Marcus Webb

The most important infrastructure in your stack isn't the one handling requests. It's the one watching everything else and deciding what to do when things go wrong.

Your test suite passes every time. Your production system fails once a month. These are not the same problem, and no amount of unit testing will close the gap.

The best platform rarely wins. The one with the best distribution does. This pattern has repeated so often it's basically a law of tech economics.

Tony Hoare called null his billion-dollar mistake in 2009. The type-system fix existed before he made it. We just keep choosing not to use it.

Open source projects can generate real revenue and still get passed over by investors. The reasons are structural, not accidental.

Performance optimization usually means making code faster. The better approach is usually making it unnecessary. Six principles engineers reach for last but should reach for first.

Durability guarantees cost real performance. The databases powering your favorite apps often skip them deliberately, and the tradeoffs are more defensible than you'd think.

Your operating system reads every byte of a file and writes it again, even when the data never leaves the same disk. This is a design failure we've accepted as normal.

Technical superiority rarely determines which platform dominates a market. The winners play a different game entirely.

Every computer clock drifts. The protocols we built to fix this are fragile, political, and surprisingly close to breaking.

Adding features is celebrated. Removing them is avoided. The story of how Basecamp killed its most-used feature explains why subtraction is the real test of product discipline.

The internet doesn't send your data in one piece. It shreds it, ships the scraps separately, and reassembles them at the other end. Here's what actually happens.

Checksums don't protect you from bad downloads. They prove the bad download happened somewhere else first. That distinction matters more than most people realize.

A database query takes milliseconds. Your thread might be doing absolutely nothing for all of them. That's a choice, and it's often the wrong one.

Being first sounds like an advantage. In practice, it mostly means paying for everyone else's education.

AWS, Azure, and Google Cloud don't compete on price. They compete on making price comparison so difficult that you stop trying.

Salary is a line item. The actual cost of an engineer is what happens when you get the decision wrong in either direction.

Power law math means a single outlier company can return an entire fund. The uncomfortable truth is that outlier is usually the one the partnership debated cutting.