Understanding How Authenticator Apps Generate OTPs Offline
A practical walkthrough of how time-based OTPs actually work — shared secrets, HMAC-SHA1, dynamic truncation, and the 30-second window.
Blog
Writing about backend systems, infrastructure, and things I wish were better documented.
Observer Pattern with Python
A comprehensive guide to the Observer design pattern in Python, illustrated with a smart home example and full working code.
Strategy Pattern with Python
A practical guide to the Strategy design pattern in Python, using a payment processor as the running example.
About Redis
A brief overview of Redis as a key-value store and its supported data structures.
Getting Started with GitHub Actions
A hands-on intro to GitHub Actions: build a workflow that compiles a Python script to an exe and publishes it as a release artifact.
git tag
A quick reference on git tag — creating, listing, pushing, and the difference between lightweight and annotated tags.
How * and + Work in Regex
A clear explanation of the + and * quantifiers in regular expressions, with practical examples.
Movie Review: Requiem for a Dream
A reflection on addiction, pleasure, and consumerism through the lens of Darren Aronofsky's 2000 psychological drama.
Patch One: Recent Files Feature
Notes from my first GSoC patch — implementing the recent files feature for PDFDebugger and a lesson on Java's Preference API.
Code Has Begun
Coding has officially started at my GSoC project with Apache PDFBox — reflections on the first patches and plans for the summer.
My GSoC at PDFBox, Apache Foundation
An introduction to my Google Summer of Code project — improving the PDFDebugger tool for Apache PDFBox.