William Essilfie
Lead Product Manager at Teachers Pay Teachers
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolWilliam Essilfie is a product leader with 11 years of experience building discovery, personalization, and ML-driven marketplace experiences, currently leading Core Marketplace and SEO at Teachers Pay Teachers after its acquisition by IXL Learning. He has a track record of shipping 0-to-1 products and scaling search, recommendations, and monetization at both startups and large tech firms, including Meta and RangeMe. Will blends hands-on data science and experimentation with cross-functional leadership to improve search relevance, conversion, and marketplace liquidity for millions of educators. Now pursuing an Executive MBA focused on AI at Columbia Business School, he is especially interested in how AI can transform marketplaces and learning. Outside product work he writes about personal finance and has a history of building early AI assistants and student-facing platforms, reflecting a mix of technical curiosity and user-centered design.
11 years of coding experience
7 years of employment as a software developer
Executive MBA, Executive MBA at London Business SchoolExecutive MBA, Artificial Intelligence, Executive MBA, Artificial Intelligence at Columbia Business SchoolBachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at Columbia College, Columbia University
English, Spanish
Github Skills (29)
edtech9
flask9
wordpress-api8
jekyll8
tailwindcss7
facebook-chatbot7
react7
meteor-up6
discord-bot6
wordpress6
nextjs6
facebook-messenger-bot6
discord-js6
mup5
discord5
Programming languages (6)
Github contributions (5)
wessilfie/wessilfie.github.io
Jan 2018 - May 2026
My personal website
Contributions:9 PRs, 165775 pushes, 8 branches in 8 years 6 months
reactnextjs
woke/woke.github.io
Jun 2018 - Jul 2020
So You Want To Be Woke's website.
Contributions:47 commits, 3 PRs, 46 pushes in 2 years 1 month
reacttailwindcssdiversitywokeflask
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