Hey, I’m Juan Sánchez
Senior {Full Stack} Web Developer_
<p>
Versatile and results-driven full-stack developer with over 15 years of experience working in multinational, remote, and cross-functional teams, using core technologies like JavaScript, HTML5, CSS, and PHP. Specialized in modern frameworks such as React (6+ years), Angular (from AngularJS to Angular 16+), Next.js, and SvelteKit. Expert in UI/UX optimization, performance, SSR/SSG rendering, multilingual support (i18n), and decoupled component architecture. Effective communicator committed to code quality, maintainability, and successful project delivery, with a proven track record of 30+ projects across e-commerce, OTT, fintech, and healthcare.</p>
+
Year Experience
+
Projects Completed
+
Satisfied Clients
+
Technologies Mastered
Through consulting firms, agencies, and enterprise projects, I’ve contributed to platforms used by leading global companies:
Building digital experiences that perform and inspire
Front-End Development
Creating responsive, dynamic, and modular interfaces using React, Angular, Next.js, and SvelteKit, with a focus on accessibility, usability, and performance. Styled with Tailwind CSS and SCSS.
Performance Optimization
Improving load times and user experience through virtualization, code splitting, caching strategies, efficient rendering, and lazy loading.
API Integration & Data Flow
Managing communication between services using REST and GraphQL, with efficient sync via Apollo, Firebase, and custom PHP APIs. Integrated payment gateways like PayPal and Mercado Pago for e-commerce projects.
Component Libraries & Decoupled Architectures
Designing reusable UI components following the Atomic Design methodology and building decoupled solutions using WordPress/WooCommerce as backend with React or Angular as frontend, connected via RESTful APIs. Maintaining scalable architecture and visual consistency with tools like Storybook, especially in collaborative environments.
Testing & Quality Assurance
Writing reliable unit and integration tests with Jest, Vitest, Jasmine, Karma, and React Testing Library. Automating end-to-end tests using Cypress and Selenium IDE. Implementing automated test flows and continuous integration with CI/CD pipelines.
Internationalization (i18n)
Supporting multilingual applications with efficient i18n strategies, user-adapted localization, and SEO-friendly routing.
Looking forward to collaborating on meaningful projects..
Let’s talk about your vision. Get in touch!
+15 years of experience in scalable development
Senior Web UI Developer
- Contributed to enterprise-level web applications for major clients including Univision, Abbott, Seven Parks, and Dick’s Sporting Goods. Worked in distributed teams across the U.S., LATAM, India, and Saudi Arabia.
- Seven Parks: Led secure session management and multi-device logout using SvelteKit + GraphQL. Implemented OAuth2/OpenID Connect flows with both provider-managed and in-house session strategies. Enhanced B2C cart logic and solved complex use cases. Applied unit and E2E testing with Vitest and Cypress.
- Dick’s Sporting Goods: Developed and maintained review module using Angular 16+, RxJS, and Bazaarvoice. Migrated tests from Jasmine/Karma to Jest, ensuring 100% unit test coverage. Built E2E tests with Cypress. Only two bugs reported in six months, thanks to robust testing.
- VIX.com (Univision OTT): Improved performance by 80% through virtualization, lazy loading, and component optimization. Monorepo architecture using React, Next.js, Apollo, GraphQL, TypeScript, Jest, and React Testing Library.
- Abbott LATAM: Developed a Progressive Web App (PWA) for pediatric professionals using Angular 11, Ionic, GraphQL, AWS Amplify, and AppSync. Implemented offline-first sync logic and used Jasmine/Karma for unit testing and Cypress for E2E.
- Consistently delivered production-ready features aligned with business goals and technical standards. Skilled in clean architecture, reusable components, and performance optimization. Adapted to fast-paced, cross-cultural environments with a focus on scalability, collaboration, and user experience.
+15 years ofexperiencein scalable development
Full Stack Developer & UI Designer
- Led full stack solutions for education, retail, betting, healthcare, and automotive sectors.
- Developed a custom Stock & POS Management System using React + Firebase RTDB, integrated with WordPress/WooCommerce. Supported real-time sync between cashier terminals and automatic stock updates for online and physical stores. Originally built in AngularJS, migrated to React (class components in 2019, hooks in 2020).
- Implemented decoupled architectures using WordPress/WooCommerce as backend and React or Angular (6–8, 11) as frontend, connected via RESTful APIs.
- Integrated PayPal and Mercado Pago payment gateways into WordPress/WooCommerce shops.
- Developed custom PHP APIs for business logic and data sync. Also provided hosting, domain management, and client consulting.
- Key projects include:
- MC Store (2021) – E-commerce website built with WordPress + WooCommerce and a separate React + Firebase stock management app for multi-location inventory.
- Cocina Sabini & La Ensalada (2018–2020) – Branded WordPress-based sites with online stores and React/Angular (6–8) front ends.
- Dimac Home (2020) – Customized WooCommerce storefront with enhanced UX and performance.
- Sur Automóviles & Educa Gabinete (2015) – Institutional website and educational platform built with WordPress.
- Handled freelance work involving jQuery, PHP, and MySQL before transitioning fully to modern frameworks.
Education:
1998–2005:
ORT University, UruguayBachelor’s Degree in Information Systems Analysis
1996-1997:
IBM Study Center (M.R Accounting Academy)Programmer Analyst
My Projects and Works
Jualo.uy
Personal freelance portfolio and digital solutions hub, centralizing projects from 2015 to present. Showcases 15+ years of experience across education, retail, automotive, and healthcare sectors. Features full-stack implementations using WordPress, WooCommerce, PHP, and decoupled front-ends with React, AngularJS (and Angular 6–8/11), and Firebase. Includes a custom real-time stock & POS management system integrated via Firebase RTDB and React, initially built in AngularJS and progressively migrated. Integrated payment gateways (PayPal, Mercado Pago).
- Project Info
Project
Personal Freelance
Completion Time
2015 – Present
Technologies
WordPress, WooCommerce, PHP, JavaScript, React, AngularJS, Angular 6–8, Angular 11, Firebase, jQuery, ACF, HTML5, CSS3, GitHub Actions
Seven Parks - Globant
Contributed to a modular e-commerce platform built with SvelteKit and GraphQL. Led secure session handling (OAuth2/OpenID Connect), multi-device logout, and optimized B2C sales flow through improved cart logic and UX. Supported migration from Houdini to Apollo, implemented scalable enhancements, and delivered multilingual layouts (LTR/RTL). Applied advanced unit and end-to-end testing (Vitest, Cypress) and used SvelteKit’s reactive stores.
- Project Info
Project
Seven Parks / Globant
Completion Time
8 months
Technologies
SvelteKit, GraphQL, Apollo, TypeScript, i18n, Vite, Vitest, Cypress, Storybook
Dick's Sporting Goods - Globant
Delivered a structured reviews module using Angular 16+, NgRx, and RxJS for a major U.S. retailer. Migrated and maintained tests from Jasmine/Karma to Jest and Cypress, achieving 100% unit test coverage. Developed adaptive skeleton components, managed modular architecture, and maintained high reliability (only two bugs in six months).
- Project Info
Project
Dick's Sporting Goods / Globant
Completion Time
7 months
Technologies
Angular 16+, NgRx, RxJS, Jest, Jasmine, Karma, Cypress, Bazaarvoice
VIX – Univision - Globant
Contributed to web and Smart TV (Samsung) OTT platforms using React and Next.js. Specialized in focus-based navigation with Norigin-Spatial-Navigation for TV, custom virtualization (no-scroll TVs), and performance optimization (80% faster loads). Used monorepo architecture and ensured full test coverage with Jest and React Testing Library.
- Project Info
Project
Univision / Globant
Completion Time
2 years
Technologies
React, Next.js, TypeScript, Apollo, GraphQL, Redux Toolkit, Jest, React Testing Library, Norigin-Spatial-Navigation, react-window, Storybook
Abbott – Diagnostics Web App - Globant
Developed a PWA for pediatricians using Angular 11, Ionic, GraphQL, AWS Amplify, and AppSync. Designed for offline use in remote areas with local/remote sync. Included dynamic charts, PDF generation with pdfmake, and CI/CD deployments. Led DevOps (AWS setup, automation pipelines) and automated testing (Jasmine, Karma, Cypress).
- Project Info
Project
Abbott / Globant
Completion Time
5 months
Technologies
Angular 11, Ionic, GraphQL, AWS AppSync, AWS Amplify, pdfmake, CI/CD, DevOps, Jasmine, Karma, Cypress, PWA
E-Planning Ad Server
Adapted ad slot logic from Flash to HTML5 Canvas for cross-browser compatibility, ensuring uninterrupted ad delivery after Chrome deprecated Flash. Served as Level 2 technical support, handling escalated incidents, hotfixes, and optimizations. Integrated with major media portals (Clarín, La Nación, CNN) and automated E2E testing with Selenium IDE.
- Project Info
Project
E-Planning
Completion Time
1 year
Technologies
HTML5, JavaScript, Flash, Google Ads, ASP.NET, AngularJS, Selenium IDE
IN Switch
Developed and maintained internal tools for a fintech transaction platform. Designed microservices in PHP/Erlang, automated financial workflows, and optimized backend–frontend interactions for performance and usability.
- Project Info
Project
IN Switch
Completion Time
7 months
Technologies
PHP, MySQL, JavaScript, jQuery, Erlang, HTML5, CSS3
MC Store
E-commerce store built with WordPress + WooCommerce and a standalone React + Firebase stock management app for physical stores. Supported real-time sync across branches, integrated with payment gateways (PayPal, Mercado Pago), dynamic UI, and ACF customization. Used AngularJS/Angular for legacy scripts.
- Project Info
Project
MC Store
Completion Time
3 months
Technologies
WordPress, WooCommerce, PHP, React, Firebase RTDB, AngularJS, Angular 6–8, jQuery, ACF, CSS3, HTML5, Elementor
PSC 23
Deployed and adapted a corporate landing page for a regional waste management and sanitation services company. Applied responsive design improvements using HTML5 and CSS, ensuring visual consistency and cross-browser compatibility. Handled domain setup, DNS configuration, and hosting on GoDaddy, delivering a clean and stable public presence for the client.
- Project Info
Project
PSC 23
Completion Time
1 month
Technologies
HTML5, CSS3, Responsive Design, Hosting (GoDaddy)
TOTEY y los Motores
Designed and deployed a visually engaging microsite for Uruguayan multi-instrumentalist Sergio “TOTEY” Núñez. Implemented a clean layout using HTML5 and CSS, integrated Bandcamp to showcase individual tracks and full albums. Originally connected to the Facebook Graph API to dynamically sync profile data—such as artist bio and contact info—directly into the page, enhancing maintainability and consistency. Currently hosted and managed on GoDaddy.
- Project Info
Project
TOTEY y los Motores
Completion Time
1 month
Technologies
HTML5, CSS3, Bandcamp Embed, Facebook Graph API, Hosting (GoDaddy)
Ramiro y Los Beisbol
Created a minimalist and functional site for the Uruguayan rock band Ramiro y Los Beisbol. The design balances simplicity and personality, using HTML5 and CSS for a fast, responsive experience. Integrated Bandcamp to showcase original tracks and albums. Initially connected to the Facebook Graph API to auto-update content such as band description and contact details directly from the official Facebook page. Hosted and maintained via GoDaddy.
- Project Info
Project
Ramiro y Los Beisbol
Completion Time
1 month
Technologies
HTML5, CSS3, Bandcamp Embed, Facebook Graph API, Hosting (GoDaddy)
Dimac Home
Developed and customized an e-commerce website for Dimac Home, a Uruguayan hardware and construction supply store. The project involved a full redesign using WordPress, WooCommerce, and Elementor, with tailored adjustments to meet specific product and layout requirements. Integrated ACF for dynamic content, handled payment gateways, and configured key plugins including Mega Main Menu and Slider Revolution. Ensured responsive design and performance across devices.
- Project Info
Project
Dimac Home
Completion Time
1 month
Technologies
WordPress, WooCommerce, PHP, JavaScript, jQuery, ACF
Skills
Front-End: HTML5, CSS3, JavaScript, RxJS, TypeScript, Sass, Tailwind, Flexbox, Grid, and media queries
Front-End Frameworks: React (6+ years of experience), Angular (from AngularJS to Angular 16+), Svelte, SvelteKit, Ionic, AngularJS, jQuery.
State Management & Reactivity: Redux Toolkit, Context API, NgRx (Angular), reactive $ stores and localStorage in SvelteKit, subscriptions to observables (RxJS) and component state in React/Angular.
Authentication: OAuth2, OpenID Connect, Azure B2C, Azure Active Directory, JWT.
Testing and Unit Testing: Jest, Vitest, Jasmine, Karma, Cypress, React Testing Library, Chrome DevTools, React DevTools, Feature Flags, A/B Testing.
End-to-End Testing: Cypress, Selenium IDE for recording browser flows, integrated into backend scripts for automated testing.
UI Component Architecture & Design Systems: Storybook, Atomic Design, scalable component systems, modular design patterns, visual documentation, and cross-team consistency.
Back-End: PHP, Node.js, Erlang, .NET
Back-End Frameworks: Laravel, CodeIgniter
CMS Platforms: WordPress, WooCommerce, PrestaShop, Shopify
Databases & APIs: MySQL, MongoDB, Firebase, PostgreSQL, AWS Amplify, Apollo, GraphQL, REST API, Swagger/OpenAPI
Development Tools: Git, CI/CD (Jenkins, GitHub Actions), Webpack, Vite, ESLint, Prettier, SonarQube, AWS Amplify, AWS AppSync, npm/yarn, CDN
Others: WebRTC, real-time chat with Firebase, Firebase Real Time Database, JSON, XML, Ajax, payment gateway integration (PayPal, Mercado Pago)
Languages: Spanish (Native), Portuguese (Advanced), English (Fluent)