Hackers Know Your Code Better Than You Do

Every application you ship is an attack surface - a collection of decisions that an adversary will probe with patience you do not have. Secure coding is not a specialty you add later; it is a reflex you build now, before the breach notification email gets written. You will learn the specific habits, mental models, and technical defenses that separate code that survives contact with the real internet from code that becomes a cautionary tale.