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datascience
136 posts
Where Did This Trade Come From? Attributing DEX Volume in Dune SQL
This is an adapted excerpt from Chapter 6 of my book, The DeFi Data Quick-Start: Reading On-Chain Truth…
Construyendo un recomendador de emparejamiento de expertos
La forma del problema Un directorio es una superficie: el miembro lo abre y adivina. Un recomendador es…
Building an Open Turkish EV Charging Intent Dataset
Electric-vehicle assistants rarely have just one job. A short Turkish question may ask for a nearby station, a…
Three Times I Measured Nothing
Builder Journal · Mars Environmental Dynamics Analyzer (MEDA) Virtual Sensor Recovery Ten times in a row I predicted…
RAG vs. Semantic Layer: Why AI Needs Deterministic Governance
Half the market is arguing about whether RAG or a semantic layer is the right foundation for enterprise…
From Learning Machine Learning to Competing on Kaggle: My First End-to-End Playground Competition Journey
How I applied Exploratory Data Analysis, Feature Engineering, Pipelines, and Ensemble Models to solve a real-world machine learning…
My trading system has a 73.5% win rate and loses money. Here is the diagnostic that found it.
I spent a few days auditing a live FX system I built, over 16 years of history. The…
Bootstrapped Data Products — Here’s What I Learned
I’m Heshan. I build data products. No VC, no team — just me, a lot of Playwright scripts,…
# How I Built a Retail Demand Forecasting App with Python and Streamlit
By Okparaji Wisdom | Data Scientist | Nigeria Retailers in Nigeria lose millions of naira every year to…
How I Batch-Process 100K Rows with LLMs Without Losing My Mind (or My Money)
I had a 158,000-row product catalog. Each row: a free-text description. I needed structured attributes out of it:…
