Who I Am

I’m Xavier Puspus. I build things.

I studied applied physics at the University of the Philippines Diliman, then applied business analytics at the University of Asia and the Pacific. The physics part of my background is the part that still shapes how I think: read the system, write down what you observe, propose the smallest model that explains it, then test the model against new measurements. Most of what I work on now is software, but the discipline carries.

These days my interests sit at the intersection of AI infrastructure and the slow, useful kind of public-interest work. I spend time on retrieval systems and how to evaluate them honestly, on cloud architecture as a generative artifact rather than a hand-typed YAML file, and on the harder problem of making Philippine civic data legible to anyone who wants to look. Earthquakes, weather, typhoons, procurement records, accountability graphs. The data exists. The plumbing usually does not.

I write here when I have something concrete to say. Most of the posts are case studies of tools I’ve built and what I learned from the building. No hot takes, no industry commentary. Just the work and what it taught me.

Reach me at xpuspus@gmail.com.