSetu partners with Shopify merchants and agencies to build custom storefronts, Shopify apps, and scalable ecommerce solutions.
From custom themes and advanced discount functionality to integrations and store optimization, we deliver solutions tailored to your business needs.
Our focus is simple: build reliable, maintainable systems that solve real problems today and support your growth tomorrow.
Build
Custom themes, apps, and integrations tailored to your business.
Optimize
Improve workflows, customer experience, and store performance.
Scale
Long-term development support as your business grows.
Powerful discounts made simple.InfoFeatured app
CS Advanced Discounts helps merchants create advanced promotions, quantity discounts, and custom pricing rules.
Services
From custom storefronts to ongoing support, we cover the full Shopify stack.
Custom Shopify themes
Theme development focused on speed, maintainability, and clean merchant workflows.
Shopify app development
Custom public and embedded app work with a focus on stable admin workflows and merchant support.
Custom development
Project-specific build work for Shopify-adjacent tooling, admin utilities, and storefront operations.
Store optimization
Performance, conversion, and operational improvement work with measurable implementation outputs.
Migration services
Platform and theme migrations handled with an emphasis on content continuity and stable rollout steps.
Ongoing support
Long-term support for Shopify apps, theme changes, and platform updates.
Ready to start your Shopify project?
Whether you're launching a new store, building a custom app, or improving an existing setup, we're here to help.