Nico Purnomo
Product manager. Data, ML, and the occasional rabbit hole.
I build data, ML, and AI products professionally, and share the analytical side here — interactive projects, articles, and ideas I find interesting.
↗ terminal-website-npurnomo.vercel.appCase Studies
Projects
Industry Financials
Interactive dashboard comparing financial metrics across US industries. Built on Damodaran's public data — pick any two metrics and explore.
Remember Covid?
Time series of excess deaths by country using The Economist's model. Confidence bands show estimation uncertainty across 2020–2024.
Earthquakes & Extreme Values
Global seismic data mapped and modelled with Generalised Pareto Distribution. Estimates the probability of extreme magnitude events.
SQL Away!
Write SQL queries live in the browser against a customer orders dataset. Powered by DuckDB-WASM — no server, runs entirely client-side.
Heathrow Forecast
ARIMA time series model forecasting passenger traffic at Heathrow. Accounts for Covid impact via dummy variable — with and without comparison.
Articles
Up Banking & Neobanks (2021)
How digital-only banks navigated the pandemic, what Xinja's collapse meant for the industry, and why Up's model was different.
Simile, Here & Everywhere (2023)
On similarity as a concept — from cosine distance to clustering to recommendation systems. Why measuring likeness is harder than it looks.
Data Reduction through Dynamic Range (2023)
Dynamic range, audio compression, and SVD — a unified lens on what it means to reduce complexity while preserving meaning.