Technical Writing

Backend Engineering Blog

Deep dives into Node.js, REST API design, JWT security, machine learning, and clean backend architecture — written by a B.Tech CSE student at University of Delhi.

Node.js MongoDB WebSockets

How I Built a Real-Time Expense Splitting App with Node.js & MongoDB

Architecture decisions, Socket.IO real-time sync, the net-settlement algorithm, and UPI QR generation behind PerSplit — a production Flutter + Node.js app.

5 min read Read

REST API Architecture Express.js

Designing Scalable REST APIs as a B.Tech CSE Student

Versioning, pagination, error standards, rate limiting, and clean controller-service-repository separation — patterns I use in every Express.js backend.

6 min read Read

JWT Auth Security

Implementing JWT Authentication in Production Node.js Systems

Access tokens, refresh token rotation, blacklisting with Redis, and secure cookie storage — the complete auth flow I implemented in PerSplit.

7 min read Read

Machine Learning Python TF-IDF

Fake News Detection Using TF-IDF and Machine Learning

Training a Gradient Boosting ensemble on 44K news articles with TF-IDF feature extraction to achieve 99.48% accuracy and sub-second CPU inference.

6 min read Read

Clean Architecture SOLID Node.js

Building Backend Systems with Clean Architecture in Node.js

Layered architecture, dependency injection, and SOLID principles applied to Node.js/Express — how I structure services for maintainability and testability.

6 min read Read