Studying markets,building software.

I'm Rey. I study economics-philosophy and applied statistics at Columbia (class of 2029), build small apps on the side, and write about markets and technology. I'm headed toward work where finance and technology meet: quantitative finance or private equity.

Open to roles in quantitative finance and private equity

Projects

  • hindsightiOS

    Your saved posts, finally usable. Pulls in the hundreds of Instagram, Facebook and X posts you've saved and turns them into something you actually go back to.

    SwiftUI, XcodeGen · In development · 2026

    Case study
  • The Guest ListiOS

    TODO: one line on what The Guest List does and who it's for.

    SwiftUI

    Case study
  • dailyspendiOS

    A daily spending tracker. TODO: what makes it different from the others.

    SwiftUI

    Case study
  • Prepper kitOpen source

    A free, offline emergency toolkit that fits on an SD card or USB stick. Plug it into any laptop and get reference material that works with no internet and no install.

    Coming soon

    Case study

Writing

All posts on Substack

Get in touch

Say hi. I like hearing about roles in finance and technology, and I'll happily take a coffee with anyone who works in markets and doesn't mind a lot of questions. If something here made you think of something else entirely, send that too.