Building Security-First Architecture from Day One.

Three weeks into my last SaaS project, I discovered we'd been storing user passwords in plain text. Not hashed, not encrypted—plain text. The worst part? I wrote that code. I knew better, but I thought "I'll add proper security later." That moment taught me something crucial: there is no "later" in security. I spent the next two days scrambling to implement bcrypt hashing, invalidating all existing sessions, and sending embarrassing "please reset your password" emails to our beta users. The fix took 12 hours. Had I done it right from the start? Twenty minutes. The Security-Later Trap Here's what nobody tells you when you're starting a SaaS project: adding security after you've built features takes three to four times longer than building with security from the beginning. I've learned this the hard way, more than once. Most developers fall into the same pattern. You're excited about your product idea. You want to ship fast. You think "let's just get the authentication working, we'll har