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ranjankchoubey/README.md

Hey there! I'm Ranjan 👋

Portfolio LinkedIn Email

Typing SVG

🚀 About Me

name: Ranjan Kumar Choubey
role: Data Engineer @ Deloitte (Client: Walmart)
location: Bengaluru, India
education:
  - M.Tech CS (Data Science) — ISI Kolkata (AIR 11, AIR 1 EWS)
  - B.Tech IT — BIT Sindri (CGPA 8.89, Rank 1)
currently_building:
  - Consumption layer pipelines in Spark-Scala for Walmart's enterprise data platform
  - Ingestion from 100+ SAP tables and Kafka brokers into GCS/BigQuery
  - Airflow DAGs with SLA monitoring & automated failure recovery
also_building:
  - Notebook App — AI-powered note-taking (app.ranjankchoubey.com)
  - PCGT — Graph Transformer research (M.Tech thesis)
teaching:
  - GATE DA Faculty at IMS Academy (Probability, Statistics, ML)
open_to: Data Engineer | ML Engineer | Software Engineer roles at product companies

🛠 Tech Stack

Python
Python		 Scala
Scala		 SQL
SQL		 TypeScript
TypeScript		 GCP
GCP		 Docker
Docker
React
React		 Next.js
Next.js		 FastAPI
FastAPI		 PyTorch
PyTorch		 Firebase
Firebase		 Linux
Linux

🏢 Experience

Data Engineer (Consultant) @ Deloitte (May 2025 – Present)

Client: Walmart — Enterprise Data Platform (Ingestion & Consumption Layer)

Data Science Intern @ Allstate India (May – Jul 2024)

Lead Engineer @ Tata Power (Sep 2022 – Aug 2023)

Graduate Engineer Trainee @ Tata Power (Aug 2021 – Sep 2022)

🔬 Projects & Research

Project Description Tech Link
PCGT Graph Transformer replacing O(N²) attention with partition-aware attention. Outperformed SGFormer on 10/12 benchmarks. PyTorch, PyG, METIS GitHub
Notebook App AI-powered note-taking app with rich editor, code blocks, math, drawing, PDF export. Next.js, React, Firebase, Gemini Live · GitHub

🎯 Key Highlights

🏗 100+ Tables
SAP & Kafka → BigQuery		 ⚡ Spark-Scala
Consumption layer owner		 🔄 Airflow DAGs
Production orchestration		 📈 AIR 11
ISI Kolkata M.Tech

📊 GitHub Stats

🤝 Let's Connect

Open to Data Engineer, ML Engineer, and Software Engineer roles at product companies.

Portfolio Notebook App

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