Aditya Dandia

@adityand

ML engineer in progress. Building from scratch.

Bengaluru, IndiaJoined March 2026

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A learner building ML algorithms from scratch to actually understand what's happening under the hood. Writing about the math, the mistakes, and the process and not just the results.

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Aditya Dandia's blogs

ML from Scratchadityand.hashnode.dev17 posts

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ADAditya Dandiaadityand.hashnode.devApr 27 · 5 min read

Episode 17: Phase 6: Final Evaluation & Series Finale

Act 1 — The Full Picture Five phases in, eight models trained, one question left: which model do you actually deploy, and can it explain its decisions? The full comparison table tells the first part o

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ADAditya Dandiaadityand.hashnode.devApr 26 · 3 min read

Episode 16: Phase 5: LightGBM Didn't Win the Way I Expected. It Won Differently.

Act 1 — The Setup Phase 4 ended with LR + SMOTE as the model to beat. Churn recall of 0.80. ROC-AUC of 0.839. A logistic regression — the simplest model in the toolkit — holding the top spot after fou

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ADAditya Dandiaadityand.hashnode.devApr 26 · 3 min read

Episode 15 — Phase 4: Class Imbalance

Act 1 — The Problem With Getting 81% Right Phase 3 ended with an uncomfortable truth. Logistic Regression scored 81% accuracy and an ROC-AUC of 0.842. On paper, that looks good. But it was missing 44%

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ADAditya Dandiaadityand.hashnode.devApr 26 · 6 min read

Episode 14: Phase 3: Baseline Models

Title: I Ran Three Baseline Models on Churn Data. The Simplest One Won. Act 1 — The Setup Phase 2 left me with a clean preprocessing pipeline. A ColumnTransformer that handles three feature types, a

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ADAditya Dandiaadityand.hashnode.devApr 26 · 3 min read

Episode 13: Phase 2: The Preprocessing Pipeline

Act 1 — The Problem With Raw Data Raw data is a mess. Strings where there should be numbers. Categories with three possible values mixed alongside categories with seven. Numerical features on complete

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Aditya Dandia

About

Available for

Aditya Dandia's blogs

Recently published

Episode 17: Phase 6: Final Evaluation & Series Finale

Episode 16: Phase 5: LightGBM Didn't Win the Way I Expected. It Won Differently.

Episode 15 — Phase 4: Class Imbalance

Episode 14: Phase 3: Baseline Models

Episode 13: Phase 2: The Preprocessing Pipeline

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Aditya Dandia

About

Available for

Aditya Dandia's blogs

Recently published

Episode 17: Phase 6: Final Evaluation & Series Finale

Episode 16: Phase 5: LightGBM Didn't Win the Way I Expected. It Won Differently.

Episode 15 — Phase 4: Class Imbalance

Episode 14: Phase 3: Baseline Models

Episode 13: Phase 2: The Preprocessing Pipeline