I Built a Medical SaaS With AI. Then I Got Hacked. Here's the Case Study.

Thu, 23 Apr 2026 00:00:00 +0000

The first night I deployed my sister’s medical scheduling system to production, I went to bed feeling like a king. By 9am the next morning, my server’s CPU was pinned at 300%, and someone else was mining cryptocurrency on my rented hardware.

That’s the middle of the story, though. Let me back up.

This is a case study about the SaaS I always wanted to build, the one that finally found me, and everything I broke and learned getting it to work. It’s also the story of a Product Designer who thought he understood software, and discovered the internet is a much stranger, more hostile place than any Figma file ever suggested.

Safeguards for Destructive Actions: Positive Friction

Mon, 01 Jan 0001 00:00:00 +0000

info Quick Definition

Safeguards are intentional friction mechanisms designed to prevent a user from performing irreversible actions (deleting, formatting, closing an account, or removing critical data) accidentally or impulsively. In this case, friction is an ally of the user experience.

The Power of Positive Friction

In standard interface design, we seek to remove any obstacles or friction that slows down the user. However, for destructive actions, friction is humanly necessary. Without it, a single mistaken click could erase years of user work. A good safeguard forces the brain to switch from automatic mode (“System 1”) to analytical and conscious mode (“System 2”).

Security on Fernando Ruiz

I Built a Medical SaaS With AI. Then I Got Hacked. Here's the Case Study.

Safeguards for Destructive Actions: Positive Friction

The Power of Positive Friction