Cesar Castillo

WHO I AM

With extensive email development experience, I build performant, accessible, and responsive emails using semantic, modular HTML and CSS. I leverage ESP scripting (AMPscript, Liquid, Handlebars) to deliver dynamic, data-driven personalization at scale. I lead rebrands, migrations, and audits—focusing on deliverability, dark mode, and WCAG accessibility—while emphasizing scalable architecture, reusable components, and robust QA. I also engineer and maintain internal design systems and frameworks to streamline production and ensure campaign consistency.

EXAMPLES

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COMPANIES

I've worked with

Google Fiber

DoorDash

InboxMonster

OpenSea

Indeed

Target

BeachBody

FITURE

Really Good Emails

ESPs

I've mastered

Iterable

SFMC

Braze

Customer.io

HubSpot

Mailchimp

AND MORE.

CONTACT

Let's chat

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