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Available for Shopify App & Theme Development

Shopify App &
Theme Developer.

I engineer conversion-focused custom Shopify themes and high-performance Shopify apps that scale. Minimal aesthetics, maximum storefront impact.

Shopify Plus Liquid React.js Node.js Next.js Polaris UI GraphQL Storefront API Shopify Plus Liquid React.js Node.js Next.js Polaris UI GraphQL Storefront API

Shopify Expertise

Shopify App Development

I build scalable, embedded public and private custom Shopify apps using React, Next.js, and Node.js. From complex GraphQL merchant data synchronizations to sleek embedded admin extensions using App Bridge and Polaris UI.

  • — Public App Store Deployment
  • — Admin UI & Checkout Extensions
  • — Partner Dashboard Management

Custom Theme Development

Expertise in drafting lightweight Shopify themes from scratch. I utilize Liquid templating, Online Store 2.0 architectures, sections everywhere logic, and custom metaobjects to give merchants supreme flexibility.

  • — Liquid Architecture
  • — Online Store 2.0 Configurations
  • — Custom Metaobjects / Metafields

Headless Commerce (Shopify)

Decoupling the frontend from the backend for blazing fast omnichannel experiences. Leveraging the Shopify Storefront API with modern frameworks like React and Next.js.

  • — Shopify Hydrogen / Oxygen
  • — Next.js Static Generation
  • — Headless Checkout Integration

E-commerce SEO & Speed

Auditing and optimizing Liquid themes for technical SEO ranking factors. Prioritizing Core Web Vitals, minimizing unoptimized apps, reducing JavaScript bloat, and implementing JSON-LD schema correctly.

  • — Technical SEO Audits
  • — Shopify Bundle Size Reduction
  • — Core Web Vitals Optimization

Tools & Technologies

React.js
Next.js
Node.js
Tailwind CSS
GraphQL
Shopify Polaris
Prisma / PostgreSQL
Figma
Vercel
Sanity CMS

How I Work

A streamlined, transparent process designed to turn complex requirements into high-performance Shopify solutions without the agency bloat.

Discovery & Architecture

We start by mapping your exact business logic. I analyze API limits, database structures, and define the exact technical architecture needed (Liquid vs Headless, App Bridge vs Standalone) before writing a single line of code.

Sprint Development

Rapid, iterative development with weekly check-ins. You get staging links to test features as they are built, ensuring the product always aligns with your expectations.

QA & Launch

Rigorous testing including Lighthouse audits, cross-browser compatibility, webhooks stress-testing, and app submission review if building for the Shopify App Store.

300+
Projects Delivered
9+
Years Experience
99/100
Lighthouse Scores
100%
Client Satisfaction

Client Feedback

"Rajat K is an exceptional web developer. His work on our complex Shopify backend with Linode and full stack (Postgres, GraphiQL, etc.) is AMAZING—bug-free, well-documented, and highly detailed. Working with him was smooth due to his language fluency, proactive communication, and on-time delivery. Top-of-the-line service! 🙌"

Jason Braatz
Fiverr Client

"He went above and beyond the call to get something working for us and did so on a tight schedule! I really appreciate all that he's done and he's an A+ developer for Shopify + Front end work and did a lot of JS / HTML / CSS as well for us. I'd highly recommend him!!"

Jason Braatz
Fiverr Client

"Rajat was great! It was my first time using him and I have now found my new go to Shopify developer. He was quick to respond. Great English fluency, knowledgeable and responsive. He also understood immediately what I was trying to accomplish. I would definitely encourage anyone looking for a Shopify developer or Flow developer to look here."

noahas1
Fiverr Client

"Rajat did an excellent job on setting up my web application and hosting it successfully. Professional, skilled, and efficient, he delivered high-quality work ahead of schedule. Communication was smooth and feedback was handled well. Highly recommend!"

Upwork Client
Upwork Platform

Frequently Asked Questions

How much does custom Shopify app development cost?

Custom Shopify app development costs vary widely based on requirements. Small private apps automating internal workflows might start around $2K, while complex public apps built with Node.js/React meant for the Shopify App Store can range from $5K to $15K+. Contact me for an accurate estimate based on your specific feature list.

Headless Shopify (Next.js/Hydrogen) vs Standard Liquid Themes?

A Headless Shopify build (using Next.js or Hydrogen) offers ultimate control, sub-second load times, and easy integration with CMSs like Sanity. I recommend it for brands scaling past $1M+/year who need unique experiences. A Standard Liquid Theme is better for rapid deployment and native compatibility with all marketplace apps.

Do you convert Figma designs to Shopify Themes?

Yes. I specialize in pixel-perfect PSD/Figma to Shopify conversions. I build them as Online Store 2.0 compatible themes, ensuring you retain the ability to edit content dynamically via Sections and custom Metafields without touching code.

Ready to build?

Need a custom Shopify app built from scratch? A high-converting premium typography-focused Shopify theme? Let's discuss your e-commerce requirements.

rajat.shopify@gmail.com

© 2026 Rajat Kumar. All rights reserved.

Official Shopify Partner