Practices/01 Websites & commerce

Sites and storesthat sell, on every screen.

Designed in the browser with real motion and 3D, built by our engineers, and tested on every phone and browser you support before a customer sees it. The store below is a sample build of ours, running live.

Book a call
Vellum, a complete sample store we designed, built, and tested. Click through it.

What we do.And how you will know it worked.

Every slow page and broken checkout is revenue walking out the door. We design, build, and test stores that sell.

  • Since 1994 · Dallas, Texas
  • Salesforce certified consulting partner
  • ASTQB-accredited training provider
  • ISTQB CT-AI accredited

01

Website redesign

Today

The site looks dated, loads slowly on phones, and your team avoids sending people to it.

With Rex Black Inc.

A redesigned site with real motion and interaction, tested on every phone and browser you support, and measured on speed and sales.

What you get

  • Design built in the browser, with motion and 3D where it helps the sale
  • Structure and content rebuilt around what buyers come to find
  • Speed and accessibility checked on real phones, not just a desktop
  • Analytics set up to measure leads and revenue from day one

How you know it is done

Speed, accessibility, and conversion measured before launch and again after it.

02

Ecommerce

Today

Checkout loses customers, the catalog is hard to search, and every promotion needs a developer.

With Rex Black Inc.

Shopify Plus, Salesforce Commerce Cloud, or a custom store, with checkout tested end to end and tools your team runs on its own.

What you get

  • Shopify Plus, Salesforce Commerce Cloud, or a custom build
  • Checkout, payments, tax, and promotions tested end to end
  • Catalog, search, and merchandising your team runs without a developer
  • Connected to order management, ERP, and CRM

How you know it is done

Every checkout path tested on every device and browser you support, before launch day.

03

Custom platforms

Today

A custom platform held together by workarounds, with releases that slip every quarter.

With Rex Black Inc.

A senior team that ships the first production release within weeks, then keeps shipping every week.

What you get

  • Senior engineers on the product from the first week
  • A working production release within weeks, then a release every week
  • Automated tests that run on every change
  • Documentation and a handover your own team can run with

How you know it is done

A release you can click through every week, held to acceptance criteria agreed up front.

Measured results

All case studies →

17%

US Revenue Growth

Retail / Ecommerce

Global Ecommerce Transformation

Five-country Salesforce Commerce Cloud rollout with 17% US revenue growth over a 3-year engagement.

Read the case study →

4 → 1

Systems Unified

Membership Platform

How it runs.Study, measure, build, own.

  1. 01

    Study

    Who buys, what they came for, where they drop off, and which systems the site has to talk to.

  2. 02

    Measure

    Speed, conversion, and search baselines, so every design decision has a number behind it.

  3. 03

    Build

    Designed and built in the browser in short steps you click through every week.

  4. 04

    Own

    Tested on every device before launch, measured after it, and supported once it is live.

Questionswe hear first.

Which platforms do you build on?

Shopify Plus, Salesforce Commerce Cloud, and custom builds on Next.js. We recommend the platform after we understand your catalog, your team, and the systems the store has to connect to.

Do you handle design and engineering, or just one?

Both. Design happens in the browser with the engineers who build it, so what you approve is what ships.

Can you work with our in-house team?

Yes. We can own the whole build, or work inside your team on the parts where you need senior help, and hand over everything at the end.

How do you test before launch?

Every page and checkout path on the phones and browsers your customers use, plus speed, accessibility, and search checks. Testing is our original discipline, and it is part of every build.

Free to read

Open the library →

Evaluating us? Start here · 6 reads

Hiring a team for your site or store, what to read before the first call.

Four short stops for anyone choosing a partner to rebuild a website or store: what is changing in commerce, how we plan a build and a migration, what the result looked like for a client, and the questions to ask any agency before you sign.

Start the path →

Learning path · 10 reads

Building for the web, from how a page loads to replatforming a store.

Four levels, read in order: how the web works and what makes a site good, how to test performance and mobile experiences, how teams decide what to build and migrate platforms safely, and where commerce is heading.

Start the path →

Guide

Seven questions to ask before you sign

Seven questions that show whether a delivery partner is set up to protect your launch. Ask every vendor, including us. Written for buyers who need to defend the choice to a CEO or a board.

Buyer guide →

Primer

How Websites Work: What Happens When You Type an Address

A plain-English tour of what happens between typing a web address and seeing a page: domain names, servers, HTTPS, HTML, CSS, and JavaScript, the front end and back end, databases, and content delivery networks.

Article →

Interactive demo

Compare AI Models

Run the same prompt against up to 3 of 13 current models (Anthropic, plus open-weight models from OpenAI, Meta, DeepSeek, Mistral, Alibaba, MiniMax, and Z AI hosted in US data centers) side by side. See real cost, real latency, and real output quality, in real time. Built so you can stop guessing which model fits which job.

Interactive demo →

Primer

Testing a Website: A Beginner's Checklist

A practical checklist for testing a website before it launches: links and navigation, forms, browsers and devices, accessibility, speed, content, search basics, and security basics, with the free tools that make each check fast.

Article →

Interactive demo

What is an AI Agent? The 6 Layers

Plain-English walkthrough of the six layers behind every production agent: the brain (LLM), the hands (tools), memory, guardrails, observability, and orchestration. Click through each layer to see what it does, what breaks without it, and which vendors cover which piece.

Interactive demo →

Primer

What Makes a Good Website: Speed, Accessibility, Search, and Trust

The qualities that separate a good website from a merely attractive one: page speed and Core Web Vitals, accessibility for people with disabilities, being found in search and AI answers, mobile design, security, and clear content.

Article →

What is a slow page or a broken checkout costing you this month?Let's put a number on it.

Book a call