Hello, I'm Xiao

I've been coding as a full-stack engineer since 2020, and what keeps me going is seeing something I built actually making someone's day better. There's nothing quite like solving a real problem that matters. Right now, I'm working with the CodeExpert crew at ETH Zurich. Before that, I spent 4 amazing years at Ledgy (a cool SaaS company here in Zurich) where I learned so much and made some lifelong friends along the way.

Work Experience

CodeExpert (ETH Zurich)

https://expert.ethz.ch

Software Engineer

Sep 2024 - Present

  • Played a key role in migrating from Meteor to an RPC-based architecture with functional programming
  • Diagnosed and resolved critical production issues, improving system stability for ~10,000 student users
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Ledgy

https://app.ledgy.com

Software Engineer

Nov 2020 - Aug 2024

  • Led a team of 2–4 engineers to build a suite of in-app financing reports targeting the new enterprise market segment
  • Improved app performance by ~50% for large client datasets by profiling with dev tools, reducing algorithm complexity, eliminating unnecessary renders, and introducing Web Workers
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Projects

Petipal

https://www.petipal.com

A side project I am building with a friend. It is a full-fledged web app that helps pet owners and pet sitters connect without any hassle.

Precision Proteomics Davos

https://www.precisionproteomics.uzh.ch

I built the official website for the research group Precision Proteomics Davos. I also designed the logo and the website.

@ 2025 Xiao Sun