Zepto Sign Customizer.

Context

Zepto Sign Customizer is a commercial Shopify app built for merchants selling bespoke neon signage. The hard problem isn’t checkout — it’s giving the shopper a design surface that’s powerful enough to express what they want, simple enough to not overwhelm them, and accurate enough that what they see is what the shop will actually produce.

What I built

• A real-time design canvas with per-character, per-word, and per-line controls for colour and font. The data model had to stay addressable at the character level without leaking that complexity into the UI.
• A state architecture in Redux that kept the canvas, the tool panel, and the preview in lockstep — every keystroke triggers updates in three places and they all have to agree.
• A responsive UI layer using Remix and Shopify Polaris so the app feels native inside the Shopify admin, and the shopper-facing customizer works cleanly on mobile.
• A merchant admin dashboard with order tracking, customization previews, and monitoring views.
• Cross-stack fixes in Laravel and MySQL — the team is small enough that “it’s a frontend bug” often turns into “it’s actually a validation issue on the server”.

What I learned

Building product inside another platform (Shopify) forces you to think about constraints you’d otherwise ignore — the Polaris design system, the App Bridge contract, the merchant’s existing mental model. The UI that wins isn’t the one with the most polish, it’s the one that fits.