Shopify Development Company
Custom Themes, Apps, Functions, and Checkout Extensions That Grow Your Shopify Store
Custom Theme Development, Custom App Development, Shopify Functions, Public App Development, Theme Customization & Checkout Extensions - Shopify Expertise Built for Indian & Global D2C Brands
Many D2C and e-commerce brands outgrow generic Shopify themes, fixed checkout limitations, and third-party apps that restrict branding, flexibility, and long-term scalability. At Evolution Infosystem, we solve these challenges with custom Liquid themes, custom Shopify apps, Shopify Functions, Checkout UI Extensions, public Shopify App Store apps, and targeted theme customisation without requiring a full rebuild. As a Shopify Partner, we have delivered 300+ Shopify stores for fashion, beauty, wellness, food, electronics, and B2B commerce brands across the UK, the US, Australia, the UAE, and beyond.
Shopify Partner
Custom Themes + Apps + Functions
NDA Protected
Free Audit
300+
Shopify Stores
6
Shopify Specialisms
10+
Countries Served
Partner
Shopify Official
What Is Shopify Development & Why Does Choosing the Right Shopify Partner Matter?
Shopify is the world's leading commerce platform, powering over 2 million stores across 175 countries and processing more than $700 billion in cumulative GMV. It provides reliable hosting, PCI-compliant payments, a mature App Store, and a strong partner ecosystem for scalable e-commerce. However, Shopify's real value depends on implementation. Generic themes, slow page speeds, off-the-shelf apps that only partially meet business needs, and undifferentiated checkout experiences represent the platform's baseline, not its full potential.
Shopify development goes beyond themes and App Store apps to create fully customised, brand-specific commerce experiences. It includes custom Liquid or Hydrogen theme development, private Shopify apps for ERP, OMS, and 3PL integrations, Shopify Functions for extending discounts, shipping, payments, and cart validation, public Shopify App Store apps, theme customisation for new features and performance improvements, and Checkout UI Extensions for adding custom fields, workflows, and checkout logic on Shopify Plus.
At Evolution Infosystem, our Shopify practice spans all six development disciplines, from single-product D2C stores to multi-market Shopify Plus deployments with headless Hydrogen frontends. As a Shopify Partner with 300+ store builds, our team works with Liquid, React, Ruby, Node.js, Shopify CLI, the Admin, Storefront, and Partner APIs, plus Shopify Functions using Rust and AssemblyScript. Every project includes documented code, GitHub Actions and Shopify CLI deployment pipelines, and a structured handover that enables your team to manage content, products, and routine customisations independently.
| Shopify Limitations When Not Custom-Developed | What Custom Shopify Development Unlocks |
|---|---|
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Generic theme shared with thousands of other stores - no brand differentiationOur Shopify Development Services - Six Specialisms, One Expert Team
Each service below has a dedicated full-length page. This hub provides the overview; click through to the service page for technical depth, code examples, case studies, and FAQs specific to that service.
Custom Theme Development
Unique Liquid & Hydrogen themes built to your exact brand specification - zero shared theme code
- Shopify Liquid theme from scratch - OS 2.0 sections and blocks
- Shopify Hydrogen headless theme (React, Vite, Remix)
- Performance-first: Core Web Vitals LCP < 2.5s, TBT < 200ms
- Mobile-first responsive design to Figma/Adobe XD specification
- SEO architecture: structured data, canonical tags, sitemap
- Ongoing theme maintenance and feature extension
Custom App Development
Private Shopify apps integrating your store with any system and adding any functionality Shopify lacks natively
- Shopify Admin API (REST & GraphQL) integration
- Private apps for ERP, OMS, 3PL, CRM, and accounting integration
- Custom product configurators and interactive buying tools
- Subscription and recurring billing logic beyond Shopify native
- Wholesale / B2B pricing and order management apps
- Shopify CLI + GitHub Actions deployment pipeline
Extend Shopify Functions
Custom commerce logic at the Shopify platform level - discounts, shipping, payment, cart validation impossible in apps
- Custom discount functions: tiered, BOGO, bundle, loyalty
- Carrier-calculated shipping: live rates from 3PL or courier API
- Payment customisation: show/hide payment methods by customer tag
- Cart and checkout validation: enforce rules Shopify cannot natively
- Shopify Functions in Rust / AssemblyScript (Wasm runtime)
- Functions deployed via Shopify CLI - no server required
Shopify Public App Development
Partner-grade apps listed on the Shopify App Store - built to Shopify's review standards and monetisation model
- End-to-end public app development: concept to App Store listing
- Shopify Partner API, Billing API, Webhook API, OAuth 2.0
- App UI built in Shopify Polaris design system (React)
- App backend: Node.js / Ruby on Rails with PostgreSQL
- Shopify app review preparation and submission management
- App analytics, usage tracking, and customer support tooling
Shopify Theme Customization
Targeted customisation of existing purchased themes - adding features, fixing performance, extending sections
- Dawn, Impulse, Prestige, Turbo, Broadcast theme customization
- Custom section and block development for OS 2.0 themes
- Performance optimisation: lazy loading, image compression, script deferral
- Feature additions: custom mega-menu, product filters, quick-buy
- Liquid logic modifications: conditional content, metafield rendering
- Theme migration: upgrading from old themes to OS 2.0
Checkout Extensions & Customizations
Custom checkout UI and logic using Shopify Checkout UI Extensions and Shopify Plus checkout.liquid
- Checkout UI Extensions: custom banners, fields, components
- Post-purchase upsell extensions (checkout.liquid / post-purchase API)
- Delivery date picker in checkout (Checkout UI Extension)
- Custom gift message, loyalty points display, trust badges
- Shopify Plus checkout.liquid customization (Shopify Plus only)
- Checkout branding: fonts, colours, logo, button styles via Branding API
Is Your Shopify Store Growing as Fast as Your Brand - or Is It Holding You Back?
Tell us your current Shopify plan, your biggest store limitation, and what you've tried so far. We'll identify the specific Shopify development actions that will move the needle most - free, no commitment.
Shopify Development Services - In-Depth
The hub cards above give the overview. Below is the full technical description of each service for page depth, keyword coverage, and E-E-A-T signal.
Custom Theme Development
We build custom Shopify OS 2.0 themes with JSON templates, sections, and blocks, giving merchants full drag-and-drop control without touching code. Using Liquid and Hydrogen, we create high-performance, brand-specific storefronts from Figma or Adobe XD designs with responsive, cross-browser compatibility. Performance optimisation includes lazy loading, Shopify CDN, WebP, deferred scripts, critical CSS, and Core Web Vitals targets. We also implement semantic SEO, structured data, canonical tags, sitemaps, hreflang, and automated deployment through Shopify CLI and GitHub Actions.
Custom App Development
We develop custom private Shopify apps that integrate stores with ERP, OMS, 3PL, CRM, accounting systems, and other external platforms using the Shopify Admin API, with GraphQL as the preferred approach. Private apps are built exclusively for a single organisation and provide functionality beyond standard App Store solutions. We also build product configurators, subscription platforms, wholesale pricing, loyalty programs, and other custom business features. App backends are developed with Node.js or Ruby on Rails using PostgreSQL, deployed on AWS or Heroku, with Shopify webhooks processed through SQS for reliable, scalable integrations.
Extend Shopify Functions
Shopify Functions extend Shopify's core commerce logic by running directly within Shopify's infrastructure, eliminating checkout latency and external server dependencies. Built in Rust or AssemblyScript and deployed through Shopify CLI, they power high-performance discount, shipping, payment, cart validation, and fulfillment rules. Common use cases include tiered discounts, B2B pricing, custom shipping logic, payment restrictions, purchase validations, and fulfillment routing. Shopify Functions replace legacy Shopify Scripts and external discount apps with faster, more reliable server-side execution.
Shopify Public App Development
We develop public Shopify apps for the Shopify App Store using Shopify Polaris, App Bridge, Node.js or Ruby on Rails, PostgreSQL, and Redis. Every app includes OAuth 2.0 authentication, embedded app architecture, and integrations with the Admin API, Billing API, Webhook API, and Partner API. We ensure compliance with Shopify's API policies, GDPR webhook requirements, and app review standards, preparing detailed submission notes to maximise first-pass approval. Monetisation options include free trials, subscriptions, freemium plans, one-time purchases, and usage-based billing.
Shopify Theme Customization
Shopify theme customisation enhances existing free or premium themes without requiring a complete rebuild. We add custom OS 2.0 sections, extend Liquid logic, improve performance, and implement features such as mega menus, predictive search, product comparison, size guides, quick-buy drawers, infinite scroll, and recently viewed products. Performance optimisation targets Lighthouse and Core Web Vitals through image optimisation, deferred scripts, CSS improvements, and app consolidation. We also migrate legacy themes to Shopify OS 2.0 while preserving customisations, content, and merchant editing capabilities.
Checkout Extensions & Customizations
Shopify Checkout Extensions enable custom UI, business logic, and post-purchase experiences using the React-based Checkout UI Extensions API. We build custom banners, checkout fields, loyalty point displays, delivery date pickers, trust badges, and product upsells that integrate seamlessly into Shopify's native checkout. Post-purchase extensions support one-click upsells, surveys, loyalty enrolment, and subscription sign-ups. For Shopify Plus, checkout.liquid enables deeper checkout customisation, while the Checkout Branding API allows custom fonts, colours, buttons, and styling without code deployment.
Our Shopify Development Technology Stack
| CATEGORY | TECHNOLOGIES | USE CASE |
|---|---|---|
| Storefront (Theme) | Liquid, JSON templates, CSS, JS, OS 2.0 sections | Custom theme development and customization |
| Headless Storefront | Shopify Hydrogen, Remix, React, Vite, Tailwind CSS | High-performance headless Shopify frontend |
| Storefront API | GraphQL Storefront API (public / private app token) | Product, cart, checkout data for headless |
| Admin API | GraphQL Admin API, REST Admin API | Orders, products, customers, inventory, metafields |
| Shopify Functions | Rust, AssemblyScript, WebAssembly, Shopify CLI | Discounts, shipping, payment, cart validation |
| App Frontend | React, Shopify Polaris, App Bridge 3, TypeScript | Embedded app UI in Shopify Admin |
| App Backend | Node.js (Express/Fastify), Ruby on Rails, PostgreSQL | App logic, webhook processing, data storage |
| App Auth | Shopify OAuth 2.0, Session Token auth, OIDC | Secure merchant authentication in apps |
| Billing | Shopify Billing API (subscription/one-time/usage) | App monetisation charged via Shopify |
| Webhooks | HTTPS webhooks, SQS queue, GDPR compliance | Real-time event processing from Shopify |
| Checkout Extensions | Checkout UI Extensions API, React, Post-Purchase API | Custom checkout and post-purchase UI |
| Checkout Plus | checkout.liquid, Checkout Branding API (GraphQL) | Shopify Plus deep checkout customisation |
| Metafields | Metafield definitions, metaobjects, metafield API | Custom product/order data storage |
| Deployment | Shopify CLI, GitHub Actions, Theme Access API | Automated theme and app deployment |
| Testing | Jest, Vitest, Playwright, Shopify app testing library | Unit, integration, E2E for apps and themes |
| Performance | Lighthouse CI, WebPageTest, Chrome DevTools | Core Web Vitals monitoring and optimisation |
Our Shopify Development Process - 6 Phases
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Shopify vs WooCommerce vs Magento - Which Platform for D2C Brands in 2026?
| FACTOR |  |  |  |
|---|---|---|---|
| Hosting | Fully managed (Shopify Cloud) | Self-hosted (WP + PHP hosting) | Self-hosted or Adobe Commerce Cloud |
| Setup complexity | Low - store in days | Medium - WP + WooCommerce + plugins | High - developer-dependent setup |
| Custom development | Liquid + Hydrogen + Apps + Functions | PHP + WP hooks + custom plugins | PHP + XML + layout XML (complex) |
| App/plugin ecosystem | 10,000+ apps (Shopify App Store) | 50,000+ WP plugins (quality varies) | Marketplace (fewer, expensive) |
| Checkout customisation | Checkout UI Extensions + checkout.liquid (Plus) | Fully customisable (PHP hooks) | Fully customisable (complex) |
| Payment gateways India | Razorpay, PayU, CCAvenue, Cashfree native | All via plugin (quality varies) | All via module (complex install) |
| Shopify Payments India | Not available - use Razorpay/PayU | N/A | N/A |
| Multi-currency | Native (Markets) | Via plugin (WooCommerce Multi-Currency) | Native (but complex config) |
| Multi-language | Shopify Markets (native) | Via WPML or Polylang plugin | Native (but complex) |
| Headless option | Hydrogen + Storefront API | WooCommerce REST API + custom frontend | PWA Studio / custom frontend |
| Scalability India | Excellent - Shopify CDN handles Diwali spikes | Requires expensive hosting upgrades | Requires expensive infrastructure |
| SEO control | Good (with theme + app additions) | Excellent (Yoast + full HTML control) | Good (with developer setup) |
| Best for | D2C brands, fast launch, SME to enterprise | Bloggers monetising, WP-comfortable teams | Large catalogues, complex B2B, enterprise |
Shopify store not converting as expected?
We audit your theme performance, app stack, checkout flow, and conversion funnel. Average finding: 3-5 specific Shopify improvements that collectively impact conversion rate by 20-40%.
Want to see our Shopify work?
Browse 300+ Shopify builds - fashion, beauty, food, B2B wholesale, App Store apps - with real conversion results and technical breakdowns.
Shopify Development Use Cases by Industry
Fashion & Apparel D2C
Lookbook, size guide, wishlist, Try Before Buy
Fashion is Shopify's strongest vertical in India - brands like Snitch, Mulmul, and Rare Rabbit built on Shopify. Custom theme requirements: editorial lookbook sections (shoppable lifestyle photography with tagged products), custom size guide modal per product (metafield-driven, no third-party app), fit predictor (custom app collecting customer measurements and recommending size), wishlist functionality (custom app or Liquid session storage), and colour swatch rendering with sold-out state. Function requirements: volume discount for multi-buy (buy 3 get 20%), free gift with purchase (BOGO Function), and COD restriction on sale items. Checkout extension: free gift display in checkout, delivery date picker.
Beauty & Personal Care
Subscription, skin quiz, bundle builder, loyalty
Beauty D2C brands (skincare, haircare, wellness) require: custom skin/hair quiz routing customers to recommended products (custom app with quiz logic and Storefront API product recommendations), bundle builder (select 3 from 20 products at a bundle price - Shopify Function discount + custom cart UI), subscription (monthly auto-replenishment using Shopify Subscription API), loyalty points display and redemption in checkout (checkout extension), and personalised product routines (custom app storing customer quiz results and rendering personalised recommendations on repeat visits). Performance requirement: beauty brands have high mobile traffic - sub-2-second LCP on 4G is a conversion requirement.
Food & Grocery D2C
Pincode check, cold chain, subscription, expiry logic
Food D2C (health foods, organic, gourmet) on Shopify requires: pincode deliverability check (custom app checking product availability by pincode before add-to-cart), cold chain delivery date picker (checkout extension showing available delivery windows from logistics API), subscription for recurring orders (Shopify Subscription API - weekly/monthly dals, spices, snacks), GST invoice generation (custom app generating GST-compliant invoice PDF on order creation), and product freshness / expiry date metafield display. Shopify Function: restrict COD for perishable products, carrier-calculated shipping for cold chain from 3PL API.
Electronics & Gadgets
Comparison table, EMI display, warranty, B2B
Electronics D2C on Shopify: product comparison table (custom Liquid section comparing up to 3 products across technical specifications stored in metafields), EMI option display in PDP (custom app or metafield rendering EMI calculation for BNPL options), warranty registration (post-purchase checkout extension or custom app capturing serial number), B2B / reseller pricing (Shopify Function applying customer-tag-based pricing for dealer accounts), and bulk order form (custom app with a tabular order form for resellers to order multiple SKUs in quantities). Integration: SAP or Tally inventory sync via custom app Admin API integration.
B2B & Wholesale
Net terms, MOQ, tiered pricing, quote flow
B2B Shopify development (Shopify B2B on Plus or custom B2B logic on standard plans): customer-tag-based tiered pricing (Shopify Function), minimum order quantity enforcement (checkout validation Function blocking checkout if cart value below MOQ for the customer’s account type), net payment terms display (custom checkout extension showing ‘Net 30’ or ‘Net 60’ terms for approved B2B customers), quote request flow (custom app generating PDF quotes from cart contents and emailing to B2B buyer and sales rep), and company account management (Shopify B2B company structure on Plus, or custom app on standard plan). GST B2B invoice: GSTIN collection at checkout (checkout UI extension), GST-compliant invoice generation.
Shopify App Partners
Public App Store apps with Polaris UI and Billing API
Shopify Partners building public apps for the App Store: full-cycle public app development from concept to App Store approval - Polaris embedded app UI, Node.js/Rails backend, Shopify OAuth 2.0, Billing API (subscription / usage billing), GDPR webhooks (mandatory for App Store listing), Shopify app review preparation and submission management. Common app categories we build: review and UGC apps, loyalty and rewards apps, inventory and fulfillment apps, reporting and analytics apps, marketing automation apps, and B2B-specific apps. App growth: App Store listing optimisation, review generation strategy, and integration with Shopify's Built for Shopify programme for increased visibility.
Frequently Asked Questions - Shopify Development
Shopify custom theme development creates a unique storefront from scratch using Liquid and Online Store 2.0, rather than modifying a marketplace theme. It is the right choice when your brand needs a distinctive identity, complex merchandising, custom product layouts, advanced editorial content, or maximum performance with a clean Core Web Vitals-optimised codebase. It is also ideal for headless Shopify Hydrogen storefronts requiring React-based experiences beyond Liquid's capabilities. When an existing theme can meet your requirements through targeted enhancements, theme customisation is often the more cost-effective option. Evolution Infosystem recommends the most suitable approach during the discovery phase.
Shopify Functions allow developers to customise Shopify's core commerce logic by running code directly within Shopify's infrastructure during cart, checkout, and order processing. Unlike external Shopify apps, Functions execute with a 5-millisecond runtime budget, adding no checkout latency and no dependency on external servers. They support advanced discount logic, bundle pricing, B2B and loyalty-based pricing, real-time carrier shipping rules, payment method customisation, and cart or checkout validation such as quantity limits, age verification, restricted product combinations, and category-based minimum order values.
A Shopify private app, now called a custom app, is built exclusively for a single store and is installed directly through Shopify Admin without App Store review. It is ideal for ERP, OMS, 3PL, CRM integrations, and business-specific functionality. A Shopify public app is published on the Shopify App Store, requires a Shopify Partner account, OAuth 2.0 authentication, API policy compliance, GDPR webhooks, app review, and Billing API integration. Public apps are designed for products used by multiple merchants, while private apps focus on custom solutions for a single business. Evolution Infosystem develops both.
Yes, but with limitations. All Shopify plans support Checkout UI Extensions and the Checkout Branding API, allowing custom banners, fields, content blocks, loyalty displays, post-purchase experiences, and visual branding such as colours, fonts, buttons, and logos. However, deep structural checkout customisation, including checkout.liquid modifications, custom layouts, advanced form fields, and JavaScript-based checkout changes, requires Shopify Plus. While Shopify is gradually moving toward Checkout UI Extensions, checkout.liquid remains exclusive to Shopify Plus for advanced checkout customisation.
Shopify custom theme development depends on project complexity. A standard Liquid theme with a completed Figma design typically takes 4-8 weeks, while advanced Liquid themes with product configurators, subscription features, B2B pricing, or multilingual support require 8-12 weeks. A headless Shopify Hydrogen storefront with React components and Storefront API integration generally takes 10-16 weeks. These timelines assume approved designs, merchant-provided content, and review cycles completed within 48-72 hours. Additional time may be needed for design, ERP or 3PL integrations, or full platform migrations.
Shopify Hydrogen is Shopify's React framework for building headless storefronts that use the Storefront API and can be deployed on Shopify Oxygen or a custom CDN. It is ideal for complex product configurators, rich React-based experiences, real-time functionality, cross-channel commerce, and maximum Core Web Vitals performance. For most standard D2C stores, however, a well-optimised Liquid theme provides excellent performance with lower cost, faster delivery, and simpler maintenance. In practice, Liquid suits most Shopify stores, while Hydrogen is best reserved for projects with advanced performance or interactivity requirements.
Shopify integrates with ERP and OMS platforms through the Shopify Admin API using GraphQL and webhooks for real-time data exchange. Product and inventory information is synchronised from the ERP to Shopify, while customer orders created in Shopify are automatically sent to the ERP or OMS for processing. Fulfillment updates, tracking numbers, and carrier details are then synced back to Shopify to trigger customer notifications. Integrations can be built using custom Node.js middleware with reliable webhook processing or enterprise integration platforms. Evolution Infosystem develops custom integrations to support complex data mapping, business rules, and error handling that generic connector apps cannot reliably provide.
Yes. Evolution Infosystem provides three support models: retainer-based development for continuous feature enhancements, maintenance retainers for monitoring, bug fixes, platform updates, and security patches, and project-based engagements for occasional new features or integrations. We also monitor Shopify platform changes, including API updates, OS 2.0 enhancements, and checkout architecture changes, proactively notifying clients and implementing required updates before they become mandatory to keep stores secure, compatible, and performing reliably.
Custom Liquid and Hydrogen theme development, custom private app development, Shopify Functions (discounts, shipping, payment, validation), public Shopify App Store app development, theme customization, and Checkout UI Extensions and checkout.liquid customization (Shopify Plus).
Yes. Evolution Infosystem is an official Shopify Partner with 300+ Shopify store builds delivered.
Yes. Evolution Infosystem builds public Shopify apps listed on the Shopify App Store - including embedded React/Polaris UI, Shopify OAuth 2.0, Billing API, GDPR webhooks, and app review submission management.
Yes. Evolution Infosystem builds custom Shopify Admin API integrations with Tally, SAP, Oracle, Microsoft Dynamics, and other ERP and OMS systems for product sync, inventory sync, and order sync.
Yes. Evolution Infosystem develops Shopify Functions in Rust and AssemblyScript for custom discount logic, carrier-calculated shipping, payment method customisation, and cart/checkout validation.
Yes. Evolution Infosystem builds Shopify Hydrogen headless storefronts using React, Remix, and the Shopify Storefront API, deployed to Shopify Oxygen or custom CDN infrastructure.
Ready for Shopify Development That Actually Grows Your Store - Custom Themes, Apps, Functions, and Checkout Extensions Built Right?
300+ Shopify Stores. Shopify Partner. Custom Themes + Apps + Functions + Checkout Extensions. India & Global. Fashion, Beauty, Food, B2B, App Store Partners.