Technical Directory

Tech Insights & Engineering Articles

Explore technical articles, software architecture deep dives, clean code tutorials, and computer science explorations from my journey.

The Threat Modeling Mindset  (Seeing software the way reality sees it)

The Threat Modeling Mindset (Seeing software the way reality sees it)

The feature worked perfectly in testing.

Arun Pandian M
Feb 14, 2026
3 min read
Left Null Space — The Error Your Model Cannot Learn

Left Null Space — The Error Your Model Cannot Learn

At some point a model stops improving, but not in a dramatic way. The loss doesn’t blow up. It doesn’t fluctuate. It sim…

Arun Pandian M
Feb 10, 2026
4 min read
Orders as Categories — Why Comparison Matters More Than Sorting

Orders as Categories — Why Comparison Matters More Than Sorting

When we compare things in programming, we instinctively think about sorting:

Arun Pandian M
Feb 9, 2026
4 min read
Null Space: The Directions a Model Quietly Ignores

Null Space: The Directions a Model Quietly Ignores

When we learn linear algebra, we usually focus on what **changes the output**.But in real systems — especially in machin…

Arun Pandian M
Feb 7, 2026
3 min read
The Most Dangerous Bugs Don’t Look Like Security Bugs

The Most Dangerous Bugs Don’t Look Like Security Bugs

One of the worst production issues I’ve seen didn’t involve hacking, malware, or stolen passwords.The system did exactly…

Arun Pandian M
Feb 7, 2026
4 min read
What Are We Actually Protecting?  Understanding the CIA Triad in Real Software

What Are We Actually Protecting? Understanding the CIA Triad in Real Software

A few years ago, a team fixed a **security issue** by encrypting everything.

Arun Pandian M
Feb 7, 2026
4 min read
In-Place Slow–Fast Scan Pattern: Remove Duplicates from a Sorted Array

In-Place Slow–Fast Scan Pattern: Remove Duplicates from a Sorted Array

The **in-place Slow–Fast Scan pattern** is designed for problems where data must be processed or cleaned without allocat…

Arun Pandian M
Jan 26, 2026
5 min read
From Nothing to Arrows: Objects and Simple Graphs

From Nothing to Arrows: Objects and Simple Graphs

“Every complex system that works evolved from a simple system that worked.” — John Gall

Arun Pandian M
Jan 19, 2026
7 min read
Cybersecurity: Why It’s About Mindset, Not Tools

Cybersecurity: Why It’s About Mindset, Not Tools

Security doesn’t fail because encryption is weak. It fails because trust is misplaced.

Arun Pandian M
Jan 18, 2026
5 min read