Should I use Shopify or build custom?

Shopify is great for simple stores. Build custom when you need unique UX, lower per-transaction fees at scale, or integrations Shopify does not support natively.

How do I handle sales tax?

Use an automated tax service like TaxJar or Stripe Tax. They calculate rates by jurisdiction and handle filing. Manual tax tables become unmanageable fast.

How important is page speed for e-commerce?

Critical. A 1-second delay in load time reduces conversions by 7%. Use static generation, image optimization, and CDN caching for every product page.

How to Build an E-Commerce Store That Converts

From product pages to checkout optimization, learn the technical and UX decisions that separate high-converting stores from the rest.

Project type: E-Commerce Store

A custom e-commerce store gives you full control over branding, UX, and margins. This guide covers product catalog design, cart and checkout flows, payment integration, and the post-purchase experience.

Prerequisites

Product catalog with pricing, images, and descriptions ready
Payment processor account (Stripe or PayPal) set up
Shipping strategy and fulfillment workflow defined

Steps

Build a High-Performance Product Catalog: Create filterable, searchable product listings with variant support, rich images, and SEO-friendly URLs that rank in Google Shopping.
- Headless CMS for product data vs. database-driven catalog
- Static generation for product pages vs. server-side rendering
Design Cart and Checkout Flow: Build a persistent cart with guest checkout, saved addresses, discount code support, and shipping calculation. Minimize steps to reduce abandonment.
- Single-page checkout vs. multi-step checkout
- Guest checkout vs. account required
Integrate Payment and Tax Processing: Connect Stripe or PayPal for card payments, digital wallets, and buy-now-pay-later options. Automate sales tax calculation with services like TaxJar.
- Stripe Checkout (hosted) vs. custom payment form (Elements)
- Manual tax rules vs. automated tax calculation service
Build Order Management and Notifications: Implement order status tracking, automated email notifications for confirmation and shipping, and an admin panel for fulfillment.
- Custom admin panel vs. integration with Shopify/ShipStation for fulfillment
- Transactional email via SendGrid vs. AWS SES

Estimated Scope

Hours: 150 - 280 | Cost: $300 - $560 | Timeline: 5 - 9 weeks

Common Mistakes

Over-engineering the product catalog: Start with a flat product model; add variants and options only as your catalog demands it
Neglecting mobile checkout UX: 70% of e-commerce traffic is mobile; test checkout flow on real devices before launch
Forgetting about inventory sync: Real-time inventory updates prevent overselling; use webhooks to keep stock levels accurate

Frequently Asked Questions

Should I use Shopify or build custom?: Shopify is great for simple stores. Build custom when you need unique UX, lower per-transaction fees at scale, or integrations Shopify does not support natively.
How do I handle sales tax?: Use an automated tax service like TaxJar or Stripe Tax. They calculate rates by jurisdiction and handle filing. Manual tax tables become unmanageable fast.
How important is page speed for e-commerce?: Critical. A 1-second delay in load time reduces conversions by 7%. Use static generation, image optimization, and CDN caching for every product page.