How I Think About Secure Backend Development
Security is not a feature you bolt on after shipping. It is a mindset that shapes every decision from schema design to API responses.
Security starts at schema design
The most effective security decision I make happens before a single line of application code is written: how I design the database. Overly permissive columns, missing constraints, and storing sensitive data in plaintext are all decisions that create permanent attack surface. I treat schema design as a security decision.
Authentication is not just a middleware
Most Laravel tutorials show authentication as something you bolt onto routes with auth middleware and call it done. Real applications need more: token expiry, refresh rotation, session fixation prevention, and rate limiting on login endpoints. Every authentication surface is a potential foothold.
Authorisation deserves the same attention as authentication
Authenticated does not mean authorised. I have seen production applications where any logged-in user could access any other user's records simply by changing an ID in the URL. Laravel policies and gates make proper authorisation trivial. There is no excuse for skipping them.
Validate at every boundary
User input is malicious until proven otherwise. I validate at every entry point — HTTP requests, CLI commands, queue jobs — not just in controllers. Trusting data that originated outside your system is how SQL injection, mass assignment, and object injection bugs appear.
The principle of least privilege applies to your code too
Database users should only have the permissions they need. API clients should only see the data they need. Services should only talk to the parts of the system they need. Minimal surface area means fewer paths to exploitation.