Anthony Castrio is a software developer and cofounder of ApplyAll. His independent work spans founder communities, newsletters and interactive maps, including a cartogram that reshapes New York around subway travel time.[1][2]
Start with NYC Commute POV →
GitHub 
X · AnthonyCastrio Career
After university, Castrio worked at Loom and then freelanced. He built Indie Worldwide around introductions and meetings for bootstrapped founders, alongside the AI newsletter Bot Eat Brain. In 2024 he reported selling both businesses, freelancing for ApplyAll and then joining it full-time as a cofounder.[9][1]
Contributions
Make travel time visible as a distorted map
NYC Cartogram combines MTA GTFS subway data with walking access and borough boundaries. The interactive map lets a user pin an origin and inspect estimated travel times while the city warps around it; a separate static SVG expands areas with stronger subway access. The model includes the Staten Island Ferry but excludes buses, regional rail and real-time schedules. A visually nearby place can therefore remain far away in travel time.[2]
Design the introductions, not just the chat room
His Indie Worldwide account describes a founders’ club built around hand-reviewed introductions, alongside community events. Rather than assuming that adding people to a group creates useful connections, he chose which members should meet. His newsletter experiments similarly turned publishing into a repeatable business, with sponsorship commitments helping him maintain a schedule.[8][7]
Tools, writing & talks
Apps
Start here
NYC Commute POVcastrio.meAn interactive transit-time cartogram built from subway schedules and walking access.
Pin a familiar origin, toggle the warp and compare estimated times to several destinations. Read the transport exclusions before planning around the map; it models schedules and walking rather than current delays.
Creator[2]Original source
Writing, research & talks
- Building Indie Worldwidestarterstory.com
A first-person account of turning a founder community into recurring introductions and events.
Founder and interview subject[8]