Designing With Concepts

“Designing good software isn’t just about writing good code. It’s about thinking clearly about what the code represents.”

Stop Fighting Tests. Fix the Code Instead.

Many developers think that writing unit tests is tedious because of how tricky mocks, frameworks, or test setup can be.

A Pragmatic Take on the DRY(Don’t Repeat Yourself) Principle

“Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.”

Forget Defensive Programming: Make Illegal States Impossible

Stop sprinkling if-guards and start encoding your domain’s rules directly in the types.

Stop Confusing Layers of Abstraction with Separation of Concerns

Developers often treat “abstraction layers” and “separation of concerns” as interchangeable terms. But in software design, they represent…

What Causality Can Teach Us About Software Coupling

Most developers are taught to look for patterns in data — but patterns don’t always tell the whole story. Correlation can mislead. The…

What to Open, What to Close: A Pragmatic Guide to Interface Design

The playbook for building software seams that bend with change, not break.

Evolving in Two Dimensions: Interface Strategies for Real‑World Software(Expression Problem, Part…

Patterns that survive both behaviour and variant volatility

Stop the Cascade: How to Design Interfaces That Survive Change

The Expression Problem: A Design Dilemma

The Age of Transformers

Transformers, Attention and Self Attention

How To Be an Effective Leader

I must confess I have met very few effective leaders in over two decades in the software industry. I use the term effective purposely; not…

Multitenant Architecture — Tenant Modeling

I've had a few interesting conversations with folks regarding multitenant systems over the past few weeks. Those conversations prompted me…