Shopify · Liquid · Hydrogen

Shopify Technical Services

Senior Shopify development for merchants who need a store that's fast, customized, and built to scale — from Liquid theme work to full headless Hydrogen builds and Shopify Plus migrations.

Built for merchants, not template buyers

Most Shopify stores hit a ceiling — the theme can't do what the brand needs, page speed tanks after the fifth app, or a Plus migration requires custom checkout logic. We're the team you bring in when off-the-shelf stops working.

Every engagement is led by a senior Shopify engineer. No outsourcing, no hand-off to a junior, no "we'll learn it on your project." We've shipped on Online Store 2.0, Hydrogen, the Checkout Extensibility platform, and against the GraphQL Admin API — and we know where each one breaks.

What's included

Theme engineering

Custom Liquid sections, blocks, and Section Groups — built against Online Store 2.0 standards.

Headless & Hydrogen

React-based storefronts on Hydrogen / Remix with Oxygen deployment and Storefront API.

Checkout extensibility

Checkout UI Extensions, Functions for discounts/shipping/payments, branded one-page checkout.

Performance & CWV

Core Web Vitals tuning — LCP, CLS, INP — to take Lighthouse from 50s into the 90s.

App integration

Third-party app integration, private/custom apps, webhooks, and Admin API automation.

Shopify Plus migration

Replatforming from BigCommerce, WooCommerce, or Magento to Shopify / Plus with zero SEO loss.

Typical deliverables

Production-ready theme code in a Git repository (GitHub / Shopify CLI workflow)
Documentation for every custom section, block, and metafield
Before/after Lighthouse and Core Web Vitals reports
QA across major browsers and devices (BrowserStack)
30-day post-launch warranty on shipped work
Knowledge transfer session with your internal team

How we engage

Engagements start with a paid, fixed-price discovery sprint (1–2 weeks) where we audit your store, document scope, and produce a written technical proposal. From there, work is delivered in 2-week sprints against a shared backlog — you see exactly what's being built, when, and at what cost.

FAQ

Do you work directly in our Shopify store or in a staging environment?

Both. We develop in a separate theme or development store using Shopify CLI, code-review every change, and only publish to your live theme after sign-off. For Plus, we use development stores tied to your organization.

Can you work with our existing theme, or do we need a rebuild?

Whenever the existing theme is on Online Store 2.0 and reasonably well-structured, we extend it rather than rebuild. We'll tell you honestly in the discovery sprint if a rebuild would actually save you money over the next 12 months.

How do you handle Core Web Vitals on stores with lots of apps?

Audit first: we measure real user data via CrUX and synthetic data via Lighthouse, identify which apps inject the most JS/CSS, and either defer them, swap them, or replace with native theme code. Most stores recover 20–40 points without removing functionality.

Do you also do design?

We are an engineering team. We work well with your designer or design agency, and we can recommend partners we trust if you don't have one. We do handle UX/UI polish and component-level design as part of theme engineering.

Ready to ship a better store?

One email gets you a discovery call and a clear scope — no agency theatrics.

business@feerr.com