Cesar Castillo
WHO I AM
With extensive email development experience, I build scalable, high-performance, and accessible campaigns using semantic, modular HTML and CSS. I leverage ESP scripting (AMPscript, Liquid, Handlebars) to power data-driven personalization and AI-assisted automation at scale, including building AI-driven systems that improve internal efficiency and production workflows. I design and maintain internal frameworks and component libraries that incorporate dark mode optimization, WCAG accessibility, and semantic standards to streamline production and ensure consistency.
COMPANIES
I've worked with
Apple
Google Fiber
DoorDash
Indeed
Target
OpenSea
Strava
InboxMonster
FITURE
ESPs
I've mastered
Iterable
SFMC
Braze
Zeta Marketing
Customer.io
HubSpot
AND MORE.





