Chandan Sahu

Chandan Sahu

analytics_engineer({'sql', 'python', 'dbt', 'power_bi'})

Building production data pipelines, dimensional warehouses, and executive BI dashboards. 500K+ transactions processed. Decisions backed by numbers, not vibes.

// medallion architecture · live pipeline

RAW

ingest

BRZ

bronze

SLV

silver

GLD

gold

dashboard

500K+transactions

71DAX measures

3prod pipelines

28dbt tests

Selected Work

Portfolio Projects

All projects

Featured

Payment Transaction Analytics Platform

End-to-end analytics warehouse processing 500K payment transactions, 12K customers, and 600 merchants. Built on medallion architecture (Bronze → Silver → Gold) with incremental ingestion, dbt schema tests, Prefect orchestration, and a 7-page Power BI executive dashboard.

Impact → ~₹3.4Bn GMV tracked · ~3.5% fraud rate · ~92.6% transaction success rate

Python dbt Core Prefect Docker PostgreSQL Power BI GitHub Actions

View on GitHub

Analytics

End-to-End Retail Analytics Platform

Retail data warehouse on the Olist Brazilian E-Commerce dataset (9 relational source tables) using DuckDB and dbt Core. Dimensional modeling across staging, intermediate, and mart layers with dbt schema tests.

Analytics → Cohort retention · RFM NTILE(5) · A/B z-score in pure SQL · Conversion funnels · ROAS/CPA attribution

Python dbt Core DuckDB Power BI pytest GitHub Actions

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Operations

Food Delivery Operations Analytics

Full operations analytics study of SLA breaches, delivery patterns, and peak-day performance. Identified critical operational bottlenecks through deep SQL analysis backed by a multi-page Power BI dashboard.

Finding → 29.83% overall SLA breach rate · 100% breach rate on festival days

Python PostgreSQL SQL Power BI

View on GitHub

Background

I'm a B.Tech Information Technology graduate from Bhilai Institute of Technology, Durg, specializing in end-to-end analytics engineering - from raw ingestion to executive dashboards.

My focus is production-grade data systems: medallion architectures, dbt transformations, Prefect orchestration, Dockerized pipelines, and CI/CD - not one-off notebook analyses. I've built warehouses processing 500K+ transactions with dimensional modeling, data quality tests, and business-facing BI layers.

Tools & Technologies

Query & Transform

SQL Python dbt Core Pandas NumPy

Visualization & BI

Power BI DAX Excel

Data Engineering

Prefect Docker GitHub Actions CI/CD

Databases & Architecture

PostgreSQL DuckDB Medallion Architecture Star Schema

YouTube Channel

Chandan Sahu

@ChandanKSahu

NO VIBES. JUST DATA.

I study products, businesses, and markets purely through data - breaking down real companies and trends with evidence, not speculation. Every video is quantified, reproducible, and built on actual numbers.

Watch on YouTube

Portfolio Projects

Payment Transaction Analytics Platform

End-to-End Retail Analytics Platform

Food Delivery Operations Analytics

Background

Tools & Technologies

YouTube Channel

Get in Touch