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About me

Photo of Saddam Husain

Saddam Husain

Shopify App and Theme Developer Chandigarh, India

I have built Shopify stores, apps and headless storefronts since 2019. My clients include brands in the UK, Australia and New Zealand.

Today I build Shopify apps and themes at Cronix, a full-service eCommerce agency. I also teach students who want to do the same work.

My courses and live classes teach the same work I do every day, explained in simple steps. You learn what clients really pay for.

LinkedIn profile Client work My apps

See my full Shopify developer map
years building on Shopify
7+
Shopify stores built
200+
Shopify apps built
30+
Shopify companies
4

Experience

4 companies · since 2019

  1. Shopify App and Theme DeveloperCurrent

    Cronix (opens in a new tab)

    Apr 2026 – Present7 mos

    • Builds Shopify apps for the agency's clients.
    • Builds and customizes Shopify themes, from single sections to full stores.
    • Works at a full-service eCommerce agency with 100+ clients worldwide.
    • Shopify apps
    • Admin API
    • Liquid
    • Online Store 2.0
    • Theme development

  2. Senior Shopify Developer

    Base2Brand Infotech Pvt. Ltd.

    Nov 2023 – Mar 20262 yrs 5 mos

    • Led theme, app and Hydrogen headless projects.
    • Built bundles, upsells, cross-sells and advanced cart and checkout flows.
    • Connected payment, ERP, Contentful and Braze APIs to Shopify.
    • Hydrogen
    • Shopify Plus
    • Liquid
    • Contentful
    • Braze

  3. Senior Shopify App Developer

    Edoro Technologies LLP

    Nov 2022 – Oct 20231 yr

    • Built custom apps for dropshipping, product sync and subscriptions.
    • Set up multi-store, multi-currency and Shopify Plus stores.
    • Worked daily with the Admin API, Storefront API, Node.js and Liquid.
    • Admin API
    • Storefront API
    • Node.js
    • Subscriptions

  4. Shopify Developer

    TRooInbound Pvt. Ltd.

    Aug 2019 – Nov 20223 yrs 4 mos

    • Built complete stores, from the theme to app integrations.
    • Made fast, mobile-friendly themes tuned for speed and SEO.
    • Added quick buy, slide-out carts, product options and more.
    • Liquid
    • JavaScript
    • Theme development
    • Speed and SEO

I work across the whole Shopify ecosystem

  • Custom themesLiquid, Online Store 2.0, sections, blocks, metafields and metaobjects.
  • Public appsApps built for the Shopify App Store, from idea to review.
  • Custom appsPrivate apps for one brand: product sync, dashboards, subscriptions.
  • Headless storesHydrogen, React and Next.js on the Storefront API.
  • Cart and checkoutCustom checkout flows, bundles, gift messages, in-store pickup.
  • APIs and integrationsGraphQL, REST, ERP, Contentful, Braze and payment gateways.
  • MarketsMulti-currency and multi-language stores in EN, FR, IT, DE and ES.
  • Shopify PlusPlus stores, multi-store setups and advanced checkout work.

The full Shopify developer map

Every part of Shopify, in one place

The 15 areas of the Shopify platform I know and use, from themes and apps to Functions, checkout and POS.

  • 15 areas
  • 72 skills
  • 15 official docs

  1. Online Store and themes

    • Online Store 2.0
    • JSON templates
    • Sections and blocks
    • Liquid
    • Metafields and dynamic sources
    • Theme previews with Shopify CLI
    Docs for Online Store and themes on shopify.dev (opens in a new tab)

  2. Storefront and headless

    • Storefront API (GraphQL)
    • Hydrogen
    • Oxygen hosting
    • Next.js storefronts
    • Shop Minis
    Docs for Storefront and headless on shopify.dev (opens in a new tab)

  3. Admin and data APIs

    • Admin GraphQL API
    • REST Admin API (legacy)
    • Bulk operations
    • Webhooks
    • ShopifyQL analytics
    Docs for Admin and data APIs on shopify.dev (opens in a new tab)

  4. Customer accounts

    • Customer Account API
    • Customer account UI extensions
    • Multipass and external login
    Docs for Customer accounts on shopify.dev (opens in a new tab)

  5. Checkout and payments

    • Checkout UI extensions
    • Thank you and Order status pages
    • Shop Pay
    • Payments Apps API
    Docs for Checkout and payments on shopify.dev (opens in a new tab)

  6. Shopify Functions

    • Discounts
    • Delivery customization
    • Payment customization
    • Cart and checkout validation
    • Cart transform
    • Rust or JavaScript
    Docs for Shopify Functions on shopify.dev (opens in a new tab)

  7. App development

    • Embedded admin apps
    • Polaris web components
    • App Bridge
    • OAuth and session tokens
    • App pricing and Billing API
    • React Router app template
    Docs for App development on shopify.dev (opens in a new tab)

  8. App extensions

    • Admin actions and blocks
    • Checkout UI
    • Customer account UI
    • Theme app blocks and embeds
    • Web pixels
    • POS UI
    Docs for App extensions on shopify.dev (opens in a new tab)

  9. POS and retail

    • POS UI extensions
    • Embedded POS apps
    • In-store pickup
    Docs for POS and retail on shopify.dev (opens in a new tab)

  10. Marketing and analytics

    • Web pixel extensions
    • Customer events
    • ShopifyQL
    • Marketing activities
    • Promotions
    Docs for Marketing and analytics on shopify.dev (opens in a new tab)

  11. International and B2B

    • Shopify Markets
    • Translations
    • Multi-currency
    • Duties and taxes
    • B2B companies
    • Catalogs and price lists
    Docs for International and B2B on shopify.dev (opens in a new tab)

  12. Fulfillment and shipping

    • Fulfillment services
    • Fulfillment Orders API
    • Delivery customization
    • Multi-store order sync
    Docs for Fulfillment and shipping on shopify.dev (opens in a new tab)

  13. Developer tooling

    • Shopify CLI
    • Theme Check
    • Dev Dashboard and dev stores
    • App and function logs
    • Partner API
    Docs for Developer tooling on shopify.dev (opens in a new tab)

  14. Shopify Plus

    • Checkout extensibility
    • Multi-store setups
    • Organization-level admin
    • Multipass and SSO
    Docs for Shopify Plus on shopify.dev (opens in a new tab)

  15. Ecosystem and distribution

    • Shopify App Store (public apps)
    • Custom apps
    • Sales channels
    • ERP, CRM and payment integrations
    Docs for Ecosystem and distribution on shopify.dev (opens in a new tab)

AI in my daily work

I build faster with AI, and I know where it fails

I use Claude, ChatGPT and other LLM tools every day for code, content and video. AI makes a good developer faster. It does not replace knowing Shopify. That is why this course teaches the basics first.

  • ClaudeCoding, code reviews and reading long docs fast.
  • ChatGPTIdeas, product copy and quick answers.
  • LLM workflowsPrompts, agents and automations for real client work.
  • AI video and imagesProduct videos, reels and visuals made with AI tools.

See my work, live

Real client stores I built. Pick a store and scroll through its full home page.

spacetalk.coOpen live store (opens in a new tab)
Full home page of spacetalk.co
Scroll inside the window to see the full home page.

More live stores I built. Click any store to open it.

Every store on this page started with the same basics you learn here: HTML, CSS, JavaScript and Liquid. Learn them one lesson at a time, and you can build stores like these too.

Saddam Husain

Learn the same work with me

Start with a self-paced course, or learn live with me every day for one month.

See all coursesLive 1:1 classes WhatsApp me