Cesar Castillo
WHO I AM
I build AI-driven lifecycle and email systems that generate, optimize, and deploy production-ready templates. I create internal tools using structured prompting and rule-based parsing to produce modular, email-client-safe HTML with consistent rendering across environments. Using ESP scripting (AMPscript, Liquid, Handlebars) and AI-assisted workflows, I automate template generation, enforce quality standards (dark mode, accessibility, link integrity), and enable rapid iteration while maintaining clean, reliable email code.
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.





