Ezequiel is available for hire
Hire EzequielEzequiel De Simone
Verified Expert in Engineering
Full-stack Developer
Tandil, Buenos Aires Province, Argentina
Toptal member since May 6, 2013
Bio
Ezequiel is a seasoned software developer who has created software for many well-known companies, including HBO GO, WWE, Orbitz, and EA. He has also worked as a freelance project leader and developer specializing in website development. He excels in a wide range of modern technologies.
Portfolio
CareerFoundry
HTML5, CSS3, Node.js, Express.js, MongoDB, Amazon Web Services (AWS)...
OscarSoles Inc.
TypeScript, Prisma, Node.js, Python, Next.js, React, Tailwind CSS, PostgreSQL...
Sugarfina.com
Agile, Scrum, Jira, GitHub, HTML5, CSS3, ECMAScript (ES6), jQuery, jQuery UI...
Experience
- Magento - 8 years
- JavaScript - 7 years
- React - 7 years
- Magento 2 - 6 years
- Node.js - 5 years
- Functional Programming - 4 years
- Magento Community Edition - 4 years
- Amazon Web Services (AWS) - 2 years
Work Experience
Web Development Course Tutor
2019 - 2026
CareerFoundry
- Reviewed the content of each unit and corrected students' assignments for each unit.
- Taught students about the technologies they are learning.
- Taught good coding practices and helped to develop a basic page, an API in Node.js, an SPA in React and React Native, and so on.
Technologies: HTML5, CSS3, Node.js, Express.js, MongoDB, Amazon Web Services (AWS), AWS Lambda, Test-driven Development (TDD), Behavior-driven Development (BDD), React, Redux, React Native, jQuery, Firebase, GitHub, Websites, REST APIs, APIs, Jira REST API
Full-stack Developer
2025 - 2025
OscarSoles Inc.
- Built and enhanced a Next.js/React application within a modular ERP platform, delivering key features and improving UX for wholesale logistics workflows in a TypeScript monorepo.
- Designed and extended REST APIs using Hono, Prisma, and PostgreSQL, managing database migrations and building scalable, maintainable back-end services.
- Leveraged Cursor's AI Agent to accelerate feature development, debugging, refactoring, code reviews, and test generation while maintaining production-quality standards.
- Designed and maintained Cursor Rules to define project architecture, coding standards, and guardrails, improving consistency and reliability of AI-assisted development.
- Built reusable Cursor Skills for common engineering workflows, including feature implementation, repository analysis, debugging, documentation, and test generation.
- Developed structured prompting strategies to improve code generation accuracy and streamline development across front-end and back-end tasks.
- Used AI-assisted workflows to quickly understand unfamiliar codebases, implement new features, and automate repetitive engineering tasks.
- Improved system reliability by implementing authentication, writing automated tests with Vitest and Playwright, and automating development workflows using Docker and Windmill.dev.
Technologies: TypeScript, Prisma, Node.js, Python, Next.js, React, Tailwind CSS, PostgreSQL, REST APIs, API Integration, JavaScript, Vercel, prisma, Cursor AI, AI Tools, AI Agents, LLM Agents, Gemini, Turborepo, Python 3
Magento 2 Software Developer
2024 - 2025
Sugarfina.com
- Developed custom modules to interact with the process of how to show the package product.
- Modified the theme to a front-end equal to the new template.
- Set up and replicated the prod environment and created a staging environment so as not to break anything in the production environment.
- Helped integrate the site with a CRM for client management.
Technologies: Agile, Scrum, Jira, GitHub, HTML5, CSS3, ECMAScript (ES6), jQuery, jQuery UI, JavaScript, Magento 2
Software Engineer
2024 - 2025
Sellry.com
- Helped with specific issues on Magento Community 2.1. most of them about the visual aspect.
- Fixed some functionality using a plugin and add-ons integrations.
- Redesigned/refactored the look and feel on the front-end side.
- Implemented a custom API to integrate the Magento site with their systems.
- Reviewed the website's responsiveness, testing this on different mobiles and browsers.
Technologies: jQuery, JavaScript, Sass, CSS, HTML, MySQL, PHP, Apache, Linux, Magento
Senior Front End Developer
2024 - 2024
FutureWork Systems LLC
- Created and integrated Syncfusion charts into the website, ensuring accurate data handling and filtering to display the correct information in visual formats.
- Built and customized each webpage using React, JavaScript, and CSS, delivering a seamless and responsive user experience.
- Handled and filtered large datasets to ensure the correct data was displayed across charts and dashboards, improving usability and clarity for end users.
Technologies: JavaScript, HTML, CSS, WordPress, PHP, Business Intelligence (BI), Syncfusion, React
Senior Front-end Engineer
2023 - 2024
TALLER.US
- Created the Taller.us website from scratch using TypeScript, React, and a call to API.
- Made the site's design 100% accurate and ensured compatibility with all devices.
- Developed an internal tool in Angular 12 and created components and new features. Made the site responsive for small and large screens, including 5K.
Technologies: Next.js, React, TypeScript, Azure, Angular, Responsive, Responsive UI, Tailwind CSS, Bootstrap 4, Web, APIs
Magento Developer
2022 - 2023
Ammo.com
- Launched ammo.com. Redesigned the old site (ammo.net) and created new functionality.
Technologies: HTML, CSS, PHP, Magento
Front-end Software Engineer
2021 - 2023
PayPal
- Created components to support A11y accessibility. Incorporated optional chaining and replaced Lodash's library to reduce bundle sizes.
- Modified the React component to include different functionalities based on mobile native and web view apps.
- Made modifications and improvements to the flow of Paypal Pay Later and the PayPal Honey plugin.
Technologies: JavaScript 6, React, Redux, HTML5, Figma, APIs, CSS3, BrowserStack, GraphQL, Agile, TypeScript
Software Developer
2020 - 2022
Summa Solutions
- Developed the Cinsay eCommerce platform.
- Built a website.
- Migrated the K-Swiss website (http://img.kswiss.com/) from Magento 1.9.0 to 1.9.1.1.
Technologies: Mustache, Bootstrap, jQuery, Slim, SOAP, REST, PHP, Magento
Front-end Software Engineer
2018 - 2021
Reflektion
- Created the new analytics portal (https://reflektion.com/modules/#analytics) using and adapting the Highcharts library from scratch. Customized components to fit customer needs. Created everything necessary in Redux to get the components working.
- Created new components and fixed bugs in the code. In most of the cases, I connected the pieces created with Redux and a call API based on Node.js.
- Performed integration and unit tests using TDD best practices.
Technologies: Amazon Web Services (AWS), Jira, GitHub, Jenkins, Highcharts, MongoDB, Webpack, HTML5, CSS3, JavaScript, Redux, React
Senior Software Development Engineer
2018 - 2018
WWE
- Developed features for wwe.com with front-end technologies and Drupal.
- Developed a microsite using new technologies such as Gulp and Webpack. (http://www.wwe.com/wwenetwork).
- Implemented A/B testing in the network landing page and integrated it with the main site.
Technologies: Agile, Drupal, Gulp, Webpack, Sass, HTML5, CSS3, jQuery, JavaScript
Senior Software Development Engineer
2017 - 2017
Reelz/ReelzTV
- Developed the site for ReelzTV from scratch. ReelzTV is a platform similar to Netflix.
- Developed a web app for Amazon Fire TV using IAP API for web apps and requested the service from our API developed in C#.
- Architected and developed the client-side front end.
- Developed some new features and fixed bugs for the Reelz website.
Technologies: IAP SDK, HTML5, CSS, jQuery, JavaScript
Senior Software Development Engineer
2016 - 2017
HBO GO Asia
- Led four front-end team members for an HBO GO Asia for the Philippines and Singapore project. Collaborated with the back-end and mobile iOS and Android teams.
- Created the site from scratch. Designed the site based on logical functionality in HBO Europe and replicated the design from the US site, putting in some custom functionality.
- Recommended some changes in the API to retrieve the correct information on the front-end side.
Technologies: Amazon Web Services (AWS), HTML5, Sass, jQuery, JavaScript, Bower, Gulp, Vanilla JS
Senior Software Development Engineer
2016 - 2016
Warnerbros
- Developed software front ends. The project involved back and front-end technologies wrapped on Drupal modules and themes.
- Created the front end of the new website.
- Helped the UX designer make the design compatible with Drupal 8.
Technologies: Drupal 8, jQuery, Prototype Framework, JavaScript, CSS, HTML, MySQL, PHP, Apache, Linux
Software Developer
2013 - 2015
Devspark
- Developed software end to end for APIGEE. Worked with XML, Java, JavaScript, and Python to add extra functionality in the RESTful API to obtain the behavior that clients expect.
- Developed and refactored all sites for the Discovery company to make them responsive using WordPress 3.8.
- Developed using the Tizen wearable app SDK for the Piksel company using HTML5, CSS3, jQuery Mobile, and Android.
Technologies: PHP, CSS3, jQuery Mobile, JavaScript, HTML5
Software Developer
2008 - 2012
Globant
- Worked as a quality engineer in the US for Orbitz (www.orbitz.com), a leading travel agency. Used Qlikview Software to show company metrics as well as QED internal site development in Ruby on Rails.
- Performed component testing of OrbitzHosts through app isolation using MockObjects. Created test cases using Java, JMeter, Selenium, RIDE, AccuRev, Python, Batch, and other tools promoted by Orbitz.
- Developed an API for Google Buzz using PHP and Agile Methodology (http://code.google.com/intl/es-ES/events/io/2010/about.html).
- Worked as a contractor for playdom.com. Migrated Facebook and MySpace games to the Playdom site.
- Fixed software issues for Sisertel.
- Worked as a consultant for Riverwood (http://www.riverwoodcapital.com). Migrated the company website from a static site to a dynamic site. Administered the website using a CMS (Joomla!). Developed the site using HTML and JavaScript for fast information retrieval.
- Used WordPress to develop a car insurance website (www.carinsurance-choices.com). Adapted WordPress by building and installing various plug-ins, giving it CMS-like functionality. Used LAMP as the main development environment, as well as JavaScript and CSS.
- Used the LAMP platform, the Symfony framework, and Agile Methodology to create a microcredit website for Planet Finance.
- Performed technical analysis for a future social website project named VendorBooks. Migrated the current site developed in Joomla 1.0 to Joomla 1.5.
- Developed administrative website functionality for Fonalix.
Technologies: PostgreSQL, Ruby on Rails (RoR), Selenium, Java, WordPress, Joomla, Symfony, XML, JSON, REST, Ajax, CSS, jQuery, JavaScript, HTML, PHP, MySQL, Apache, Linux
Software Developer
2011 - 2011
Self-employed
- Developed software for Brigades.org.
- Advised and directed development projects remotely.
Technologies: JSON, HTML, Prototype Framework, jQuery, Ajax, JavaScript, PHP 5
Web Developer
2008 - 2009
W3 Comunicación S.R.L
- Worked as a web developer for a number of well-known companies, including McDonalds, BMW, and Citibank.
Technologies: MySQL, Joomla, Smarty, JSON, Ajax, JavaScript, HTML, PHP
Project History
Palm.com
Developed a website for Palm.com based on templates/design using Smarty, PHP, MySQL, CSS, JavaScript, and HTML technologies.
I acted as a software developer, working with two more developers to build the website from end to end.
I acted as a software developer, working with two more developers to build the website from end to end.
Citibank Puerto Rico
Created with HTML, CSS, and JavaScript.
Citibank Chile
I helped to develop the website for Citibank's Chile branch.
Tmf-au
Built on Drupal, jQuery, CSS, and HTML.
Longdrift
A Smarty template.
Software Engineer
https://www.leloir.org.ar/I specialize in creating efficient, dynamic, and user-friendly Joomla-based websites that deliver a seamless experience for both clients and end-users. Leveraging Joomla's powerful CMS features, I build websites that are highly customizable and scalable, with a focus on security, performance, and ease of content management.
CarInsurance
A site built on WordPress.
Empowered
A website built using the Zend framework.
Cinsay
I built this website's administrative features using Magento.
Stockngo
A web shop built on Magento.
Planet Finance Group
Built using the Symfony framework.
A Discovery Company
http://www.stuffyoushouldknow.com/Development and refactoring of all the sites to make them responsive. It is developed in WordPress 3.8 and deployed in AWS.
Stuff to Blow Your Mind | A Discovery Company
A HowStuffWorks site.
Stuff You Missed in History Class | A Discovery Company
http://www.missedinhistory.com/A HowStuffWorks site.
Stuff They Don't Want You to Know | A Discovery Company
http://www.stufftheydontwantyoutoknow.com/A HowStuffWorks site.
Stuff Mom Never Told You | A Discovery Company
http://www.stuffmomnevertoldyou.com/A HowStuffWorks site.
HBO GO Asia
https://www.hbogoasia.com/Built the front end of HBO GO Asia's sites for Hong Kong, the Philippines, and Singapore. I led the development of the HBO GO project for Asia, utilizing vanilla JavaScript, HTML, and jQuery. My responsibilities included maintaining effective communication with other teams, such as the back-end and mobile teams, and defining the API requirements. Through this coordination, I ensured the seamless integration of different components and the successful delivery of the project.
Warner Bros Website
https://www.wblicensedadvertising.comI was responsible for developing the front end of Warner Bros.' new website, using Drupal as the primary platform. My work involved building responsive and dynamic components tailored to the brand’s visual and functional requirements. Collaborating closely with the UX designer, I adapted the site’s design to fit seamlessly within the constraints of Drupal 8, ensuring an optimal user experience across all devices. This included custom theming, implementing various front-end modules, and fine-tuning interactions for a more engaging user journey. By aligning with Warner Bros.' vision and maintaining high standards for design and functionality, I contributed to a robust, visually appealing, and user-friendly site that successfully met both the company's needs and industry standards.
Software Engineering Consultancy
For this website, I helped with issues on Magento Community 2.1, fixing functionality with some plugin integrations and also an issue with the front-end view.
Technologies used: Linux, Apache, PHP, MySQL, HTML, CSS, Sass, JavaScript, jQuery
Important patterns used: MVC, Factory, Singleton, Registry, Observer, Agile (Scrum)
Technologies used: Linux, Apache, PHP, MySQL, HTML, CSS, Sass, JavaScript, jQuery
Important patterns used: MVC, Factory, Singleton, Registry, Observer, Agile (Scrum)
ReelzTV Web App
Developed from scratch in JavaScript, HTML5, and CSS for Amazon Fire TV using IAP API for Web Apps in C#. Also included new features and bug fixes.
WWE.com
Developed front-end features using HTML5, CSS3, Sass, JavaScript, and Drupal. Also developed a micro-site, implemented A/B testing for the landing page, and integrated the testing with the main site.
TodayTix
https://www.todaytix.comI developed front-end features using HTML5/CSS3, Sass, JavaScript, Webpack, React, and Redux and created functionalities for posts viz WordPress. I also installed WordPress Plugins to integrate images in S3 Bucket with Imgix.
Sugarfina.com
Developed custom modules and fixed bugs in production for this website, as well as contributed to requirements on the front end.
PayPal Pay Later
https://www.paypal.com/us/digital-wallet/ways-to-pay/buy-now-pay-laterI developed new features for Pay Later (Honeypay/PayPal plugin) using React/Redux GraphQL. I updated PayPal UI/npm packages (modified components in React and updated packages).
I also created components to support A11y accessibility. I then incorporated optional chaining and replaced Lodash's library to reduce bundle sizes. I modified the React component to include different functionalities based on mobile native or the Webview app.
Technologies used: React, Redux, JavaScript ES6, CSS3, HTML5,
Webpack, GraphQL, BrowserStack,GitHub, Jira, and Agile methodology (Scrum).
I also created components to support A11y accessibility. I then incorporated optional chaining and replaced Lodash's library to reduce bundle sizes. I modified the React component to include different functionalities based on mobile native or the Webview app.
Technologies used: React, Redux, JavaScript ES6, CSS3, HTML5,
Webpack, GraphQL, BrowserStack,GitHub, Jira, and Agile methodology (Scrum).
YingHua International School Website
https://www.yhis.org/Provided support for the Joomla-based website by crafting new pages, implementing updates to existing content, and enhancing the responsiveness of modals and pop-ups. Additionally, I played a key role in facilitating the smooth transition to our new React-built site.
https://e-tiandi.com/
https://e-tiandi.com/WORK DONE
• Migrated a PHP project to an EC2 instance running LAMP (Linux, Apache, MySQL, and PHP).
• Migrated the DNS management to Cloudflare for improved performance and security.
• Debugged and fixed issues with some legacy code where certain functionalities weren't working as expected.
• Migrated a PHP project to an EC2 instance running LAMP (Linux, Apache, MySQL, and PHP).
• Migrated the DNS management to Cloudflare for improved performance and security.
• Debugged and fixed issues with some legacy code where certain functionalities weren't working as expected.
TALLER.US
https://taller.us/I designed and developed a fully responsive website for Taller.us from the ground up using TypeScript and React, ensuring pixel-perfect accuracy across all devices. I integrated API calls to create dynamic and interactive user experiences. Additionally, I developed an internal tool in Angular 12, implementing new features and reusable components to enhance functionality. I optimized the site for various screen sizes, from mobile devices to 5K displays, ensuring a seamless and consistent user experience across all platforms.
Education
2012 - 2012
Diploma in Business and Management
Unicen - Tandil
2001 - 2008
Bachelor's Degree in System Engineering
Unicen - Tandil
Certifications
JUNE 2021 - PRESENT
JavaScript
www.testdome.com
JUNE 2021 - PRESENT
SQL
estdome.com
SEPTEMBER 2020 - PRESENT
JavaScript
HackerRank: https://www.hackerrank.com/certificates/6f2303236cf3
Skills
Libraries/APIs
React, React Redux, jQuery Mobile, jQuery, jQuery UI, Mustache, Highcharts, Reactstrap, Node.js, Tizen Wearable, Facebook API, Google API, REST APIs, Jira REST API
Tools
GitHub, Jira, Sketch, NPM, Gulp, Adobe Photoshop, PhpStorm, Apache, Bower, Jenkins, Webpack, Bower Front-end Dependency Manager, Cordova Plugins, Canva, Adobe Dreamweaver, Eclipse IDE, Figma, BrowserStack, Syncfusion, Prisma
Languages
HTML, CSS3, HTML5, PHP, SQL, JavaScript, PHP 5, CSS, JavaScript 6, Sass, ECMAScript (ES6), Java, Less, Pascal, XML, GraphQL, ES7, TypeScript, Python, Python 3
Paradigms
Scrum, Agile, Responsive, Responsive Coding, Procedural Programming, Object-oriented Programming (OOP), Agile Software Development, REST, Functional Programming, Test-driven Development (TDD), Behavior-driven Development (BDD), Asynchronous Programming, Class-based OOP, Unit Testing, Search Engine Optimization (SEO), Business Intelligence (BI)
Frameworks
Bootstrap, Slim, Prototype Framework, Symfony, Selenium, Redux, Express.js, React Native, Smarty, Android SDK, Ruby on Rails (RoR), Zend Framework, Foundation CSS, Next.js, Angular, Vanilla JS, Tailwind CSS
Platforms
WordPress, LAMP, Ubuntu Linux, MacOS, Ubuntu, Magento Community Edition, Amazon EC2, Magento, Joomla, Linux, Windows, Apache2, iOS, Drupal 8, Drupal, AWS Lambda, Firebase, Magento 2, Oracle, Amazon Web Services (AWS), Android, Azure, Web, Vercel
Storage
MySQL, Amazon S3 (AWS S3), MongoDB, Memcached, JSON, Cache, PostgreSQL, MariaDB
Other
Full-stack, Front-end, Ajax, Graphic Design, eCommerce, Wamp, JetBrains IDE, IAP SDK, Software Architecture, Software Design, Software Development, Algorithms, OOP Designs, Mathematics, Ecology, Economics, Technology, Startups, 3D Animation, 3D Modeling, SOAP, APIs, Custom CMS Development, Cloudflare, Responsive UI, Bootstrap 4, API Integration, prisma, Cursor AI, AI Tools, AI Agents, LLM Agents, Gemini, Websites, Turborepo
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