Sunday Digital
SundayShopify Development
eCommerce · Shopify & Shopify Plus

Built on Shopify.Engineered to scale.

One boutique team, every layer of Shopify. From storefront craft to checkout engineering, we partner with brands ready to move beyond templates and app bloat.

See capabilities
01 · Wireframe
/products/object-no-01 — wireframe
ADD TO BAGCTA · primary
v1.0 wireframe
01 · Wireframe
02 · Code
03 · Render
04 · Convert
In-house team250+ stores shippedShopify Plus partner10+ yearsBrooklyn · Remote
What you get

Partner with us — and feel the difference.

Four commitments that shape every engagement — from a quick fix to a multi-quarter Shopify Plus build.

01

Free strategic audit

Every engagement starts with a no-cost growth audit — what's working, what's leaking conversion, and what to fix first.

02

Direct senior contact

No account managers, no offshore handoffs. You work with the senior who scopes, designs, and writes the code.

03

On-schedule delivery

Timelines we commit to are timelines we hit. Fewer projects in flight, more attention on yours.

04

Custom-coded, no app bloat

One-time investments instead of monthly app subscriptions. Better performance, full ownership, lower lifetime cost.

Our capabilities

Every layer of Shopify, handled.

Nine practices, one boutique team. Senior generalists who own a discipline end-to-end — strategy, design, engineering, launch.

Custom Shopify themes that look great, perform fast, and convert better. Responsive, brand-focused storefronts with motion, animation, and interactive detail where it matters.

Bespoke, responsive Shopify themes that combine smart design with advanced functionality. Built lean, easy to maintain, and ready to scale alongside the brand.

From full setup and configuration to advanced functionality and performance optimization — we handle every detail of a launch ready to scale.

Initial installation, fine-tuning of layouts, styling, and features that reflect your brand — plus ongoing updates to keep the store fast, reliable, and visually consistent.

Deep audits that uncover performance gaps, refine design and functionality, and ensure your store runs fast, secure, and ready to convert.

When Shopify's defaults aren't enough, we build custom solutions — from design enhancements to advanced integrations. One-time investments, not monthly app fees.

Once you're live, we stay close. Flexible monthly plans for fast updates, performance work, and ongoing optimization, plus tutorials so your team owns it.

Full migration from any platform — preserving your data, minimizing downtime, and configuring the new store for performance and growth from day one.

Custom Shopify apps that automate workflows and elevate UX. Plus white-label development for agencies — our experts working invisibly under your brand.

Behind the build

We write code. Lots of it.

Custom Liquid, React, Hydrogen, GraphQL — written by senior engineers, reviewed on every PR. No template recycling. No app stitching.

100%Custom-coded0TemplatesPRReviewed every push
Custom development · 250+ possibilities

If you can imagine it — we can build it.

From storefront to checkout, we build custom functionality across every layer of Shopify and Shopify Plus — with one-time coded solutions, not recurring app costs.

01 / 06Product Experience & Merchandising

Make every product feel handpicked.

  • Product bundle kits
  • Custom product configurators
  • Tiered pricing rules
  • Mix & match bundles
  • Advanced variant selectors
  • Gift-with-purchase triggers
  • Custom color swatches
  • Dynamic size guides & fit charts
08features in this stack
Product · Live previewClay
02 / 06Checkout & Cart

Recover revenue at the last mile.

  • Upsell & cross-sell at checkout
  • Cart goal progress bars
  • Custom discount logic
  • Dynamic shipping thresholds
  • Post-purchase upsell experiences
05features in this stack
Cart$36
Spend $39 more for free shipping
03 / 06Inventory & Operations

Operate at scale without chaos.

  • Multi-warehouse product visibility
  • Custom backorder messaging
  • Advanced pre-order systems
  • Real-time stock automation
  • Gift wrapping & personalization logic
05features in this stack
Live stock · Multi-warehouse
Brooklyn
8 in stock
Los Angeles
1 in stock
London
16 in stock
04 / 06User Engagement & Loyalty

Turn first-time buyers into regulars.

  • Dynamic rewards integration
  • Custom referral flows
  • Interactive wishlists
  • Advanced review display systems
  • Dynamic announcement bars
05features in this stack
Member rewards
0points
Gold tier unlocked at 1,000 — free shipping for life.
05 / 06Marketing & Conversion

Ship campaigns without dev tickets.

  • Custom landing page builders
  • Campaign-specific checkout flows
  • Discount code restrictions
  • Tracking & analytics integrations
  • Smart banners & personalized content
05features in this stack
Limited drop
Spring Edit · 25% off ends in
04HRS
32MIN
13SEC
Auto-targeted to first-time visitors
06 / 06UI/UX Enhancements

Storefront craft, in motion.

  • Dynamic homepage & PDP sections
  • Sticky ATC bars & floating elements
  • Video-based product galleries
  • Micro-interactions & animations
  • Custom quick-view modules
05features in this stack
Linen Field Jacket
Bone · M
Sticky ATC · always reachable
How we work

Seven steps, no surprises.

Transparent and systematic — you always see where we are, what's next, and what we're deciding right now.

  • Discovery.

    We start with your business — goals, constraints, and the metric that matters most. Nothing else gets built until that's clear.

  • Strategy.

    A clear technical specification: scope, stack, milestones, and the decisions we're making before a single pixel moves.

  • Design.

    UI/UX that feels like your brand, not a Shopify template. Mobile-first, motion where it earns attention.

  • Build.

    Senior engineers writing custom Liquid, React, and Hydrogen — not assembling apps. Code reviews on every PR.

  • QA.

    Cross-browser, cross-device, real-data testing. Performance budgets enforced before launch, not after.

  • Launch.

    Coordinated cutover with zero data loss. We sit with your team on launch day until everything is stable.

  • Support.

    Flexible monthly retainers for ongoing optimization, A/B testing, and the next thing on your roadmap.

Stack & integrations

The tools we use, daily.

Shopify PlusLiquidHydrogenStorefront APIReactGraphQLTypeScriptTailwindKlaviyoAlgoliaStripeRechargeLoop ReturnsGorgiasYotpoContentfulShopify PlusLiquidHydrogenStorefront APIReactGraphQLTypeScriptTailwindKlaviyoAlgoliaStripeRechargeLoop ReturnsGorgiasYotpoContentful
Who we partner with

Founders ready to scale. eCommerce teams growing fast. Brands elevating Shopify.

We build and optimize — not validate. We collaborate with teams that have a clear vision and are ready to move efficiently toward growth with tailored, results-driven solutions.

Still taking new projects03 · 26
Great brands
aren't built
overnight.
Sunday DigitalEst. 2018A 360° digital studio
StrategyDesignCodeGrowthBrandCommerceStrategyDesignCodeGrowthBrandCommerce
Tell us about your projectWrite usinfo@sundaydigital.io
Brooklyn, NYStart a projectRemote@sundaydigital

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