David Frost

Software engineer working on cloud infrastructure at Capital One.

Now

I'm building Retrofolio, a portfolio backtester I started because I wanted to know what would have happened if I'd actually held the things I almost bought. It's a Next.js and FastAPI app with an async task pipeline for the long-running backtests. At Capital One I work on the network infrastructure behind the web and mobile apps, mostly cloud engineering, infrastructure-as-code, and CI/CD. I'm pretty obsessed with Claude Code right now. I'm using it all day at Capital One and after hours too, and it's the most fun I've had building things in years.