Geoffrey Day is a product-focused technologist and composer with 11 years of software and product leadership experience based in Cambridge, MA. He led product and engineering initiatives at Filtered.ai as Head of Product and drove growth and activation efforts as a Tech Lead at HubSpot, blending data-informed experimentation with hands-on engineering. Geoffrey publishes new heavy-music compositions and analyses biweekly on his Geoffplaysguitar YouTube channel, reflecting a rare mix of creative output and product rigor. Comfortable bridging sales, marketing, design, and engineering, he excels at turning user insights into measurable activation and retention outcomes. His background in computer science and a Reforge Growth Series credential underpin a pragmatic, growth-oriented approach to building products.
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.