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Gan Eng Chin
Verified Expert in Engineering
Software Developer
Kuala Lumpur Federal Territory of Kuala Lumpur, Malaysia
Toptal member since May 18, 2020
Bio
Gan had his roots in software development when he started programming and building his own mathematical game with VB6 at the age of 16. Today, with more than 12 years of professional web development experience working with people around the world in both large corporate and small startup environments, he continues to go strong in using his passion, business sense, people, and technical skills to solve business problems.
Portfolio
Automattic
React, JavaScript, TypeScript, WordPress, PHP, Redux, CSS, D3.js, SQL...
Yoozrr Technologies
Amazon Web Services (AWS), Google Cloud Platform (GCP), Node.js, GraphQL...
Freelance
Node.js, Ant Design, Material Design, D3.js, GraphQL, JavaScript, TypeScript...
Experience
- CSS - 12 years
- JavaScript - 12 years
- TypeScript - 7 years
- React - 7 years
- Google Cloud Platform (GCP) - 3 years
- Amazon Web Services (AWS) - 3 years
- GraphQL - 3 years
- Progressive Web Applications (PWAs) - 3 years
Preferred Environment
Git, Slack, Visual Studio Code (VS Code), Cursor AI
The most amazing...
...set of new features I helped develop was for a cross channel marketing platform that made the project a market leader and brought us million-dollar revenues.
Work Experience
Senior Software Engineer
2020 - 2025
Automattic
- Led the development and maintenance of multichannel marketing and analytics features in the open-source WooCommerce plugin, which has over 8 million active installations.
- Led the development and maintenance of WooCommerce marketing extensions—Google, Facebook, Pinterest for WooCommerce plugins—which have over 1.7 million active installations and are major revenue sources for WooCommerce.
- Migrated WooCommerce Connect Server middleware used by WooCommerce extensions (with millions of active installations) from an unsupported legacy PHP framework to a Node.js application.
- Collaborated with cross-functional teams in Automattic to build the new WooCommerce Analytics plugin that leverages WordPress.com infrastructure and the new WordPress Admin design to deliver new analytics features and experience.
- Mentored and coached engineers in their skill growth in React, JavaScript, and TypeScript.
- Made contributions to open-source WordPress projects and volunteered as a speaker, emcee, and staff in WordPress events (e.g., WordCamp Asia 2025 with 2,000 attendees; WordCamp in Malaysia, Hong Kong, Nepal, Indonesia).
Technologies: React, JavaScript, TypeScript, WordPress, PHP, Redux, CSS, D3.js, SQL, Cursor AI, Visual Studio Code (VS Code), GitHub Copilot Chat, WooCommerce, Front-end, APIs, Data, Data Visualization
Senior Software Engineer
2018 - 2020
Yoozrr Technologies
- Developed a B2B web-based logistics platform that enables businesses to transform manual paper-based processes into online digital workflows.
- Developed a React Native mobile app used by truck drivers to view, track, and update their daily operations that integrated with the main logistics platform.
- Developed a gate system progressive web app that is used by guards at the logistics warehouses to view and update operations.
- Mentored and guided developers in best practices, coding styles, and code reviews.
Technologies: Amazon Web Services (AWS), Google Cloud Platform (GCP), Node.js, GraphQL, TypeScript, JavaScript, React, Front-end, APIs, Data, Data Visualization
Software Engineer
2017 - 2020
Freelance
- Developed numerous web applications for different clients from various industries to solve their business pain points.
- Designed the solution and architecture for projects and presented to the team.
- Performed troubleshooting and bug fixing for escalated issues.
- Mentored and guided developers in best practices, coding styles, and code reviews.
Technologies: Node.js, Ant Design, Material Design, D3.js, GraphQL, JavaScript, TypeScript, Angular, React, Front-end, APIs, Data, Data Visualization
Development Team Lead
2015 - 2017
Experian CheetahMail
- Led a team of developers and QAs to develop new features and enhancements for the campaign module in the cross channel marketing platform.
- Became the market leader and differentiator with this project, which brought us client wins with million-dollar revenues each year.
- Recognized as a Challenger in the 2016 Gartner Magic Quadrant for the Digital Marketing Hubs report.
- Gathered clear project descriptions and requirements by working with the product team and clients.
- Made decisions on solution architecture and design, development, code reviews, and tool choices.
- Monitored and resolved issues post project release.
Technologies: Microsoft SQL Server, AngularJS, jQuery, JavaScript, C#, ASP.NET, Front-end, APIs, Data, Data Visualization
Senior Developer
2013 - 2015
Experian CheetahMail
- Joined the knowledge transfer program in Boston, US, and conducted training sessions with teams in Kuala Lumpur, Malaysia.
- Collaborated on projects that catered to regional market-specific needs, e.g., new campaign channels and social network integrations.
- Designed project solutions and architecture and presented them to stakeholders in development, product management, architects, and managers across various regions such as the US, France, Germany, and Japan.
- Led the BAU (Business As Usual) project team that solved high-priority production issues for our clients.
- Received a thank you letter from a client who was very satisfied with our prompt actions in BAU.
- Received four awards for my contributions and got promoted to development team lead.
Technologies: Microsoft SQL Server, AngularJS, jQuery, JavaScript, C#, ASP.NET, Front-end, APIs, Data, Data Visualization
Developer
2013 - 2013
Experian CheetahMail
- Developed high-priority internationalization and localization projects on the newly acquired cross channel marketing platform.
- Designed and developed the segmentation module to allow our clients to select the target audience accurately based on the recipient's demographic and activity data.
- Designed and developed a scheduling module that allows campaigns to be launched at the right time, with international time zone support.
- Designed and developed a data import module that allowed clients to import user data using different file formats via different transport endpoints such as FTP, together with the scheduling module.
- Developed a data export module that allowed clients to export user demographic data and activity data using segmentation and scheduling modules.
- Achieved the company's business goal of marketing the product outside of the US region, with the first one being the EMEA region.
- Won the Experian Spot Award for my contribution and got promoted to senior developer.
Technologies: Microsoft SQL Server, jQuery, JavaScript, C#, ASP.NET, Front-end, APIs, Data, Data Visualization
Developer
2011 - 2013
Experian CheetahMail France
- Joined as the first developer in the CheetahMail France platform development team in Malaysia.
- Collaborated with the French team to develop new features, enhance existing modules, and fix high-priority production issues.
- Trained and mentored new developers and QAs when they were onboarded.
- Set up development environments (e.g., system network and version control system) and defined the development workflow for the teams.
- Resolved project impediments quickly as scrum master.
- Liaised closely with teams in France as the main contact person.
Technologies: Microsoft SQL Server, jQuery, JavaScript, C#, ASP.NET, Front-end, APIs, Data, Data Visualization
Experience
WooCommerce
https://github.com/woocommerce/woocommerceThe #1 open-source eCommerce platform that powers more than 20% of all eCommerce sites in the world. I led the development and maintenance of multichannel marketing and analytics features in the open-source WooCommerce plugin, which has over 8 million active installations.
Google for WooCommerce (formerly Google Listings and Ads)
https://github.com/woocommerce/google-listings-and-adsA WooCommerce marketing extension that provides native integration with Google, offering free listings and Performance Max ads to WooCommerce merchants. I was the main engineer who led the development and maintenance of the extension, which now has more than 900,000 active installations.
Pinterest for WooCommerce
https://github.com/woocommerce/pinterest-for-woocommerceA native WooCommerce extension that allows you to market your store on Pinterest. I was one of the main engineers who oversaw the development and maintenance of the extension, which now has more than 300,000 active installations.
WordPress Gutenberg
https://github.com/WordPress/gutenberg/The Block Editor project for WordPress and beyond. I made some upstream contributions in this open-source project by logging issues and creating bug fixes and pull requests, which benefit WordPress users and developers around the world.
React Image Gallery
A mobile-first image gallery progressive web app (PWA) built with React. I created my own custom hooks that encapsulated the Flickr SDK with request cancellation. The hook signature is inspired by Apollo GraphQL hooks. Testing was done with the React Testing Library.
JavaScript Solutions for LeetCode Problems
https://github.com/ecgan/leetcodeMy JavaScript solutions for LeetCode problems contain tests with 100% code coverage using Jest. I join LeetCode contests, challenges, and forum discussions to learn, improve, and share my knowledge on algorithm and coding skills.
Leettree
This is an npm package that I built to convert the array to the binary tree and vice versa using level order traversal. It is useful for testing LeetCode solutions. It contains tests with 100% code coverage using Jest.
Education
2005 - 2008
Bachelor's Degree with Honors in Computer Science (Software Engineering)
University of Malaya - Kuala Lumpur, Malaysia
Certifications
AUGUST 2012 - AUGUST 2014
Certified Scrum Master
Scrum Alliance
Skills
Libraries/APIs
React, Node.js, D3.js, React Redux, React Testing Library, jQuery
Tools
JSX, Auth0, Slack, Git
Languages
JavaScript, HTML, CSS, GraphQL, TypeScript, C#, PHP, SQL
Frameworks
Ant Design, Redux, Cypress, Jest, Next.js, OAuth 2, Tailwind CSS, Angular, ASP.NET, AngularJS
Paradigms
REST, Continuous Integration (CI)
Platforms
WordPress, WooCommerce, Google Cloud Platform (GCP), Amazon Web Services (AWS), Visual Studio Code (VS Code)
Storage
Microsoft SQL Server
Other
Progressive Web Applications (PWAs), Styled-components, Front-end Development, Front-end, Apollo, APIs, Data, Google Material Design, OAuth, Responsive Design, Web Components, HTML5 Custom Elements, Data Visualization, Material Design, Cursor AI, GitHub Copilot Chat
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