I build and extend Shopify storefronts, Plus implementations and custom apps — from pixel-accurate themes and advanced cart logic to migrations, B2B commerce and Shopify Functions.
Built for agencies, DTC brands and Shopify Plus teams.
Real Shopify engineering across storefronts, migrations, integrations, B2B commerce and custom apps.
Public Shopify App
A public Shopify App Store app that lets merchants control when Cash on Delivery appears at checkout, using rule conditions and a Shopify Payment Customization Function written in Rust.
Cart engineering & personalization
A personalised cart drawer where qualifying products can be badged or embossed, with per-product attribution, validation rules, gift wrapping and in-drawer discounts.
Storefront engineering inside production Plus themes
Implemented a recommendation and personalization application across live Shopify Plus themes — PDP and homepage carousels, search, collection filtering, bundles, quick view and cart upsells.
B2B, catalogs & markets
Shopify B2B configured for one store serving three customer segments — normal, B2B and VIP — each buying the same products at different prices.
Quiz funnel & custom result rendering
Moved an Octane AI quiz funnel into ConvertFlow and built the result experience as a custom Shopify section rendered on the fly from the quiz answers.
PrestaShop → Shopify migration
Migration of a high-volume supplements store from PrestaShop to Shopify — more than 200,000 customers and more than 200,000 orders.
WordPress → Shopify migration, 9,000+ products
Migrated a 9,000+ product catalogue and restructured it so colour duplicates became variants of a single Shopify product.
Historical order migration
Migrated historical orders from WordPress to Shopify with their original dates, line items, totals, shipping methods, attributes and payment information intact.
Storefront build & retention automation
Full-stack Shopify build from design concepts to a working storefront, plus Okendo and Omnisend automation for reviews and loyalty.
Theme development & store engineering
Custom theme development, store builds, app integrations and fixes to existing Shopify implementations across agency client stores.
Each one backed by production work, not a service list.
Themes built from design files, and custom behaviour added to themes that already exist in production.
Embedded admin apps with their own data model, install flow and Shopify integration.
Checkout behaviour that cannot be reached from the theme, implemented as Shopify Functions.
Third-party systems made to work inside the store rather than beside it.
Moving catalogues, customers and order history onto Shopify with the data model corrected on the way in.
Three years working inside partner-agency workflows, existing codebases and live production stores.
Shopify Plus-focused partner agency
Shopify Platinum Partner agency
Freelance and own product — not employment
I'm a Shopify Engineer with 3 years of hands-on experience building and extending production commerce systems. I've worked inside agency environments, Shopify Plus stores, migrations, third-party app ecosystems and custom Shopify applications.
Day to day that means storefront engineering in Liquid and JavaScript, backend and app development in Node.js and React, API work through GraphQL and the Admin and Storefront APIs, commerce logic in Shopify Functions, catalogs and cart attributes — and the debugging that comes with changing stores that are already taking orders.
I work remotely with agencies and brands internationally, usually on the parts of a Shopify build that need custom engineering.
On agency work the theme already has cart JavaScript, state handling and installed apps. I work out how it behaves before adding to it, so new features join the existing flow instead of competing with it.
Checkout behaviour belongs in a Shopify Function, catalogue pricing belongs in catalogs and markets, personalization data belongs in cart attributes and metafields — not in workarounds layered on the theme.
Fewer, wider GraphQL requests instead of repeated per-item calls, Liquid trimmed where it costs, placeholders where they prevent layout shift.
Rapid cart interactions, multiple qualifying products, invalid input, apps that touch the same cart. Abort control, validation and defensive handling are part of the build, not a later fix.
Reviews from completed Upwork contracts.
"Rahul is an exceptional Shopify developer. He transformed our Figma designs into a fully functional Shopify theme with precision and attention to detail. His expertise in Shopify Plus and custom app integrations was invaluable. Highly recommended!"
"Rahul went above and beyond; he communicated clearly and worked quickly to complete the task at hand. Will definitely be hiring him for future projects and I recommend him to anyone needing help with Shopify."
"Good work."
"Great work with a quick turnaround as always. Will rehire again when needed."
"Rahul went above and beyond to solve an issue that I was having. He always delivers on time with the best solution. I will definitely rehire him again!"
"Rahul is a fantastic developer. He delivered exactly what I needed and did it quickly. I will definitely be working with him again!"
Send me the brief, the store, or the problem. I'm interested in difficult Shopify work — from storefront engineering and integrations to custom apps, migrations and Plus implementations.