Sabbir is available for hire
Hire SabbirSabbir Hasan
Verified Expert in Engineering
WordPress Developer
Tallinn, Estonia
Toptal member since March 23, 2021
Bio
Sabbir is a Zend Certified PHP developer with solid PHP, OOP PHP, JavaScript, jQuery, and WordPress expertise. He has worked as a full-stack WordPress developer for over 11 years. He has completed over 300 projects with 100% client satisfaction. Besides WordPress, Sabbir has extensive knowledge of Shopify development. With his demonstrated project history, knowledge of web technologies, and WordPress expertise, Sabbir can choose and deliver the best tech stack for your project.
Portfolio
Online Freelance Agency
Bootstrap, CSS, Git, HTML, JavaScript, jQuery, PHP, MySQL, Vue, WordPress...
Floof LLC
Shopify, Shopify Liquid, Theme Customization, Performance Optimization...
MARCHE ROYALE PARIS
Shopify, Shopify Liquid, Shopify Theme, UI Animation, eCommerce, JavaScript...
Experience
- WordPress - 12 years
- Shopify Customizations - 6 years
- Shopify Liquid - 6 years
- Shopify - 6 years
- Website Optimization - 5 years
- AI Content Creation - 2 years
- n8n - 2 years
- airops - 1 year
Work Experience
Full-stack Web Developer
2015 - PRESENT
Online Freelance Agency
- Worked on more than 180 projects with over 3,000 working hours, helping clients achieve their goals.
- Renovated and revamped websites which improved the overall performance and technical SEO.
- Developed WordPress themes and plugins from scratch; also extended existing plugins and themes.
Technologies: Bootstrap, CSS, Git, HTML, JavaScript, jQuery, PHP, MySQL, Vue, WordPress, Responsive, WooCommerce, HTML5, WordPress Optimization, GTmetrix, Content Delivery Networks (CDN), Amazon Web Services (AWS), Image Compression, Video Compression, Website Optimization, Avada, WP Super Cache, WPML, Figma, CSS3, Shopify, Divi, Zeplin, SVG, Search Engine Optimization (SEO), Web, Web Development, Liquid, Liquid Template, Google Tag Manager, Google Analytics, Front-end, Advanced Custom Fields (ACF), ACF PRO, Web Accessibility, Node.js, Web Design, SQL, Web UI Design, Web UX Design, WordPress Design, eCommerce, User Experience (UX), PayPal API, Alpine.js, WordPress REST API, RSS Feeds, Shopify Theme, PSD to Shopify, Shopify Customizations, Shopify Design, LEMP, Gravity Forms, Web Hosting, Dedicated Web Hosting, Web Hosting & Domain Setup, Website Maintenance, Sketch, Squarespace, Shopify Plus, Gutenberg Editor, Adobe Experience Design (XD), CSS3 Animation, Webpack, Shopify Payments, Shopify Liquid, Shopify API, Figma to WordPress, Cloudflare, Rank Math, Google Search Console, Figma to Shopify, Ultimate Membership Pro, Artificial Intelligence (AI), Intelligent Content Processing (ICP), n8n, Site Speed Optimization, Core Web Vitals, CI/CD Pipelines, Technical SEO, Membership Sites
Senior Shopify Theme Developer
2025 - 2026
Floof LLC
- Worked on the existing Shopify template to fix bugs and implement new features, resulting in a much better user experience.
- Debugged JavaScript-related issues using Chrome DevTools with breakpoints and added a patch.
- Implemented custom gallery logic for variants in PDP to ensure a smooth UI transition while switching between variants.
- Added the ability to add common global variant images and their placement using metaobjects and liquid templating.
Technologies: Shopify, Shopify Liquid, Theme Customization, Performance Optimization, JavaScript, Vanilla JS, HTML, Shopify Theme, Core Web Vitals, Technical SEO
Shopify Developer
2025 - 2026
MARCHE ROYALE PARIS
- Revamped and migrated from the old WordPress website to a clean and high-performance Shopify storefront, which will convert into multifold user engagement.
- Developed the template from scratch using a Figma UI design reference. Added micro-interaction animations and interactive UI components.
- Migrated products from the old WooCommerce store to Shopify and launched the new storefront.
Technologies: Shopify, Shopify Liquid, Shopify Theme, UI Animation, eCommerce, JavaScript, Responsive UI, Web Development, Site Speed Optimization, Core Web Vitals, CI/CD Pipelines, Technical SEO
Shopify Developer
2024 - 2025
Drawbridge Health, Inc
- Made the existing website mobile-friendly and easily accessible.
- Scaffolded an entirely new version of the website back end using Next.js, Shadcn/ui, and Tailwind CSS.
- Developed custom UI components and a widget system to improve the experience for logged-in users.
Technologies: Shopify, JavaScript, Node.js, TypeScript, AWS IoT, Shopify Plus, Liquid, Shopify Liquid, Salesforce, React, Next.js, Tailwind CSS, Shadcn, Google Search Console, Figma to Shopify, CI/CD Pipelines, Technical SEO
eCommerce Developer
2022 - 2022
TUSHY
- Developed a new template from scratch, collaborating with the UI/UX designer. Improved the overall user experience by a significant margin, causing a huge increment in sales.
- Created a custom Shopify app for internal use to resolve the gap between customer support and customers.
- Implemented custom discount logic using the Shopify Script Editor app and custom Ruby scripting.
Technologies: Shopify, JavaScript, HTML, CSS, A/B Testing, Site Speed Optimization, Google Search Console, Figma to Shopify, Core Web Vitals, CI/CD Pipelines, Technical SEO
Elementor WordPress Developer
2022 - 2022
TruConnect, LLC.
- Improved the overall layout of the website to make it more uniform.
- Created multiple design templates following Figma design. The templates included a custom Megamenu with a different design for desktop and mobile.
- Developed a custom plugin as an addon pack of Elementor with multiple custom addons. This added a custom functionality to the website.
Technologies: WordPress, CSS, WordPress API, Elementor, HTML, JavaScript, PHP, WordPress Design, WordPress Optimization, User Experience (UX), Web Hosting & Domain Setup, CSS3 Animation, eCommerce, Figma to WordPress, Cloudflare, Google Search Console, WooCommerce, Site Speed Optimization, Technical SEO
Senior Software Engineer
2021 - 2022
ThemeBucket
- Developed and revamped a user-facing WordPress plugin with over 100,000 active installations.
- Used Git for version control of the codebase, Slack for inter-team communication, and Trello for tracking tasks and issues.
- Created new widgets and introduced a new plugin feature that helped gain new users.
Technologies: PHP 7, WordPress, WordPress API, WordPress Plugins, jQuery Plugins, Elementor, Responsive, Yarn, HTML5, WPML, CSS3, SVG, Google Tag Manager, Google Analytics, Front-end, Information Architecture (IA), WordPress Design, User Experience (UX), LEMP, DevOps, CSS3 Animation, Webpack, eCommerce, Shopify API, Shopify Plus, Shopify Customizations, Shopify Design, Figma to WordPress, Cloudflare, Rank Math, Google Search Console, Ultimate Membership Pro, MySQL, WooCommerce, Site Speed Optimization, Core Web Vitals, CI/CD Pipelines, Technical SEO, Membership Sites
Software Engineer
2017 - 2020
Hellotask
- Developed an initial back end using Laravel and front end with WordPress. There was an API to communicate between the front and back end. This helped to run the entire platform smoothly.
- Tracked issues and goals using Jira and team communication using Slack.
- Renovated the system design and user-facing website resulting in 400 new user engagements.
Technologies: Bootstrap, PHP, Laravel, APIs, WordPress, Responsive, SVG, Web Development, Web, Web Design, Information Architecture (IA), SQL, Web UI Design, WordPress REST API, LEMP, Linux, DevOps, Dedicated Web Hosting, Web Hosting & Domain Setup, Adobe Experience Design (XD), CSS3 Animation, Webpack, Shopify, Shopify API, Shopify Plus, Shopify Customizations, Shopify Design, Cloudflare, Rank Math, Google Search Console, MySQL, WooCommerce, Site Speed Optimization, Core Web Vitals, CI/CD Pipelines, Technical SEO, Membership Sites
WordPress Developer
2011 - 2015
Self-employed
- Developed around 50 WordPress websites from scratch with handcrafted themes, managed them, and provided additional support.
- Managed the code with Git and used Trello for progress checking and bug reporting.
- Developed a REST API for websites. It enabled the ability to easily create mobile applications, increasing the number of platform-specific users.
Technologies: Bootstrap, CSS, Git, JavaScript, WordPress, HTML, WordPress Plugins, Responsive, HTML5, WordPress Optimization, GTmetrix, Content Delivery Networks (CDN), Amazon Web Services (AWS), Image Compression, Video Compression, Website Optimization, Avada, WP Super Cache, WPML, Figma, CSS3, Shopify, Divi, Zeplin, SVG, Web Development, Web, Google Tag Manager, Google Analytics, Front-end, Advanced Custom Fields (ACF), ACF PRO, Web Design, Web UI Design, Web UX Design, WordPress Design, User Experience (UX), PayPal API, Alpine.js, WordPress REST API, DevOps, Web Hosting, Dedicated Web Hosting, Web Hosting & Domain Setup, Website Maintenance, Gutenberg Editor, Adobe Experience Design (XD), CSS3 Animation, Webpack, eCommerce, Figma to WordPress, Cloudflare, Rank Math, Google Search Console, MySQL, Artificial Intelligence (AI), WooCommerce, Site Speed Optimization, Core Web Vitals, CI/CD Pipelines, Technical SEO, Membership Sites
Project History
A Dental Website
A WordPress-based website for dentists based on a design (PSD document).
I was responsible for converting the design into a WordPress theme and transforming it into a functional dynamic website. My goal was to use fewer plugins and specifically develop everything for this website. This helped to boost the SEO score and overall website performance. I also used ACF as a theme builder with custom-crafted content blocks. I also made reusable content blocks and made them dynamic with ACF.
I was responsible for converting the design into a WordPress theme and transforming it into a functional dynamic website. My goal was to use fewer plugins and specifically develop everything for this website. This helped to boost the SEO score and overall website performance. I also used ACF as a theme builder with custom-crafted content blocks. I also made reusable content blocks and made them dynamic with ACF.
Portfolio for a Wedding Photographer
https://www.garynunn.co.uk/A WordPress and Pro Photo-based website.
I was responsible for redoing the website from scratch as well as developing some core functionalities. I've also organized the website contents and made sure no technical SEO issue was left.
I was responsible for redoing the website from scratch as well as developing some core functionalities. I've also organized the website contents and made sure no technical SEO issue was left.
Company Portfolio for Heathcare Software Solutions
https://wellsky.com/A WordPress-based company portfolio.
I was responsible for developing the front end based on an existing theme and templates. I also needed to make sure the brand identity was fully present and visible within the website.
I was responsible for developing the front end based on an existing theme and templates. I also needed to make sure the brand identity was fully present and visible within the website.
Website for an Animal Welfare Nonprofit
Dogs by Debin is an organization focused on dog welfare and facilitates dog adoptions.
I was approached to redo the entire website based on their brand and their ideas. I developed the theme from scratch and wrote a plugin to handle internal functionalities.
I was approached to redo the entire website based on their brand and their ideas. I developed the theme from scratch and wrote a plugin to handle internal functionalities.
An Add-on Pack for Elementor Page Builder
https://happyaddons.com/At a previous company, I developed a WordPress plugin called "Happy Add-ons for Elementor" for Elementor Page Builder. The free version has more than 100,000 active installations resulting in a huge project. I was responsible for constructing the plugin core as well as developing widget blocks.
Crypto Website
https://mozaic.finance/A WordPress-based website for a cryptocurrency token company that shows everything related to the token.
For data management, I've used ACF PRO and some custom coding to create a component-based approach to the development.
The back end can fully manage the visible contents on the front end. Advanced-level CSS animation is used for the website.
For data management, I've used ACF PRO and some custom coding to create a component-based approach to the development.
The back end can fully manage the visible contents on the front end. Advanced-level CSS animation is used for the website.
TaxHouse
TaxHouse is a web platform to manage and submit tax returns with ease. The front-end website is WordPress based, while the back-end portal is a Laravel-based web application with a Vue.js front end. The whole system includes many features like bookkeeping, automatic return generation, summary, history, and many more.
Los York Portfolio
https://losyork.tvI created a company portfolio for a creative agency that works with big tech and celebrities and has its own label.
A custom-developed WordPress theme was used. The theme was developed based on provided design and was made sure to perform.
A custom-developed WordPress theme was used. The theme was developed based on provided design and was made sure to perform.
Los York Films
https://losyorkfilms.com/Los York Films is a creative production company. The website was built on WordPress with a custom-developed theme. For data management, ACF is being used. The theme was properly optimized to perform and load super fast.
Senior Shopify Developer
A Shopify store rebranding project where I helped to migrate to a new design and branding using Liquid, Alpine.js, and webpack-based asset bundling. For this project, GitHub-based CI/CD was used. I was responsible for building many complex features as well as implementing new designs from Figma.
Education
2016 - 2020
Bachelor's Degree in Geography
Shahjalal University of Science and Technology - Sylhet, Bangladesh
Certifications
DECEMBER 2025 - DECEMBER 2028
AWS Certified Cloud Practitioner
Amazon Web Services (AWS)
DECEMBER 2020 - PRESENT
Zend Certified PHP Engineer
Zend
Skills
Libraries/APIs
WordPress REST API, Liquid, PayPal API, Shopify API, jQuery, Node.js, Vue, WordPress API, jQuery Plugins, React
Tools
WPML, Figma, Zeplin, Google Analytics, Shopify Plus, Adobe Experience Design (XD), GitHub, Advanced Custom Fields (ACF), ACF PRO, Sketch, Git, Gutenberg Editor, Webpack, n8n, Gulp, Composer, GIS, Slack, AWS Command Line Interface (CLI), Shadcn, Intelligent Content Processing (ICP)
Languages
PHP, SCSS, HTML, PHP 7, JavaScript, CSS, HTML5, CSS3, Liquid Template, Shopify Liquid, SQL, Sass, TypeScript
Frameworks
Bootstrap, Yarn, Divi, Tailwind CSS, Alpine.js, Laravel, Next.js, Vanilla JS
Paradigms
Responsive, Web UI Design, Web UX Design, Search Engine Optimization (SEO), DevOps
Platforms
WordPress, WooCommerce, Shopify, Web, Amazon Web Services (AWS), LEMP, Linux, AWS IoT, Salesforce
Storage
MySQL, RDBMS
Industry Expertise
Web Design
Other
WordPress Plugins, Elementor, WordPress Themes, WordPress Optimization, GTmetrix, Content Delivery Networks (CDN), Website Optimization, Avada, WP Super Cache, RSS Feeds, Web Development, Google Tag Manager, Front-end, CSS3 Animation, Web Accessibility, Shopify Theme, Shopify Customizations, Shopify Design, Gravity Forms, Web Hosting, Dedicated Web Hosting, Web Hosting & Domain Setup, Website Maintenance, WordPress Design, eCommerce, User Experience (UX), Dashboards, Web Dashboards, Admin Panels, Shopify Payments, Site Speed Optimization, Figma to WordPress, Cloudflare, Rank Math, Google Search Console, Figma to Shopify, Ultimate Membership Pro, airops, Core Web Vitals, CI/CD Pipelines, Technical SEO, Image Compression, Video Compression, SVG, PSD to Shopify, Information Architecture (IA), Squarespace, Artificial Intelligence (AI), AI Content Creation, Membership Sites, APIs, Programming, Tax Systems, A/B Testing, UI Animation, Responsive UI, Theme Customization, Performance Optimization, airOps
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