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I’m a frontend-focused designer-developer with 15+ years of experience crafting scalable frontend modules and cohesive design systems. I bridge design and code to deliver responsive, accessible, high-performance interfaces for global brands. My strength lies in a design-to-code approach: transforming visual systems and prototypes into modular, reusable components that scale across projects and teams. I thrive in distributed, international teams across the US and India, keeping daily communication clear and delivery predictable. I bring together design, backend, and marketing perspectives to ship solid products that reinforce brand identity while continually improving usability and performance.…I’m a frontend-focused designer-developer with 15+ years of experience crafting scalable frontend modules and cohesive design systems. I bridge design and code to deliver responsive, accessible, high-performance interfaces for global brands. My strength lies in a design-to-code approach: transforming visual systems and prototypes into modular, reusable components that scale across projects and teams. I thrive in distributed, international teams across the US and India, keeping daily communication clear and delivery predictable. I bring together design, backend, and marketing perspectives to ship solid products that reinforce brand identity while continually improving usability and performance.

Juan David Hernandez

Graphic Designer, Front-End Developer, Web Designer, +3

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I’m a frontend-focused designer-developer with 15+ years of experience crafting scalable frontend modules and cohesive design systems. I bridge design and code to deliver responsive, accessible, high-performance interfaces for global brands. My strength lies in a design-to-code approach: transforming visual systems and prototypes into modular, reusable components that scale across projects and teams. I thrive in distributed, international teams across the US and India, keeping daily communication clear and delivery predictable. I bring together design, backend, and marketing perspectives to ship solid products that reinforce brand identity while continually improving usability and performance.…I’m a frontend-focused designer-developer with 15+ years of experience crafting scalable frontend modules and cohesive design systems. I bridge design and code to deliver responsive, accessible, high-performance interfaces for global brands. My strength lies in a design-to-code approach: transforming visual systems and prototypes into modular, reusable components that scale across projects and teams. I thrive in distributed, international teams across the US and India, keeping daily communication clear and delivery predictable. I bring together design, backend, and marketing perspectives to ship solid products that reinforce brand identity while continually improving usability and performance.

Available to hire

I’m a frontend-focused designer-developer with 15+ years of experience crafting scalable frontend modules and cohesive design systems. I bridge design and code to deliver responsive, accessible, high-performance interfaces for global brands. My strength lies in a design-to-code approach: transforming visual systems and prototypes into modular, reusable components that scale across projects and teams.
I thrive in distributed, international teams across the US and India, keeping daily communication clear and delivery predictable. I bring together design, backend, and marketing perspectives to ship solid products that reinforce brand identity while continually improving usability and performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Portuguese

Intermediate

German

Intermediate

French

Intermediate

Work Experience

Frontend Developer at Freelance

July 1, 2023 - Present

React/Next.js development with a Laravel backend for UO Solutions, transforming Figma designs into modular components and complete pages. Implemented dynamic content fetching and multilingual support (internationalization - i18n EN/ES). Also developed WordPress sites for Responsive Media NYC including theming, content setup, and e-commerce integration; performed full UI/UX improvements and responsive, accessible frontend implementation. CPTs, themes, and HubSpot CMS customization were also handled to ensure consistent branding and performance.

Freelance Front-End Developer

July 1, 2023 - Present

Delivered front-end solutions for React and Next.js projects, transforming Figma designs into responsive interfaces ensuring performance and scalability. Collaborated with development teams to align frontend implementation with backend requirements, ensuring scalable and user-friendly web apps.

Frontend Developer at MuleSoft

March 1, 2023 - September 24, 2025

Owned the training.mulesoft.com platform following a seamless transition from an external provider. Built the new design system and a Storybook library tailored for consistent integration with the site’s LMS/CMS constraints; supported UX/UI and back-end teams; improved performance and accessibility; conducted UX, accessibility, and performance testing; implemented lazy loading and resource minimization to enhance UX across devices.

Frontend Developer / Web Designer at MuleSoft

March 1, 2023 - September 23, 2025

Owned the training.mulesoft.com site and led its migration to Trailhead Academy, directing traffic from an external provider; led platform migration with zero downtime during onboarding and decommissioning; rolled out new design system components and a shared multi-site mega menu.

Frontend Developer at MuleSoft

November 1, 2021 - March 1, 2023

Frontend development with a Laravel backend for UO Solutions, transforming Figma designs into modular components and complete pages. Implemented dynamic content fetching and multilingual support (internationalization - i18n EN/ES).

Web Designer & Developer at Wunderman Thompson

July 1, 2021 - September 24, 2025

Enhanced, maintained, and developed production tools for United Airlines and Wunderman, including web applications supporting user engagement, automating content workflows, and optimizing project management processes. Managed daily updates to the site, redesigned content for accessibility, and collaborated with cross-functional teams across the US and India to align goals and ensure timely delivery. Built front-end components and functionality for WordPress and HubSpot projects, tailored to client needs.

Web Designer & Developer at Wunderman Thompson

July 1, 2021 - September 23, 2025

Enhanced front-end production tools for United Airlines and Wunderman; built web applications to support user engagement, automated content workflows, and optimized project management processes; managed daily updates to UNITED.com; collaborated with cross-functional teams across US and Argentina.

Web Designer & Developer at Wunderman Thompson

March 1, 2016 - July 1, 2021

Web Designer & Developer at Lenovo

August 1, 2015 - September 24, 2025

Maintained and updated lenovo.com for Spanish-speaking Latin American countries, ensuring accurate and timely content delivery. Contributed to two major graphic identity redesigns, improving brand alignment and user experience. Provided dedicated support for lenovo.com in Brazil, including design, frontend implementation, and regular updates of promotional websites, homepage content, marketing pages. Collaborated with cross-functional teams in Argentina, Brazil, and the US to support regional initiatives.

Web Designer & Developer at Lenovo

August 1, 2015 - September 23, 2025

Maintained and updated lenovo.com for Spanish-speaking Latin American countries; contributed to two major graphic identity redesigns; supported Lenovo.com in Brazil with front-end implementation and site assets.

Web Designer & Developer at Lenovo

November 1, 2011 - August 1, 2015

Maintained and updated lenovo.com for Spanish-speaking Latin American countries, ensuring accurate and timely content delivery. Contributed to two major graphic identity redesigns, enhancing brand alignment and user experience. Provided dedicated support for Lenovo.com in Brazil, including design, frontend implementation, and regular updates of promotional websites, homepage content, marketing pages, and other digital assets.

Web Designer at MKT I Crossmedia

January 1, 2011 - September 24, 2025

Designed and implemented web projects, including CMS templates and full website redesigns such as the Banamex banking website; produced digital marketing assets (minisites, emails, banners) for brands like PayPal, Aviana, and Despegar; provided creative support for campaign development, ensuring designs aligned with brand identity and marketing goals.

Web Designer at MKT I Crossmedia

January 1, 2011 - September 23, 2025

Designed and implemented web projects, including CMS templates and full website redesigns; developed digital marketing assets such as mini-sites, emails, and banners; provided creative support for campaigns; executed HTML/CSS/Flash implementations.

Web Designer at Bogota Web Designer

January 1, 2007 - January 1, 2011

Developed digital marketing assets including minis, emails, and banners for brands such as PayPal, Avianca, and Despegar.

Web Designer at MKT I CROSS MEDIA

January 1, 2007 - January 1, 2011

Designed and implemented web projects, CMS templates, and full website redesigns (e.g., banking and marketing sites). Created digital marketing assets such as minis, emails, and banners for various brands.