I'm Kat Siegal, a software engineer.

I live in San Francisco and work on iOS apps at Facebook. I love building intuitive, performant, reliable software and tooling for mobile app users and fellow developers alike.

I'm also an avid bus and rail fan and an advocate for public transit, safe streets, housing, and tenant protections. I like to use my technical and design skills in service of causes I care about. Recent projects I've worked on include muniroutes.com, reinvestin.us, and streetcar.live.