Will Dennis
I’m a two-time start up founder and former VP of Product with a track record for building viral, engaging consumer products like Houseparty and WhatsApp that are used by billions.
I'm currently building LLM-powered products focused on the future of work and human connection.
I do my best work when I’m collaborating in-person at the intersection of novel user experiences, storytelling, human psychology, technology, and unproven ideas.
Get in touch
Feel free to reach out if you think I could be helpful or just to say hello. williamldennis@gmail.com
Current Projects
Waterfall
The Dream Machine
See my working LLM thesis and related projects →
Previous Product & Engineering Work
- Fractal AI Engineering Program - S25 (building agents, semantic search)
- VP of Product at WeightWatchers ($1 billion revenue digital product line)
- Product Manager at WhatsApp (2 billion user product surface)
- Head of Product at HouseParty (acquired by Epic Games)
- Product and UX consultant (Peloton, Stash, Human Ventures)
- CEO and cofounder of two seed-funded start ups (failed but learned :))
Previous Writing & Storytelling Work
- Co-Creator "Other People" TV Series (sold to FX Network)
- Writer & Director of Multiple Short Films (3 Vimeo Staff Picks)
- Writer & Director "Vanilla" (Award-Winning Feature Film)
- Occasional youtuber (250k+ views)
- Sometimes tech writer (blog posts below)