Jep Castelein
Founding Product Manager at A Stealth AI Startup
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolJep Castelein is a founding product manager and martech specialist with over a decade of hands-on experience architecting Marketo-based solutions for mid-size and enterprise B2B companies. He built scalable, serverless integrations and deduplication systems at Marketo/Adobe and later founded Momentera to commercialize tooling that improves marketing data quality and recoverability. Known for turning messy marketing stacks into reliable data pipelines, Jep blends product leadership with deep technical fluency in integrations, automation, and data hygiene. Based in San Francisco, he has moved from consulting and tooling to leading product at a stealth AI startup, signaling a shift toward AI-driven martech. A practical entrepreneur, he often focuses on small, high-impact products (like data restore and export tools) that solve long-standing operational pain points.
10 years of coding experience
20 years of employment as a software developer
University of Twente
Github Skills (11)
python-client10
rest-api10
marketo10
api10
rest10
api-client10
python9
rest-client9
python-interface5
restful-api3
java2
Programming languages (1)
Github contributions (5)
jepcastelein/python_marketo
Oct 2015 - Dec 2015
Contributions:16 pushes in 2 months
apipythonpython-interfacemarketo-rest-apimarketo
jepcastelein/hello-world
Sep 2015 - Sep 2015
Contributions:2 PRs, 2 pushes, 3 branches in 1 day
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