E-Commerce & Performance Specialist

Building High-Speed, Automated Storefronts

I am a Software Engineer at Tech Mahindra. I design, optimize, and build custom Shopify themes, robust CI/CD pipelines, and AI-powered automation utilities that turn page speed into customer conversions.

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Performance

Lighthouse Score

Shopify Developer

Liquid Expert

+35%

Lighthouse Score Increase

15+

Storefront Enhancements

-80%

Manual DevOps Deployment Effort

1 Year

Promotion to Software Engineer

Core Competencies

Technological assets and tools I use to deliver high-quality web applications.

JavaScript

HTML5 & CSS3

Java

PHP

SQL

React

Tailwind CSS

DOM Manipulation

Responsive CSS

NodeJS

ExpressJS

Spring Boot

Laravel

Shopify liquid

Custom Theme Design

Shopify API integrations

Git & GitHub Actions

Docker

AWS Services

AI Tools (GitHub Copilot)

Professional Journey

June 2025 — Present

Software Engineer

Tech Mahindra

Lead site performance engineering (+35% Lighthouse scores) and CI/CD automation. Coordinate team training for AI tools and mentor junior developers. 💡 Click for details

March 2024 — June 2025

Associate Software Engineer

Tech Mahindra

Built responsive Shopify storefront layouts and custom Liquid sections. Developed Java automation suites reducing manual testing cycles by 50%. Recipient of 4 Bravo awards. 💡 Click for details

Education & Certifications

2019 — 2023

B.Tech in Computer Science

Regent Education & Research Foundation

Focused on Software Engineering, Databases, and Web Development. Graduated with an overall score of 85%. 💡 Click for details

Certifications

AWS & AI Systems

Amazon Web Services & Internal Badges

Certified AWS Practitioner, and recipient of AI White Belt and AI Blue Belt credentials. 💡 Click for details

Case Studies & Brand Deliveries

Official storefronts delivered for global Shopify merchants, emphasizing speed, design fidelity, and DevOps automation.

Commercial Shopify Storefronts

Performance Tuning Liquid / JS

Escentric Molecules

Optimized script loading strategies, deferred heavy marketing tags, and restructured image source-sets on this high-end fragrance store, improving Lighthouse scores by up to 35%.

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Theme Development CSS Grid / Liquid

Bluebella

Developed premium custom theme sections, responsive collection layout grids, and interactive cart drawer states to improve buyer flows and mobile shopping UX.

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DevOps & CI/CD GitHub Actions / Docker

Castore

Engineered automated theme verification pipelines using GitHub Actions, reducing manual deployment efforts by 80% and introducing automated theme linting audits.

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Theme Development Liquid / CSS3

Hynes Eagle

Built custom theme sections for travel gear layouts and optimized the responsive menu navigation for clean rendering on standard mobile viewports.

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Performance Tuning Script Deferrals / JS

Iron Heart

Conducted theme code refactoring to defer unused apps and optimize asset delivery, boosting general pagespeed metrics and reducing render blocking.

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Frontend Tuning HTML5 / WebP filters

Chelsea Peers

Restructured image delivery layouts to utilize next-gen formatting, drastically cutting down home page image payload sizes without reducing resolution.

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Custom Features Dev Shopify APIs / JSON

Jewells

Integrated custom Shopify app features and configured AJAX cart states to enable smooth, real-time product selections and faster checkout flows.

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Custom Engineering Tools

React NodeJS Gemini API

ShopifyAI Optimizer

An automated storefront performance diagnostics dashboard. It scans theme templates, detects rendering bottlenecks (such as unused JS or large images), and queries Google Gemini AI to generate optimized Liquid syntax replacements.

React Express Pixelmatch

ShipSync QA

A layout visual regression suite designed for e-commerce CI/CD. It receives webhook notifications on code pushes, captures automated screenshots of key templates, and compares them using pixel-matching to detect visual anomalies.

Java Enterprise & Real-Time Applications

Spring Boot React H2 DB

SnapLink URL Shortener

A high-performance URL shortening and analytics platform. Automatically encodes long URLs into mathematically guaranteed 6-character short codes using a Base62 sequence mapping. Tracks accurate real-time click metrics using HTTP 302 temporary redirects and handles expiration TTL policies.

Spring Boot WebSockets Monaco Editor

SyncShare Collaboration

A real-time workspace for developer collaboration. Integrates the Monaco Editor engine to support synchronized keystroke editing, room chat, and UUID-based secure room access. Built with raw Java WebSockets for state synchronization and supports drag-and-drop file sharing up to 50MB.

Live Engineering Playground

Interact with miniature local simulations of the performance and visual regression pipelines.

Liquid Theme Audit Simulator

Input a store domain to scan for render-blocking elements and request AI optimizations.

54 Performance

88 Accessibility

72 Best Practices

Opportunity: Serve Hero Image with High Fetchpriority

The primary banner element delays Largest Contentful Paint (LCP) by 1.8s.

Suboptimal Liquid

<div class="hero">
  <img src="{{ section.settings.img | img_url: '2000x' }}">
</div>

AI Refactored Liquid

<link rel="preload" as="image" href="{{ section.settings.img | img_url: '1200x' }}" fetchpriority="high">
<img src="{{ section.settings.img | img_url: '1200x' }}" fetchpriority="high" loading="eager">

CI/CD Visual Regression Simulator

Trigger a mock GitHub Actions layout check. Use the slider to drag and inspect pixel diff highlights.

Get In Touch

Let's discuss Shopify storefront optimizations, testing pipelines, or engineering opportunities.

Contact Information

Feel free to reach out directly through email or social media channels.

sujanmaji948@gmail.com

Kolkata, India

View Resume (Google Drive)