Commerce platforms for consumer brands, built by a senior architect.
JR Quantum Solutions is the practice of Junior Warner. I spent 15+ years inside ecommerce teams at apparel and lifestyle brands before going independent, which means I have lived with the platforms I build, long after launch day. You work directly with the architect, not an account team.
Selected work
Recognizable consumer brands, real launches. Roles described as they were.
Killer Brownie®
Launched the direct-to-consumer storefront for a brand within Irresistible Foods Group, the family company behind King's Hawaiian and Grillo's Pickles. Led the engagement and the platform work, with a senior developer on build support.
Kaʻū Coffee Mill
Took over a stalled re-platform, coordinated the developer and stakeholders, and drove it to launch on the agreed timeline and budget.
Confidential DTC build
A confidential direct-to-consumer storefront for a baked goods brand, in active development. Hands-on architecture and build. Case study to follow at launch.
What I do
Senior work, end to end. You talk to the person doing it.Platform architecture
Structure a Shopify build to scale, with a clean path off the legacy patterns holding a store back.
Migrations & re-platforms
Move onto Shopify or Shopify Plus from WooCommerce, Magento, or a custom stack without losing a weekend of sales.
Performance & conversion
Find what slows a storefront down and fix it: Core Web Vitals, render paths, and the decisions that cost conversions.
Systems & integration
Connect commerce to POS, ERP, payments, and fulfillment so inventory, orders, and product data agree everywhere they appear.
Disciplined delivery
Reviewable increments, automated checks, and a git-committed audit trail, so complex work moves fast without losing rigor. I use AI tooling where it speeds delivery, never where it replaces review.
Handoff & training
If your team will own the platform, I train them to run and extend it, with documentation and walkthroughs.
How I architect
The part most agencies hide: how the whole platform fits together, not just the storefront on top.Shopify sits at the center when it is the right core. When a business case calls for more, I go headless or bring best-in-class systems in around it. The goal is the same either way: a platform that scales and stays maintainable.
Scope
Map the platform, the goals, and the real constraints, and agree on what success looks like before any code is written.
Architect
Design the approach and stress-test it before anything gets built, surfacing risk while it is still cheap to change.
Build & QA
Ship in reviewable increments with automated checks, so quality is verified continuously rather than at the end.
Handoff & training
If your team will own it, I train them to run and extend the platform, with documentation and walkthroughs.
About
JR Quantum Solutions is the independent practice of Junior Warner. Over 15+ years I have worked in ecommerce and digital platform roles in-house at apparel and lifestyle brands including Outerknown, Cabi, and Equinox. For the last 8+ years I have built on Shopify, independently, for consumer brands like Killer Brownie and Kaʻū Coffee Mill.
You work directly with me. For larger builds, I bring in a vetted bench of senior specialists, assembled to fit the work, so you get senior hands without agency overhead.
The work tends to land in the same place: take something complex and make it dependable. Fewer surprises, faster launches, and a platform a team can actually maintain.
What clients say
Real recommendations from clients I have worked with directly.He successfully delivered the migration within the agreed timeline and budget.
I have had the pleasure of working with Junior Warner on a complex WooCommerce to Shopify migration project. He stepped into a challenging migration that had been impacted by delays, technical issues, and ineffective communication. He quickly established himself as the central point of coordination between the back-end developer, internal stakeholders, and the client, ensuring everyone remained informed and aligned. By asking the right questions, resolving issues efficiently, and keeping the project on track, he successfully delivered the migration within the agreed timeline and budget.
Junior is professional, accountable, reliable, and consistently courteous in all of his interactions. His deep understanding of Shopify, WooCommerce, Magento, and custom website platforms allows him to ask the right questions early, preventing unnecessary scope changes and costly launch delays. He combines strong technical knowledge with excellent communication skills, making complex projects far easier to manage. Above all, Junior is an absolute pleasure to work with, and I would not hesitate to recommend him to any organization looking for a dependable and highly capable website development professional.
Junior doesn't just build websites. He takes the time to understand our business objectives.
We've had the pleasure of working with Junior Warner for the past three years across multiple website projects, and he has become an invaluable extension of our team. When we first started working together, Junior was helping us maintain one of our existing brands. Since then, he has been instrumental in the complete redesign of another brand and is now partnering with us on a brand-new website project.
Throughout every engagement, Junior has consistently demonstrated exceptional technical expertise, professionalism, and reliability. He is our go to expert for all things Shopify, whether it's custom development, ongoing maintenance, troubleshooting, performance optimization, or implementing new functionality. We know we can count on him to deliver thoughtful solutions and high-quality work every time.
What we appreciate most is that Junior doesn't just build websites. He takes the time to understand our business objectives and provides recommendations that improve both the user experience and the overall performance of our sites. He's proactive, responsive, and a true partner who genuinely cares about the success of every project.
We wholeheartedly recommend Junior Warner to anyone looking for a talented, dependable, and highly skilled Shopify developer. His expertise, collaborative approach, and commitment to excellence have made him an integral part of our web development efforts, and we look forward to continuing to work with him on many more projects in the future.
Start with a free audit.
Send me your store and what is in your way. I will record a 15 minute audit of where it stands and what I would do first, no strings.