12+ Years Experience · Web & Ecommerce Engineering

Senior Web Developer & Ecommerce Specialist.

I'm a Senior Web Developer and Shopify Expert specializing in scalable ecommerce development. I help brands build high-performance websites and online stores using platforms like Shopify, Shopify Plus, WordPress, Squarespace, and modern headless solutions. From technical architecture and frontend engineering to performance optimization and technical SEO, I focus on creating fast, reliable digital experiences that improve user engagement, conversions, and long-term business growth.

Web DevelopmentUI/UX DesignShopify & Shopify PlusEcommerce
I am a |

Design to code

  • PSD, Figma, XD, HTML → production-ready builds
  • Responsive layouts & custom design systems
  • UI/UX optimization & accessibility

Full-stack delivery

  • Frontend, CMS, APIs & integrations
  • Code reviews, mentoring, agile workflows
  • Performance, SEO, automation & QA
Start a projectSee services
Ajay Karan Sharma Senior Shopify Plus Developer
Available for Projects
Shopify Plus Expert Hydrogen Headless Checkout Extensibility POS & Shopify Functions Liquid 2.0 Themes APIs Integration Backend Node.js & PHP
SENIOR SHOPIFY & FULL-STACK DEVELOPER

High-Performance Shopify & Full-Stack Web Development

Senior Shopify Plus Developer with 12+ years of expertise building enterprise Liquid themes, Hydrogen (Remix) headless storefronts, custom checkout apps, and high-converting scalable platforms.

Shopify Plus Storefronts

Custom Liquid 2.0 themes, POS & Checkout UI Extensions, Shopify Functions, and multi-currency localized checkouts.

Headless Commerce

Sub-second page loads using Shopify Hydrogen (Remix), GraphQL Storefront API, React, Next.js, and Sanity CMS.

Full-Stack & Backend APIs

Node.js, Express, PHP, Laravel, REST & GraphQL Admin APIs, Webhooks, microservices, and custom database engineering.

Custom Apps & Cloud DevOps

Custom private Shopify apps, Node/Remix serverless workflows, CI/CD automated deployments, Vercel, Netlify.

Shopify & Technical Stack

50+ Skills & Tech
Shopify Plus Liquid 2.0 Hydrogen (Remix)Checkout UI ExtensionsShopify FunctionsGraphQL Storefront APIGraphQL Admin APIREST Admin APICart TransformationsCustom Private AppsTheme App ExtensionsShopify POS ExtensionsShopify CLIShopify FlowMetafields & MetaobjectsHeadless CommerceReact.jsNext.jsTypeScriptJavaScript (ES6+)Node.jsHydrogenPHPLaravelWordPressWooCommerceWebflowWix & SquarespaceTailwind CSSSCSS / CSS3HTML5Sanity CMSStrapi CMSWebhooks IntegrationERP & CRM IntegrationsGit & GitHubCI/CD PipelinesVercelNetlifyDockerPostgreSQLMSSQLMySQLRedisBullMQPipe17Klaviyo IntegrationRecharge SubscriptionsYotpo & GorgiasGA4 & GTM TrackingCore Web VitalsSpeed OptimizationTechnical SEOSchema MarkupSite MigrationsAI Tools & Workflows
Stats

Key Metrics that Speak to My Expertise

A snapshot of my professional journey and the impact I've made in the web and ecommerce space.

12+Years of Web & Ecommerce Development Experience
750+Shopify & Ecommerce Stores Delivered Globally
1,000+Shopify Stores & 100k+ Products Synced via CIP System
Global ClientsRemote-First Collaboration Across US, India & Worldwide
About

Senior Web Developer & Ecommerce Architect delivering scalable digital platforms.

I am Ajay Karan Sharma, a senior web developer and Shopify expert in India specializing in high-performance websites and ecommerce development. I collaborate with design, product, and growth teams to architect, build, and optimize digital platforms that drive measurable business outcomes.

My expertise spans full-stack development, Shopify and Shopify Plus builds, custom WordPress solutions, and modern React/Node architectures. From discovery and UX planning to deployment, performance optimization, and technical SEO, I ensure every project launches with speed, stability, and long-term scalability.

End-to-End Development

Complete ownership from architecture to launch for scalable web and ecommerce platforms.

Performance & Technical SEO

Core Web Vitals optimization, structured data, speed diagnostics, and search visibility improvements.

Modern Frontend Engineering

React, JavaScript, Liquid, and responsive UI systems built for performance and scalability.

Shopify & CMS Expertise

Shopify, Shopify Plus, WordPress, Webflow, and API-driven ecommerce implementations.

Infrastructure & Deployment

Vercel, Netlify, traditional hosting, SSL setup, CI/CD pipelines, and environment management.

Analytics & Growth Optimization

Funnels, experimentation, reporting, conversion rate optimization, and AI-assisted workflows.

Key Milestones & Achievements

🏆
750+ Shopify Stores Delivered

Successfully designed, engineered, and launched over 750 high-performance Shopify storefronts ranging from early-stage startups to enterprise DTC brands.

⚡
Centralized Inventory Processing (CIP)

Built enterprise CIP application using ReactJS, Node.js, MSSQL & PostgreSQL syncing real-time inventory across 1,000+ stores & 100,000+ products.

🛒
Checkout & POS UI Extensions

Spearheaded Shopify Plus Checkout UI Extensions and POS UI Extensions for seamless omnichannel in-store & online customer checkout workflows.

🎓
Engineering Mentorship & Training

Led 4-month developer development program, training 4 junior engineers in Liquid templating, Shopify CLI, ThemeKit, and Checkout UI Extensions.

Technical Expertise & Toolbox

  • HTML5, CSS3, SCSS
  • JavaScript (ES6+)
  • TypeScript & ReactJS
  • Responsive & Mobile-First Design
  • Accessibility (WCAG Basics)
  • Cross-Browser Compatibility
  • UI/UX Implementation
  • React & Next.js
  • Node.js & Express
  • Liquid Templating
  • APIs Integrations
  • Storefront API & Admin API
  • Webhooks & Middleware
  • Hydrogen (Headless Commerce)
  • Shopify & Shopify Plus
  • Shopify Theme 2.0 Development
  • Checkout & POS UI Extensions
  • Centralized Inventory Sync (CIP)
  • WordPress & WooCommerce
  • Squarespace (7.0 / 7.1), Webflow, Wix
  • App Integrations & Metafields
  • MSSQL (Microsoft SQL Server)
  • PostgreSQL & SQLite
  • Redis & BullMQ Queue
  • Performance & Core Web Vitals
  • Technical SEO & Schema Markup
  • Speed Audits & Refactoring
  • Conversion Rate Optimization
  • Vercel & Netlify Deployment
  • Pipe17 & ERP/CRM Sync
  • CI/CD & Git Workflows
  • Shopify CLI & ThemeKit
  • Postman, JIRA, Confluence, VS Code
  • GitHub Version Control
  • AI Tools: Antigravity, Cursor, ChatGPT, Claude, Gemini, Copilot

Education & Training Credentials

B.Tech — Computer Science & Engineering (CSE)

Himachal Pradesh Technical University

2011 - 2014

3 Year Diploma — Computer Science & Engineering (CSE)

Punjab Technical University

2007 - 2010

+2 Non-Medical

NIOS

2012

Team Training & Developer Development Lead

Given Team Training & Development (Pune)

Jan 2025 - Apr 2025
Experience

Senior Shopify & Full-Stack Engineer — From Architecture to Execution.

Over a decade of building high-performance ecommerce platforms, scalable web applications, and revenue-focused digital systems. I operate across strategy, architecture, engineering, and delivery — ensuring every build is technically sound, SEO-optimized, and conversion-driven.

Professional Career History

Senior Systems Analyst

Skillnet Solution Inc.
March 2026 – PresentMumbai (Remote)
  • Designed and developed custom Shopify and Shopify Plus themes using Liquid, Online Store 2.0 architecture, and modern frontend tools (ReactJS, HTML5, CSS3, JavaScript) to deliver high-performance storefronts.
  • Built reusable custom sections, app blocks, and integrated advanced Shopify features (metafields, custom apps) based on Figma/PSD assets to enhance user experience.
  • Developed custom Shopify POS UI Extensions and Checkout UI Extensions to optimize cart operations, in-store retail workflows, and customer checkout flows.
  • Architected a Centralized Inventory Processing (CIP) backend (ReactJS, Node.js, MSSQL) ensuring real-time synchronization across 1,000+ Shopify stores and 100,000+ products.
Key Impact: Engineered a centralized inventory backend that seamlessly synced 100,000+ products across 1,000+ connected Shopify stores in real-time.
Shopify PlusReactJSNode.jsMSSQLPostgreSQLRedisBullMQPOS UI ExtensionsCheckout UI ExtensionsPipe17

Senior Software Engineer – Shopify

Haptiq
March 2023 – March 2026Pune (Remote)
  • Architected and delivered custom Shopify and Shopify Plus solutions, leveraging Liquid and Online Store 2.0 to build highly optimized, high-converting dynamic storefronts for global eCommerce brands.
  • Pioneered the development of headless commerce architectures using Shopify Hydrogen, ReactJS, and Remix, deploying robust storefronts via Vercel and automated GitHub Actions CI/CD pipelines.
  • Engineered secure private Shopify apps leveraging GraphQL and REST APIs to create custom data pipelines between the Shopify Admin and external systems.
  • Enforced rigorous coding standards and best practices through technical code reviews, mentoring junior engineers in modern Shopify CLI workflows and responsive design.
Key Impact: Accelerated time-to-market for premium brands by establishing modular, reusable Shopify theme components.
Shopify PlusLiquid 2.0HydrogenReactJSPrivate Shopify AppsGraphQLVercelCI/CDMentorship

Senior Shopify Developer

Upbrighter IT Services Pvt. Ltd.
September 2022 – March 2023Mohali (Remote)
  • Led the end-to-end technical execution and successful launch of 100+ bespoke Shopify stores, translating complex Figma, XD, and PSD wireframes into pixel-perfect, responsive code.
  • Executed advanced Technical SEO strategies, including custom schema markup and site speed optimization, resulting in measurable increases in organic search visibility and conversion rates.
  • Optimized critical user flows by developing custom checkout extensibility elements and modular landing page sections to maximize average order value (AOV) and reduce cart abandonment.
Key Impact: Maintained a 100% project delivery rate across 100+ store launches with exceptional client satisfaction scores.
ShopifyLiquidTheme CustomizationTechnical SEOFigma/PSD to CodeCheckout Extensibility

Senior Web Developer

Private Ferm
January 2015 – April 2022Dharamshala
  • Successfully delivered 700+ diverse web development projects, serving as the lead technical expert for e-commerce platforms including Shopify, WordPress/WooCommerce, and Squarespace.
  • Managed the complete software development lifecycle, from system architecture and custom theme development to complex catalog migrations and cross-browser QA.
  • Engineered tailored client solutions by refactoring legacy codebases, implementing custom page builders, and drastically improving Core Web Vitals and site speed.
Key Impact: Established a scalable development workflow that enabled the rapid deployment of hundreds of robust web properties.
ShopifyWordPressWooCommerceSquarespaceHTML5/CSS3JavaScriptCross-Browser Optimization

Lead Developer Trainer & Mentor

Given Team Training & Development
January 2025 – April 2025Pune
  • Designed and led a comprehensive technical training program for a cohort of junior engineers, focusing on advanced Shopify theme development, Liquid templating, and Checkout UI Extensions.
  • Facilitated intensive pair-programming and code review sessions to elevate the team's engineering standards, focusing on clean architecture, responsive design, and performance optimization.
Key Impact: Successfully upskilled 4 junior engineers into highly productive team members capable of autonomous feature delivery.
Developer MentorshipShopify Plus TrainingCheckout UI ExtensionsCode ReviewShopify CLI

Technical Architecture & Engineering Leadership

  • Architected enterprise-grade, high-performance eCommerce platforms utilizing headless architectures, ReactJS, and advanced Shopify APIs.
  • Established rigorous engineering standards, scalable CI/CD Git workflows, and comprehensive code review processes.
  • Directed cross-functional initiatives, bridging the gap between product managers, marketing teams, and developers.
  • Orchestrated complex platform migrations ensuring zero-downtime and data integrity.
  • Translated ambiguous business objectives into actionable, scalable, and future-proof technical roadmaps.

Advanced Shopify & Full-Stack Development

  • Engineered bespoke Shopify Plus storefronts, leveraging custom Liquid themes, dynamic sections, and complex Checkout UI extensions.
  • Seamlessly integrated mission-critical third-party services, including ERPs, CRMs, global payment gateways, and shipping algorithms via REST/GraphQL APIs.
  • Developed highly responsive, accessible, and interactive user interfaces using modern ReactJS, ES6+, and modular CSS architectures.
  • Built robust backend microservices, real-time webhooks, and custom automation workflows.
  • Translated high-fidelity UI/UX wireframes (Figma, XD) into pixel-perfect, highly optimized, and responsive web applications.

Performance Optimization & Technical SEO

  • Systematically optimized Core Web Vitals (LCP, CLS, INP), drastically reducing page load times and elevating global search rankings.
  • Implemented sophisticated Technical SEO strategies, including comprehensive schema markup, canonical structuring, and automated crawl optimizations.
  • Minimized asset bundle sizes and configured advanced caching layers and CDN edge networks.
  • Executed rigorous technical audits to identify and resolve critical rendering bottlenecks, indexing issues, and memory leaks.
  • Directly correlated technical performance enhancements to measurable increases in user retention and eCommerce conversion rates.

Cloud Infrastructure, DevOps & Automation

  • Architected and maintained robust CI/CD deployment pipelines to enable continuous delivery across multiple environments.
  • Administered scalable cloud hosting infrastructure utilizing modern edge platforms like Vercel and Netlify.
  • Managed complex DNS configurations, secure SSL provisioning, and zero-trust environment isolation for enterprise clients.
  • Deployed comprehensive monitoring, automated error logging, and incident response systems to ensure 99.9% uptime.
  • Engineered custom automation scripts to eliminate manual deployment tasks.

Where I Add Immediate Value

  • Architecting and leading complex Shopify Plus builds and enterprise re-platforming initiatives.
  • Diagnosing and resolving critical performance, technical SEO, and scalability bottlenecks.
  • Conducting comprehensive technical audits to refactor and optimize legacy codebases.
  • Serving as the strategic bridge between business stakeholders and engineering execution.
  • Translating ambiguous business concepts into actionable, shippable product roadmaps.

Engagement Models

  • Embedded Technical Lead: Driving engineering excellence within existing product and design teams.
  • Strategic Consultant: Advising high-growth agencies and global ecommerce brands on Shopify best practices.
  • End-to-End Ownership: Managing the full product lifecycle from initial discovery to continuous optimization.
  • Specialized Auditor: Providing targeted technical SEO, Core Web Vitals, and performance audits.

Business Impact Focus

  • Revenue-Driven Engineering: Aligning technical architecture directly with business KPIs and revenue growth.
  • Conversion Optimization (CRO): Designing performant, accessible user experiences that reduce friction.
  • Data-Backed Iteration: Utilizing A/B testing and analytics to drive continuous product experimentation.
  • Sustainable Scalability: Architecting solutions prioritized for long-term maintainability and rapid scaling.
Services

Engineering & Ecommerce Solutions for Growth-Focused Brands.

I help businesses architect, build, optimize, and scale high-performance websites and Shopify ecosystems — combining technical depth with conversion-driven execution.

🧠

Strategy, Audits & Technical Roadmapping

Clear technical direction before a single line of code is written — focused on scalability, performance, and measurable business growth.

  • ✔ Technical SEO & performance audits
  • ✔ Ecommerce architecture planning (Shopify & headless)
  • ✔ Platform selection & migration strategy
  • ✔ Conversion-focused experimentation roadmap
  • ✔ Risk analysis & scalability planning
⚙️

Custom Design Implementation & Development

Pixel-perfect, performance-first builds from Figma, XD, or PSD into production-ready Shopify, React, and CMS systems.

  • ✔ Custom Shopify themes (Online Store 2.0)
  • ✔ Advanced cart logic & checkout customization
  • ✔ Responsive UI systems & reusable components
  • ✔ API integrations, webhooks & backend logic
  • ✔ Accessibility & clean code standards
🛒

Ecommerce & CMS Platform Expertise

Deep hands-on experience across commerce and content platforms — tailored to business scale, complexity, and growth stage.

  • ✔ Shopify & Shopify Plus development
  • ✔ Headless commerce (React / API-driven builds)
  • ✔ WordPress & WooCommerce custom solutions
  • ✔ Webflow, Wix & Squarespace builds
  • ✔ CMS content modeling & governance setup
🚀

Infrastructure, DevOps & Optimization

Beyond development — ensuring your platform is secure, fast, reliable, and built for long-term growth.

  • ✔ Hosting setup (Vercel, Netlify, traditional servers)
  • ✔ Domain, DNS, SSL & environment management
  • ✔ CI/CD pipelines & deployment automation
  • ✔ Core Web Vitals & performance optimization
  • ✔ Monitoring, analytics & reporting systems
📈

Performance Optimization & CRO

Speed, usability, and data-driven improvements that directly impact revenue, SEO rankings, and customer experience.

  • ✔ Core Web Vitals optimization (LCP, CLS, INP)
  • ✔ Shopify speed audits & theme refactoring
  • ✔ Conversion rate optimization (CRO) experiments
  • ✔ A/B testing & funnel performance analysis
  • ✔ Image, asset & bundle size optimization
🔄

Platform Migration & Replatforming

Seamless transitions from legacy systems to modern, scalable commerce platforms without SEO loss or downtime.

  • ✔ WooCommerce / Magento to Shopify migrations
  • ✔ Shopify 1.0 to 2.0 upgrades
  • ✔ CMS restructuring & URL mapping
  • ✔ Data migration (products, customers, orders)
  • ✔ SEO-safe redirects & performance validation
🔗

API Integrations & Automation

Connecting your ecommerce system with payment gateways, logistics, CRMs, ERPs, and marketing platforms.

  • ✔ Payment gateway & shipping integrations
  • ✔ ERP, CRM & inventory system connections
  • ✔ Custom API & webhook development
  • ✔ Workflow automation & process optimization
  • ✔ Marketing & email automation integrations
🎯

Technical Consulting & Team Enablement

Senior-level guidance for agencies, startups, and enterprise teams needing architecture clarity and engineering direction.

  • ✔ Codebase audits & refactoring strategy
  • ✔ Engineering standards & documentation
  • ✔ Mentoring developers & cross-team alignment
  • ✔ Technical hiring consultation
  • ✔ Long-term scalability planning

Need a senior Shopify/Web Developer for your next project?

Let's Discuss Your Project
Shopify Center of Excellence

When it comes to Shopify — I don't just build. I architect and optimize for scale.

Deep platform mastery spanning Shopify Plus, Hydrogen, Checkout Extensibility, and Online Store 2.0. From complex migrations to custom checkout UI extensions, I've led 50+ store launches and helped brands scale from early-stage growth to multi-million revenue operations.

750+Shopify store launches & platform migrations
Shopify PlusCheckout Extensibility & custom UI implementations
HydrogenHeadless commerce storefront builds
Core Web VitalsPerformance & SEO-driven engineering

Platform Mastery

  • Shopify Plus architecture & enterprise configurations
  • Checkout Extensibility & custom checkout UI extensions
  • Liquid development, metafields & dynamic content systems
  • Online Store 2.0 theme architecture
  • Technical Shopify SEO & schema implementation

Build, Migrate & Integrate

  • Custom Shopify theme development (performance-first)
  • Hydrogen headless storefront builds
  • Private & custom app integrations
  • Payment & shipping API integrations
  • Zero-downtime store migrations & data transfers

Optimization & Long-Term Scale

  • Speed optimization & Core Web Vitals improvement
  • Conversion rate optimization (CRO) experiments
  • Custom landing pages & high-performing PDPs
  • Analytics, tracking & performance monitoring
  • Post-launch maintenance & scaling strategy

Advanced Shopify Capabilities

  • Custom Shopify app development (private & custom apps)
  • Shopify Functions & Checkout Extensibility migrations
  • Headless commerce using Hydrogen & Storefront API
  • Subscription models, bundles & advanced pricing logic
  • Multi-store & international expansion architecture
  • B2B configurations & wholesale storefront setup
  • Advanced metafield systems & dynamic content modeling

Business Impact I Focus On

  • Faster page loads → better SEO rankings
  • Optimized checkout flows → higher conversion rates
  • Clean architecture → easier long-term scaling
  • Data-driven iteration → measurable revenue growth
  • Automation systems → reduced operational overhead

Typical Shopify Engagements

  • Rebuilding underperforming Shopify stores
  • Migrating from WooCommerce, Magento or custom stacks
  • Fixing performance & Core Web Vitals issues
  • Implementing Checkout Extensibility before Shopify deadlines
  • Acting as senior Shopify consultant for agencies

Planning a Shopify build, migration, or performance upgrade?

Talk to a Shopify Specialist
Case Studies

Real builds. Real brands. Real outcomes.

A selection of Shopify, Shopify Plus, Hydrogen, WooCommerce projects — covering migrations, performance, checkout customization, and scalable ecommerce architecture.

Shopify Plus · Checkout Extensibility · EnterpriseMrs. Fields (US)

Spearheaded Shopify Plus custom features and checkout extensibility implementation supporting high-volume DTC transactions and merchandising flexibility.

  • Custom Online Store 2.0 sections, metafields & dynamic merchandising
  • Checkout Extensibility & custom Checkout UI extensions
  • Performance optimization & seamless payment integrations
Shopify PlusLiquidCheckout ExtensibilityJavaScriptSEO
Visit MrsFields.com
Shopify Plus · Global E-CommerceMrs. Fields Australia

Engineered localized Shopify Plus storefront tailored for Australian retail markets, custom catalog structure, and optimized checkout flow.

  • Custom theme development & responsive layout design
  • Localized currency, shipping rules & inventory management
  • Speed optimization and Core Web Vitals refinement
Shopify PlusLiquid 2.0Custom SectionsCRO
Visit MrsFields.com.au
Hydrogen · Headless Shopify · ReactTechniks Tool

Built and maintained a high-speed headless storefront using Shopify Hydrogen framework for sub-second page loads and custom catalog experiences.

  • Hydrogen React storefront architecture & reusable components
  • Storefront API & GraphQL optimized data fetching
  • Vercel deployments & automated Git CI/CD workflows
HydrogenReactJSGraphQLStorefront APIShopify Plus
Visit Techniks USA
Vercel · Headless · UX + PerformanceHealthyBaby

Delivered Shopify storefront enhancements focused on Core Web Vitals, conversion rate optimization (CRO), and seamless shopping UI patterns.

  • PDP & Collection page refactoring with custom Liquid blocks
  • Performance cleanup & render-blocking script removal
  • App integrations & subscription checkout optimizations
ShopifyReactCore Web VitalsVercelCRO
Visit HealthyBaby.com
Web Platform · High VolumeNFHS Learn

Supported frontend development, accessibility (WCAG), and responsive UX for large-scale online education and certification platform.

  • Custom UI components, layout stability, and accessibility fixes
  • Cross-browser compatibility testing & performance tuning
  • Scalable digital platform frontend execution
HTML5/CSS3JavaScriptWCAG BasicsResponsive UX
Visit NFHSLearn.com
Enterprise E-Commerce · Multi-StoreFollett Corp

Worked on enterprise-level e-commerce integrations, multi-store architecture, and catalog operations for large retail distributor.

  • Complex catalog management, product imports/exports
  • Custom API integrations & middleware data sync
  • Enterprise web standards & code maintainability
Enterprise E-CommerceAPIsShopify Admin APIIntegrations
Visit Follett.com
Enterprise SaaS · Node.js + React + DatabasesCentralized Inventory Processing (CIP)

Custom enterprise application syncing real-time inventory and catalog data across 1,000+ Shopify stores and 100,000+ products.

  • ReactJS dashboard with Node.js & Express backend engine
  • Microsoft SQL Server (MSSQL), PostgreSQL, Redis & BullMQ queuing
  • Pipe17 integration & automated multi-store webhook handlers
ReactJSNode.jsMSSQLPostgreSQLRedisBullMQ
Skills & Platforms

Full-stack ecommerce engineering — Shopify-first, performance-driven.

I design and build scalable storefronts, headless experiences, and conversion-focused product pages. From Shopify Plus checkout extensibility to Hydrogen builds, I ship clean architecture that performs.

Shopify Plus · Checkout ExtensibilityHydrogen · Headless CommerceCore Web Vitals · Technical SEOApps · APIs · WebhooksMigrations · Rebuilds · RefactorsCRO · Analytics · Tracking
🛒

Shopify Engineering

Deep Shopify development across themes, apps, APIs, storefront UX and Plus-level scaling.

  • Shopify Store 2.0 theme architecture
  • Liquid templates, sections, blocks, metafields
  • Cart / PDP optimization and custom flows
  • Admin API + Storefront API integrations
  • Private apps, custom apps, app integrations
🧩

Shopify Plus & Checkout

Advanced Shopify Plus work: checkout extensibility, UI extensions, and scalable commerce architecture.

  • Checkout UI Extensions (best-practice implementation)
  • POS UI Extensions (retail flows)
  • Shopify Functions (discounts, logic, validations)
  • B2B & international setup strategy
  • Implementation planning for Shopify timelines
⚡

Performance & Technical SEO

Speed + SEO is not optional. I optimize templates, assets, and rendering for better rankings & conversion.

  • Core Web Vitals: LCP, CLS, INP improvements
  • Schema markup / structured data
  • Image strategy, lazy-loading, critical CSS
  • Caching/CDN strategies and bundle optimization
  • SEO-safe migrations + redirects mapping
🧠

Headless & Modern Frontend

Modern frontends that are maintainable, scalable, and built for real business workflows.

  • Hydrogen storefront builds
  • React component systems + reusable UI patterns
  • Next.js experience (SSR/ISR patterns)
  • TypeScript-ready builds and clean architecture
  • Accessibility and responsive UX refinement
🔗

APIs, Integrations & Automation

Connecting systems end-to-end: payments, shipping, marketing, ERP/CRM, and custom automation.

  • REST / GraphQL API integration
  • Webhooks, middleware, data sync pipelines
  • Shipping, payment, inventory integrations
  • Marketing & email automation integrations
  • Debugging with Postman and structured logs
🚀

Delivery, DevOps & Collaboration

Professional delivery workflows that keep releases calm, trackable, and stable.

  • Git / GitHub workflows + code reviews
  • CI/CD + staging environments (Vercel/Netlify)
  • Domains, DNS, SSL, environment isolation
  • Agile rituals: planning, standups, retros
  • Documentation & handover that teams trust
ShopifyShopify PlusLiquidHydrogenCheckout UI ExtensionsPOS UI ExtensionsShopify FunctionsReactNext.jsJavaScriptTypeScriptHTML5CSS3SCSSTailwindNode.jsREST APIGraphQLWebhooksGitGitHubVercelNetlifyPostgreSQLMSSQLRedisCore Web VitalsTechnical SEOSchema MarkupCROAnalyticsChatGPTCursorCopilotGeminiClaudeAntigravity
Frontend & responsive UX97%
Shopify / Ecommerce (Plus, Hydrogen, Checkout)96%
Performance optimization & technical SEO94%
CMS ecosystems & integrations93%
APIs, automation & DevOps delivery90%
Client Testimonials

Trusted by ecommerce teams and growing brands.

Feedback from clients, engineering teams, and product leaders I've worked with across Shopify, headless commerce, and high-performance web builds.

★★★★★

Ajay helped us implement complex Shopify Plus checkout extensions while keeping performance extremely fast. His ability to translate technical requirements into business outcomes made our launch smooth.

RC
Director of EcommerceRetail Collective
★★★★★

From Hydrogen storefront builds to mentoring our internal developers, Ajay consistently delivers high-quality work. His attention to detail and communication made collaboration effortless.

DL
Head of EngineeringDTC Lifestyle Brand
★★★★★

Ajay translated our Figma designs into a fast, fully responsive storefront in record time. The code quality and documentation made it easy for our team to continue scaling the project.

TC
Product Design LeadTechnology Company
★★★★★

We initially hired Ajay to stabilize our frontend stack, but he ended up improving our entire deployment workflow and mentoring multiple developers on best practices.

BS
Engineering ManagerB2B SaaS Platform
★★★★★

Ajay bridges the gap between design and engineering perfectly. Our marketing team loved how quickly ideas could become production-ready landing pages and experiments.

GL
Growth LeadDTC Brand
★★★★★

Calm under pressure and extremely reliable during critical releases. Ajay is someone you want responsible for complex ecommerce launches.

DA
Program DirectorDigital Commerce Agency
Need Clarity?

Questions I Get Before We Build Something Great

Direct answers on engineering strategy, Shopify Plus architecture, headless storefronts, speed optimization, and project delivery workflows.

Engineering Standards

Clear process. Fast execution. Zero guesswork.

I focus on scalable ecommerce architecture, conversion-focused UX, clean code maintainability, and predictable launches.

  • Clean Liquid & Online Store 2.0
  • 90+ Core Web Vitals targets
  • Seamless API & Webhook sync
  • Dedicated launch & post-QA support

Have a custom requirement?

Let's Talk Project Scope

Yes. I architect bespoke Online Store 2.0 themes using Liquid, HTML5/CSS3, ReactJS, and modular JSON templates. Rather than relying on bloated pre-made templates, I engineer custom section schemas, dynamic metafield integrations, and conversion-optimized cart workflows tailored to your exact brand identity.

Online Store 2.0 Modular Section Schemas Blazing Fast Load Speed

I build native Checkout UI Extensions, POS UI Extensions, and custom Shopify Functions (discounts, payment rules, delivery validations). For complex operations, I engineer secure private apps using Node.js, Express, ReactJS, and GraphQL Admin APIs to synchronize inventory, ERP, and CRM platforms in real time.

Checkout UI Extensions Shopify Functions Private App & API Sync

Performance and SEO are core architecture pillars. I eliminate render-blocking assets, refactor unoptimized Liquid templates, implement critical inline CSS, lazy load media, inject structured JSON-LD schema markup, and optimize bundle sizes—consistently achieving LCP under 2.5s and 90+ Mobile Performance scores.

LCP < 2.5s Target JSON-LD Structured Data Mobile-First Optimization

Yes. For enterprise brands seeking instant page transitions and full custom frontend freedom, I build headless storefronts using Shopify Hydrogen + Remix / ReactJS or Next.js, powered by Storefront GraphQL APIs and deployed with automated CI/CD pipelines on Vercel or Netlify.

Hydrogen + ReactJS Storefront GraphQL API Vercel CI/CD Pipelines

A full rebuild is not always necessary. I perform targeted theme refactoring, section enhancements, and zero-downtime platform migrations (from WooCommerce, WordPress, Magento, or Squarespace to Shopify Plus), guaranteeing 100% 301 URL redirect accuracy and preserving existing SEO authority.

Zero-Downtime Migration 301 SEO URL Mapping Isolated Staging Audits

Every engagement follows a clear agile lifecycle: Technical Discovery → Wireframe/Figma Review → Sprint Development → QA & Speed Audit → Controlled Production Release. Post-launch, I provide retainer support for continuous feature development, security monitoring, and conversion enhancements.

Transparent Communication Git Version Control Post-Launch Retainer Support
Let's collaborate

Ready to Build Something Exceptional?

Partner with a Senior Shopify & Full-Stack Engineer who delivers clean architecture, lightning-fast storefronts, and measurable business outcomes. Let's turn your vision into a high-performance digital reality.

Available for new projects
Email me directlyajaykaran2424@gmail.com
WhatsApp+91 9418 638 495
LinkedInlinkedin.com/in/ajaykaransharma
LocationHimachal Pradesh, India · Remote Worldwide
≤ 1hAvg. Response
12+Years Experience
700+Projects Delivered
Senior Shopify & Full-Stack Engineer

Let's Build Your
Next Milestone

From complex Shopify Plus architecture and Checkout Extensibility to headless storefronts and custom enterprise applications — I deliver production-ready solutions that scale.

  • Shopify Plus builds, themes & Checkout UI Extensions
  • Custom feature development, App and Theme development
  • Hydrogen headless storefronts & React frontends
  • Performance optimization & Core Web Vitals (90+ scores)
  • Platform migrations, Technical SEO & API integrations
  • Long-term retainer & ecommerce continuous support
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Shopify PlusHydrogenReactJSNode.jsGraphQLTechnical SEO
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