Antonio Essex-lettieri is an engineering manager based in the San Francisco Bay Area with 15 years of hands-on software experience and over 20 years building products and growing teams. He has led cross-functional engineering organizations at seed-stage startups and scaled companies, most recently guiding frontend and full-stack initiatives as an Engineering Manager at Productiv after senior leadership roles at Telemetry and Scoop. Antonio blends people leadership with regular hands-on contributions—he’s shipped frontend features, driven architecture pivots, and personally contributed to popular open-source work on Foundation’s Reveal modal to improve lifecycle control and test coverage. He is comfortable engaging directly with customers and product teams to translate research into pragmatic, incremental delivery. Known for steering teams through pivots and hire-to-scale phases, he focuses on aligning technical decisions with business impact. His background spans web, mobile, and legal-industry systems, and he brings a pragmatic, design-aware approach shaped by early independent consulting.
15 years of coding experience
18 years of employment as a software developer
B.S Computer Information Systems, B.S Computer Information Systems at University of West Florida
A.S Computer Studies, A.S Computer Studies at University of Maryland Europe
The most advanced responsive front-end framework in the world. Quickly create prototypes and production code for sites that work on any kind of device.
Role in this project:
Front-end Developer
Contributions:15 commits in 2 years 2 months
Contributions summary:Antonio primarily contributed to the `foundation/foundation-sites` repository by enhancing the functionality of the Reveal modal component. They implemented callback events, providing more control over the modal's lifecycle. The user updated the core JavaScript file to include the callback functions and event triggers. Additionally, they updated the test file, implementing reveal functionality and testing with animations.
Contributions:151 commits, 142 pushes, 1 branch in 3 days
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Antonio Essex-lettieri - Engineering Manager at Productiv