Building AI agents to help businesses find and grow their best customers

Investing in pre seed through series A, if you're building something new I'd love to chat! hey@dane.to :-)

https://danewilliams.com/cobblestone-retrospective

Cobblestone was a seed stage prop tech company with $4M in funding from top investors such as Y Combinator, Andreessen Horowitz, Tishman Speyer (owner of Rockefeller center), and more. The company built an end to end tenant screening platform focused on fraud prevention for residential property managers and shut down in May 2025.

Full stack product engineer

Worked across the entire product starting at $0 revenue through closing our first 6 figure contracts as a company of just 4 people.

Python, TypeScript, React, Flask, PostgreSQL, Celery

https://danewilliams.com/farewell-workos

WorkOS is a venture backed startup with nearly $100M in total funding from top investors such as Lightspeed, Greenoaks, and Abstract. The company primarily sells APIs and platforms to SaaS vendors that simplify building "enterprise features" such as SSO, SCIM, and Audit Logs.

Full stack product engineer and lead for the Admin Portal (https://workos.com/admin-portal)

Worked across nearly all product surface area while scaling the engineering team from 7 to >25 and >5x ing revenue.

TypeScript, Next / React, Node, PostgreSQL, GraphQL, Nest

Undergraduate researcher

Coauthored a publication in ISVC 2021 (https://www3.nd.edu/~cwang11/research/isvc21-hsd.pdf)

JavaScript, D3