UNILIT builds custom themes, Checkout UI Extensions, Shopify Functions, and Rebuy / Klaviyo integrations for DTC brands — and ships white-label work for agencies that need senior developers they can trust with their clients.
Productized services are fixed-price and fixed-scope — you know the cost before we start. Retainers give you a dedicated senior Shopify developer every month without the hiring overhead.
Speed, conversion, and security review of your storefront with a prioritized, actionable PDF report. The smartest €450 you'll spend on your store.
Tiered progress bars, custom icons, dynamic labels, upsell logic — a cart experience designed to raise AOV, built on Rebuy.
Popups and embedded forms styled to your brand with stable, update-proof selectors, wired correctly into your flows.
Disapproved products, duplicate IDs, Local Feed Partnership conflicts — diagnosed and fixed so your ads can actually run.
Custom fields, upsells, validation rules, and trust elements inside Shopify checkout — built natively with Checkout Extensibility.
High-converting custom Liquid themes built from your designs, plus migrations, Shopify Functions, and complex app integrations.
Your priority Shopify developer every month: theme work, bug fixes, integrations, and same-week turnaround. Cancel anytime.
Senior Shopify developers behind your brand. Agency-grade communication, clean handoffs, your client never knows we exist.
No juniors learning on your store. Every line is written by senior developers who build high-converting Shopify storefronts for US brands every single day.
No account managers, no office towers, no overhead baked into your invoice. The result: roughly half of what a typical US agency bills — for the same caliber of work.
Productized services have a price on the label, like a receipt. If something will cost more, you'll know before we start — never after.
From storefront to checkout to the apps and feeds around it — here's the surface area we cover for clients and agency partners.
Section-based, performance-tuned Liquid themes built for conversion — from new builds to surgical edits inside an existing theme without breaking what already works.
Custom fields, validation rules, shipping and discount logic, and post-purchase upsells — built natively with Shopify Functions and Checkout UI Extensions.
Rebuy, Klaviyo, and Gorgias configured and customized to your brand, plus custom apps with Shopify OAuth for reporting, inventory, and back-office workflows.
Diagnosing and fixing feed errors, duplicate IDs, and approval issues that quietly stop ads from running — so your marketing spend actually reaches the storefront.
Moving from Wix, Squarespace, WooCommerce, or an outdated theme to a modern Shopify setup — content, redirects, and metafields carried over cleanly.
Staff access, app permissions, checkout integrity, Core Web Vitals, and conversion friction — reviewed and prioritized into a single actionable report.
UNILIT is a development studio founded by senior Shopify engineers who spent years inside leading agencies building storefronts for fast-growing US brands — and now bring that same standard directly to clients and agency partners.
When you work with UNILIT, you talk to the people writing the code. No account managers, no telephone games, no handoffs where details die. Just senior engineering, clear communication, and work that ships.
Send a short note about your store or your agency's workload. You'll get a reply within one business day — usually with a concrete suggestion, not a sales pitch.