
Kamrul Hasan
Verified Expert in Engineering
WordPress and Shopify Developer
Dhaka, Dhaka Division, Bangladesh
Toptal member since January 21, 2021
Kamrul is a senior WordPress and Shopify developer with over ten years of experience building custom themes, plugins, Shopify apps, and scalable eCommerce solutions. He has delivered 840+ high-performing websites for global clients across various industries. His expertise includes performance optimization, SEO, security, and API integrations. Kamrul focuses on clean architecture, clear communication, and long-term maintainable solutions.
Portfolio
Experience
- WordPress - 10 years
- CSS3 - 10 years
- WooCommerce - 10 years
- PHP - 10 years
- Elementor - 8 years
- Shopify - 7 years
- Craft CMS - 5 years
- SaaS - 4 years
Preferred Environment
Git, OS X, XAMPP, Figma, PHP, Shopify, Visual Studio Code (VS Code), Docker, Slack, Monday.com
The most amazing...
...thing I've built was a site that sells eclipse protection glasses, ranked number one for the keyword eclipse and had over 30 million visitors monthly.
Work Experience
Lead Developer | Shopify, WordPress, and WooCommerce
Themefic
- Developed several sites with Shopify and Shopify Plus.
- Developed a booking plugin with WooCommerce compatibility.
- Converted PSD, XD, and Figma files into responsive Shopify and WordPress themes.
- Customized Shopify and WordPress themes and plugins according to the client's requirements.
- Maintained and developed the company's themes and plugins.
- Led a team of 11 people who developed amazing plugins for the agency.
WordPress Developer
The Informed Citizen Inc.
- Developed a WordPress Plugin that connects a WordPress website with the news publishers' portal, such as ABC News, CBS News, etc.
- Developed a functionality for real-time updating of the news articles from the publisher's portal, along with all the information.
- Had over 20,000 daily visitors after launching, and also synced over 4,000+ articles from various publishers.
WordPress Developer
Perfect Pet Foods PTY LTD
- Redesigned the website from a Figma design provided by the client.
- Connected the website products with a third-party selling platform with REST API.
- Turned the website fully responsive on all devices.
Craft CMS Expert Developer
Astriata LLC
- Developed a website on Craft CMS from the Figma design.
- Contributed to the team in terms of development of the custom modules.
- Developed a map-based system to show the associated members according to the user's region.
Odoo Developer for Website Setup and Customization
Kreiner Natural Soaps LLC
- Designed and developed a Shopify store in Shopify.
- Created an app which connects shopify with Odoo platforms and sync product data and order data between two platforms.
- Connected with hubspot and created a realtime sync with Shopify orders and hubspot tickets.
WordPress Developer
Rubyplay Limited
- Developed the website from scratch according to the Figma design provided by the client.
- Built a search functionality to search the games from the database with the autocomplete option.
- Maped a database for the game listings and implemented multilingual functionality.
WordPress Developer
Cropsie BV
- Redeveloped the whole website using the WordPress platform with all the exciting features.
- Implemented multivendor functionality with automatic commission split among the vendors with Stripe Express.
- Connected 3rd-party inventory application to maintain product inventory between the store and warehouse.
Shopify Developer (via Toptal)
Rubyplay Limited
- Developed the website with Shopify, which is 100% pixel perfect for the design and mobile responsive.
- Architected backend logic according to the design.
- Developed a custom search functionality that allows users to search for games on the back end.
- Added a multi-language option in five languages with a search option.
WordPress Developer
SAFARI SIGHTS LLC
- Built a flight booking plugin that connects the website with a travel provider via a REST API.
- Developed a hotel booking plugin using Hotelbeds API.
- Optimized the website and did various bug fixes through the website.
WordPress and WooCommerce Developer
Nord Acoustics Ltd
- Developed the website according to the client's expectations.
- Redesigned the website from scratch and revamped the user experience of the website.
- Integrated payment gateways and integrated a 3rd-party API-based shipping process in the website.
Shopify Developer
Awake US INC
- Developed pages and sections according to the design provided by the client in Figma.
- Customized inventory app to maintain inventory between cross-border warehouses.
- Fixed existing functionality and created API-based functionality for CRM.
CMS Expert
Carewell Family, Inc
- Implemented designs into functional web pages and made them responsive for all devices.
- Performed regular maintenance of their BigCommerce store.
- Developed sections according to the Figma design for BigCommerce store pages.
- Created mobile-first landing pages for marketing purposes with separate desktop versions.
- Developed A/B testing for each page and completed and analyzed the results.
Webflow and Shopify Expert
HEYZOOMA
- Developed a Shopify theme that matched the design.
- Built custom sections and widgets that are in line with the website.
- Created a subscription-based selling option using Shopify.
Shopify Front-end Developer
Riess Group
- Developed Shopify Plus stores from designs based on the client's requirements.
- Fixed various bugs and added new features to the store.
- Developed stores for several Forbes 500 companies and multi-billion company stores.
Web Developer
Junto
- Developed WordPress websites from designs and mockups.
- Tracked and fixed bugs in the existing WordPress websites.
- Added custom sections by editing themes and plugins.
Senior WordPress Developer
SEOQuotes
- Converted the designs to functional responsive websites.
- Maintained the existing websites of the company.
- Handled SEO for the web pages and maintained site security.
Senior Web Developer
PSDtoWPService.com
- Converted the clients' designs into functional, responsive WordPress websites.
- Developed Shopify websites according to client requirements.
- Communicated with the customers and solved their after-sales problems.
Web Developer
WPDIVINE Technologies
- Maintained company websites and regularly updated them.
- Converted PSD designs into responsive HTML templates.
- Installed WordPress themes and customized them according to client requirements.
Experience
Shopify Website Development for a Fashion Brand
https://migolondrina.com/As the Shopify developer on this project, I was responsible for designing and developing the full eCommerce experience for Mi Golondrina's online store.
• Theme Customization — Customized the Shopify theme to reflect the brand's artisan aesthetic, using rich visuals, elegant typography, and warm color palettes.
• Store Setup and Configuration — Set up product collections, metafields, filters, and navigation to create a smooth and intuitive shopping journey.
• Performance Optimization — Improved page load speed through image optimization, lazy loading, and clean Liquid code practices.
• Responsive Design — Ensured a fully responsive layout across mobile, tablet, and desktop devices.
• App Integration — Integrated third-party Shopify apps for reviews, shipping, and marketing automation.
• Launch and Support — Managed the go-live process and provided post-launch support to ensure a seamless store experience.
WordPress Website Development for A Car Wash Company
https://www.superstarcarwashaz.comRole and Contributions:
As lead WordPress developer, I handled the full Figma-to-WordPress conversion and built all custom functionality:
• Figma to WordPress — Pixel-perfect theme conversion from Figma design
• ACF Flexible Layouts — Modular, reusable page sections for easy content management.
• Location-Based Store Finder — Geolocation feature showing nearest car wash centers by distance, address, and directions.
• Interactive Store Locator — Filterable map and list view with radius filtering across all states.
• Responsive Design — Fully optimized across all devices.
Impact:
Making it effortless for customers to find their nearest Super Star Car Wash anytime, anywhere.
Shopify eCommerce Website for a Fitness Brand
https://www.topfitness.com/Role and Contributions:
As lead Shopify developer, I delivered a fully customized, high-performance eCommerce experience:
• Heavy Theme Customization — Deeply customized the Shopify theme with custom sections, UI components, and brand-aligned styling.
• Geolocation-Based Homepage — Built dynamic homepage functionality that detects visitor location and displays region-specific content, stores, and promotions.
• Third-Party Product Sync — Integrated and configured a third-party product sync app to keep inventory, pricing, and product data updated automatically.
• Multi-Location Store Pages — Developed custom store finder pages per state.
• Responsive Design — Fully optimized across all devices.
Impact:
Delivering a smart, location-aware shopping experience for fitness enthusiasts across the United States.
RubyPlay — Gaming Website Development Using WordPress
https://rubyplay.com/Role and Contributions:
As lead WordPress developer, I built and delivered the full web experience for RubyPlay's game-rich platform:
• AJAX-Based Game Search — Built a real-time, no-page-reload game search system allowing visitors to instantly filter and find games by title, theme, or series
• Game Portfolio Management — Developed custom post types and taxonomies to manage a large library of slot games with themes and series
• Multilingual Support — Integrated WPML for multi-language support across 8+ languages
• Responsive Design — Fully optimized layout across all screen sizes
• Performance Optimization — Fast load times for a media-heavy gaming website
Impact:
Delivering a smooth, lightning-fast game discovery experience for players and operators worldwide.
Nonprofit Web Platform Development — Website & LMS Integration
https://www.iamheart.orgRole and Contributions:
As lead WordPress developer, I designed and delivered the complete technical solution:
• Custom Course Calendar — Dynamic calendar filtering courses by date and location.
• Donation-Based Pricing — Flexible pricing model aligned with nonprofit accessibility goals.
• LMS Integration — Full LMS setup for beginner to advanced courses.
• Auth0 Authentication — Secure login with SSO &andsocial sign-in support.
• Location Filtering — Browse courses by region for global students.
• Responsive Design — Fully optimized across all devices.
Impact:
Empowering a global meditation community through secure, accessible, and donation-friendly learning.
Triple-A — Fintech WordPress Website Development
https://triple-a.ioRole and Contributions:
As lead WordPress developer, I built the full Elementor-powered website and developed custom fintech functionality:
• Elementor Page Building — Designed and developed all pages using Elementor with custom widgets and pixel-perfect layouts.
• Currency Converter — Built a custom real-time currency converter tool with live exchange rate integration for crypto and fiat currencies.
• Custom Widgets — Developed custom Elementor widgets to handle dynamic fintech content and pricing displays.
• Performance and Security — Optimized for speed and ensured enterprise-grade security standards suitable for a licensed financial institution.
• Responsive Design — Fully optimized across all devices.
Impact:
Empowering a globally licensed fintech brand with a fast, professional web presence and real-time currency tools.
WooCommerce-based Booking Website for Peruways | Official Machu Tickets Provider
I created a functionality where admin can showcase various types of tour packages and visitors can buy them. I also created the eCommerce platform with WooCommerce.
WordPress-based Travel Booking Plugin Development
https://wordpress.org/plugins/tourfic/Role and Contributions:
As lead developer, I architected the core plugin and led the development team across all major versions:
• React Front-end Dashboard — Built a fully dynamic React-powered dashboard for vendors and customers
• Multi-module Booking System — Developed hotel, tour, car rental, and apartment booking modules
• Multi-vendor Marketplace — Vendor system with dedicated listings and booking management
• WooCommerce Integration — Deep payment and order management integration
• API Integrations — Booking.com and TravelPayouts affiliate program integrations
Impact:
Leading development of one of WordPress's most comprehensive travel booking plugins, used by businesses worldwide.
Property Listing Website for a Care Home Company
https://www.bondcare.co.uk/MY RESPONSIBILITIES
• Customized various pages on the new website.
• Implemented functions to calculate distances from postcodes using Google Maps API.
• Worked heavily on front-end development, ensuring compatibility with the WP Residence theme and Elementor builder.
• Collaborated with the client to refine requirements and deliver solutions.
• Ensured the website's new functionalities were thoroughly tested and operational.
Eclipse2017.org, Inc. | For-profit Company
https://eclipse2024.org/Role and Contributions
As a developer on this high-traffic custom PHP project, I delivered key features without relying on any CMS:
• Multi-Language Support — Built a custom PHP-based multilingual system from scratch supporting English, Spanish, French, and Portuguese — no CMS or plugin required.
• Eclipse Simulator — Worked on the interactive eclipse simulator showing real-time eclipse visuals for any location across North America.
• High-Traffic Performance — Developed and optimized the site to handle 50M+ unique daily visitors reliably.
• Custom PHP Architecture — Built modular, maintainable PHP components without CMS dependency.
• Responsive Design — Fully optimized across all devices.
Impact:
Helping millions of people across North America safely plan and experience the 2024 Total Solar Eclipse.
Webflow Platform: Agency Website
https://www.liberte.com.sg/Webflow Website Built from Figma Designs
https://isabels-fresh-site-c30ccb.webflow.io/Education
Master's Degree in Information and Communication Technology
Bangladesh University of Professionals - Dhaka, Bangladesh
Bachelor's Degree in Computer Science
American International University of Bangladesh - Dhaka, Bangladesh
Certifications
WebFlow Template and App Development
Ostad Inc.
Shopify Developer
Shopify Partners
WordPress Plugin Developer
Wp.org
WordPress Certifications
American International University Bangladesh
Skills
Libraries/APIs
jQuery, Liquid, WordPress API, jQuery UI, Shopify API, BuddyPress, WooCommerce API, React, WordPress REST API, Stripe API, Vue, REST APIs, Node.js, Stripe, Amazon API, Google Maps, Google Location API, HubSpot API, Custom APIs, Auth0 API
Tools
Git, Advanced Custom Fields (ACF), Figma, Shopify Plus, Gutenberg Editor, Webpack, Google Analytics, Zapier, Adobe Experience Design (XD), WPML, WPBakery, ACF PRO, Meta Box, Multiple Listing Services (MLS), LearnDash, Mailchimp, Front-end Build Tools, Amelia, ShipStation, ChatGPT, Odoo, EduBlink, Sublime Text, InVision, Photoshop 7, Wix, Make (formerly Integromat), Slack, Figma to Webflow, Auth0
Languages
PHP, HTML5, JavaScript, CSS, HTML, CSS3, Sass, Liquid Template, PHP 7, SQL, Shopify Liquid, C++, C#.NET, CMS Script, JavaScript 6, Python
Frameworks
Divi, Tailwind CSS, Flight, JSON Web Tokens (JWT), Laravel, Next.js
Paradigms
Responsive Web Design (RWD), Responsive, BEM, Mobile Development, UI Design, UX Design, Visual Design, Object-oriented Programming (OOP), REST, Search Engine Optimization (SEO), On-page SEO, Automation, Conversion Rate Optimization (CRO), Database Design, Agile, App Development
Platforms
WordPress, XAMPP, OS X, Shopify, WooCommerce, WordPress Theme Design, Webflow, Webflow CMS, HubSpot, Web, cPanel, Amazon Web Services (AWS), LAMP, Craft CMS, Klaviyo, BigCommerce, DigitalOcean, Twilio, VWO, Azure, Contentful, Zoho CRM, Salesforce, Visual Studio Code (VS Code), Docker
Storage
MySQL, WP Engine, DB, Database Management
Industry Expertise
Web Design
Other
PSD to Shopify, PSD to WordPress, WordPress Plugins, WordPress Themes, eCommerce, Elementor, Sketch to WordPress, Responsive Design, User Interface (UI), Shopify Design, Figma to Shopify, Shopify Theme, Wireframe to Product, Web Development, WordPress Design, Websites, Shopify Customizations, Web UI, Learning Management Systems (LMS), Shopify Payments, Custom Post Types, Gravity Forms, Landing Pages, User Experience (UX), Themes, WooCommerce Subscriptions 2, Pixel Perfect, Communication, CSS3 Animation, Animation, Design, Branding, HTML to WordPress, GoDaddy, Google Tag Manager, FTP, Hotels & Lodging, Multilingual Websites, Leadership, Technical Leadership, Accessibility, Plugins, Video Streaming, Content Management Systems (CMS), Dashboards, Healthcare IT, Front-end Development, Page Speed Optimization, Fraud Prevention, Customer Portals, Oxygen, Full-stack Development, ADA Compliance, DocuSign, Forms, Workflow Automation & System Integration, Bricks, PSD, WCAG 2, Online Payments, CRM APIs, Inventory Management, Booking Systems, Subscriptions, eCommerce UI, Widgets, Single Sign-on (SSO), WordPress Customization, Privacy, Security, WordPress Multisite, A/B Testing, Custom Shopify Apps, WordPress to Shopify, Architecture, CMS, WordPress Multinetwork, Domain DNS Setup, WordPress Theme Customization, WordPress SEO, Web Hosting, Data Migration, Payment APIs, Dropshipping, Shopify SEO, Affiliate Marketing, Backup & Recovery, Vimeo, Code Auditing, Network Solutions, Cloudflare, Ajax, Plugin Development, SaaS, Legal Technology (Legaltech), APIs, Restrict Content Pro, Custom Grouping, Back-end, Gravity, QA Testing, SEO Tools, Integration, Rank Math, Yoast SEO, Data Scraping, Web Scraping, Scripting, Performance Optimization, Variant Configuration, AI Integration, AI Tools, 3D Graphics, Computer Networking, Ethical Hacking, Data Communication, Cloud Computing, Visual Composer, InVision Studio, Apps, Website CMS, Website QA, Front-end, Builder, Zoho, ActiveCampaign, Payment Gateways, Booking, API Integration, Sharetribe, Dokan, Customer Relationship Management (CRM), Figma to WordPress, WordPress Page Builder, Google Analytics 4 (GA4), Customer Service, WP Residence Theme, Real Estate, Geolocation, Google Custom Search, ODK, HubSpot CRM, Email Templates, Monday.com, WordPress to Webflow, Webflow App, Custom Plugins, Custom CMS Development, Webhooks, CRM, GraphQL APIs, RSS Feeds, Affiliate Tracking, OpenAI, Open-source LLMs
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