E-commerce Development · United States
Ecommerce Development Company USA
A remote team that builds online stores for US retailers, from checkout and tax calculation to the carrier integrations that shipping depends on.
NDA on request · Free, no-obligation estimate · Reply within one business day
US ecommerce involves a set of plumbing decisions that a generic store build tends to get wrong. These include how to calculate sales tax across states with very different rules, which carriers fulfillment relies on, and how much of the checkout must be rebuilt as opposed to configured on a platform such as Shopify or BigCommerce. An ecommerce development company working with US retailers needs an early answer on build versus platform before anything else is designed, because that choice shapes the budget more than any single feature.
Accessibility risk is higher for retail than almost any other US sector; a large share of ADA web accessibility demand letters target ecommerce checkout flows specifically, which makes WCAG 2.2 AA a launch requirement rather than a later cleanup item.
Market
What the USA buyers expect from this work
Sales tax calculation across states
US sales tax isn't a single rate; it varies by state, county and sometimes city, and a retailer can owe tax in a state purely from crossing an economic nexus threshold there. We integrate Stripe Tax or Avalara at checkout so the correct rate calculates automatically rather than relying on a flat estimate that's wrong for most orders.
Payment methods US shoppers expect
Apple Pay and Google Pay at checkout meaningfully reduce cart abandonment on mobile, and ACH is increasingly used for larger B2B orders. We build the payment flow around Stripe with these methods available by default rather than card-only checkout.
Carrier integration for US fulfillment
Shipping rate calculation, label generation and tracking updates typically run through UPS, USPS and FedEx APIs, sometimes through an aggregator like ShipStation or EasyPost when a retailer ships through more than one carrier depending on package weight and destination.
ADA accessibility risk at checkout specifically
Retail checkout flows are a frequent target of ADA demand letters, since an inaccessible checkout blocks a transaction entirely rather than just degrading the browsing experience. We build the cart and checkout to WCAG 2.2 AA as a launch requirement.
Fraud and chargeback handling
US card-not-present fraud rates push most retailers toward a processor-level fraud tool rather than manual review of every flagged order. We configure Stripe Radar or a comparable rules engine against the retailer's own risk tolerance, tuning it over the first few months of real orders rather than shipping default thresholds and leaving them untouched.
Compliance we plan for
- PCI DSS scope reduction through Stripe or a comparable tokenized processor
- Sales tax nexus and calculation via Stripe Tax or Avalara
- WCAG 2.2 AA for checkout and product pages
- CCPA/CPRA disclosures for customer data collected at checkout
How the engagement runs
Store builds are quoted as a fixed-scope project through launch, whether that's a Shopify Plus build with custom apps or a fully custom storefront on a headless commerce stack. Ongoing work (new features, seasonal campaigns, catalog changes) typically shifts to a retainer once the store is live and generating real order volume, billed in USD against a monthly sprint rather than a per-ticket rate.
IP assigns to the client on payment, and the store, theme code and any custom apps live under the client's own Shopify or hosting account rather than ours, so there's no dependency on us to keep the store running. A staged launch plan (soft launch to a small percentage of traffic, then a full cutover once orders, tax calculation and shipping labels have been checked against real transactions) is standard for any store replacing an existing one with live order volume.
Industries
Industries we often work with here
- Retail & E-commerceInventory, POS and storefront software that stays synchronized across every channel, with EDI connected for your wholesale partners.
- Food & BeverageRecipe costing, allergen labeling and lot traceability designed around the POS and kitchen systems your locations already use.
- Fitness & WellnessClass booking, membership billing and wearable data sync for studios and gyms that have grown past Mindbody or Glofox.
FAQ
Frequently asked questions
Do we need Avalara if we're already using Shopify's built-in tax?
Shopify's built-in tax handles basic rate lookups reasonably well for simple catalogs, but a retailer with product-specific tax rules, multi-state nexus, or marketplace facilitator complexity usually needs Stripe Tax or Avalara for accurate calculation and automated filing support.
Should we build on Shopify Plus or a fully custom storefront?
Shopify Plus covers most catalog and checkout needs faster and cheaper; a custom storefront makes sense when the business model doesn't fit Shopify's checkout constraints, subscription logic with complex proration, marketplace-style multi-vendor selling, or a highly custom product configurator, and the added engineering cost is worth the flexibility.
How do you reduce our PCI DSS scope?
Card data never touches our application servers; it goes directly from the customer's browser to Stripe (or a comparable processor) through a hosted field or tokenized element, which keeps most of the PCI DSS requirements out of scope for the store itself.
Can you integrate our store with UPS, USPS and FedEx?
Yes, either directly through each carrier's API or through an aggregator like ShipStation or EasyPost if you route packages across more than one carrier depending on weight, destination or delivery speed.
Why did we get an ADA demand letter about our checkout?
Checkout flows are a common target because an inaccessible one blocks a purchase outright rather than just making browsing harder. We rebuild the flagged flow to WCAG 2.2 AA (labeled fields, visible focus states, keyboard-only completion) and document the fix for your legal team's response.
Do you support Apple Pay and Google Pay at checkout?
Yes, by default on new builds. Both integrate through Stripe's payment element alongside card payments, and enabling them typically lifts mobile conversion since shoppers skip manual card entry entirely.
Explore
Keep exploring
- ServiceE-commerce Development
- MarketSoftware development in the USA
- United StatesAI Development Company USA
- United StatesCustom Software Development Company USA
- United StatesMobile App Development Company USA
- E-commerce DevelopmentE-commerce Development Company in Australia
- E-commerce DevelopmentE-commerce Development Company in Canada
- E-commerce DevelopmentE-commerce Development Company in Germany
Scope e-commerce development in the USA with a free estimate
Send a short description of the project. A senior engineer reads each request and answers with questions, next steps and an early budget range.