01 / Sergio Fetter
Reporting, aggregated. Dashboards, automated. Decisions, sharper.
I take operational reporting nobody opens and turn it into live tools teams actually use. Across industries.
02 / Selected work
Things I’ve built.
Each replaced a stack of spreadsheets with a tool the team actually opens. All in production.
- 2025 DASHBOARD Predicting Car Prices with Multiple Regression Live ↗
- 2025 DASHBOARD Inventory Optimization: 18% Sales Growth Through Statistical Demand Forecasting Live ↗
- 2025 DASHBOARD Predicting Academic Success Live ↗
- 2025 DASHBOARD Chicago Crime Rate Live ↗
- 2025 DASHBOARD Anomaly Detection in Multifamily Water Usage Live ↗
03 / What I do
Three things, done seriously.
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01.
Aggregate.
I connect messy operational data — APIs, spreadsheets, exports, half-broken integrations — into one queryable place. The unglamorous foundation everything else depends on.
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02.
Visualize.
I build the dashboards your team actually opens. Not 200-tab Excel files. Not Tableau exports that break every quarter. Real tools, fit to the actual work being done.
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03.
Automate.
I replace the weekly “let me pull that report” ritual with something that just runs — refreshes on its own, flags what matters, stays out of the way otherwise.
04 / Latest
Writing and reading, in one stream.
Longer essays alongside short reactions to whatever I’m reading. The mix is the point.
- 2026·APR·10 ESSAY Simple vs. Stratified Sampling What's the Difference? 5 min
- 2026·APR·03 ESSAY The Statistical Trick That Lets 1,000 People Represent Millions 5 min
- 2026·MAR·30 ESSAY Central Limit Theorem 5 min
- 2026·MAR·27 ESSAY All Models Are Wrong! 5 min
- 2026·MAR·25 ESSAY What Universal Optmization Works Best? No-Free-Lunch Theorem 5 min
05 / About & connect
A little about me.
I’m Sergio. I’ve spent the last decade building data tools for operations teams — bridges between the spreadsheets no one trusts and the answers everyone needs by Monday.
The difference between a useful dashboard and a beautiful one is whether anyone actually opens it on Monday morning.
If you’ve got reporting that needs to grow up, a dashboard that needs to actually exist, or a pile of data nobody has the time to make sense of — let’s talk.
