Security by Design, Not Bolted On

Most security failures we see when reviewing existing systems don't come from a single exploited vulnerability. They come from decisions made early, before a single line of security-specific code was written, that made the eventual failure inevitable.

A common pattern: a system is built quickly to meet a deadline, with authentication, access control, and data handling treated as details to be sorted out once the core product 'works'. By the time security is addressed, it has to be retrofitted around business logic that was never designed to support it. The result is usually a patchwork of fixes rather than a coherent security posture.

Designing security in from the start doesn't mean slowing delivery down. It means asking a small set of questions before writing code: who should be able to access this data, what happens if this credential is compromised, what's the blast radius if this service fails. Answering those questions during architecture is far cheaper than answering them during an incident.

This is the approach we take on every system we build: security considered as part of the architecture conversation, not a separate phase that happens after the 'real' engineering is done.