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, localization, and AI-assisted automation at scale. I’ve led rebrands, platform migrations, and audits, with expertise in deliverability, dark mode optimization, and WCAG accessibility. I also design and maintain internal frameworks and component libraries that streamline production, ensure consistency, and elevate cross-team collaboration.

EXAMPLES

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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.

CONTACT

Let's chat

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