If you're a software developer just starting out and you've ever wondered how senior devs think while they build, this is for you.

Short summary

A senior developer shares a practical framework for junior devs to evaluate code before shipping: validate inputs on the backend, handle errors, think through edge cases, secure secrets, and distinguish auth from authorization. The key pattern: systematically move through layers (code → data → security → behavior → infrastructure → UX) before deploying.

• •Validate all user input on the backend, not just the browser—frontend validation is for UX, backend is for security
• •Think through edge cases: empty fields, huge inputs, double-clicks, slow networks, file size limits, mobile responsiveness
• •Follow a layered framework before shipping: code fundamentals → data safety → auth/security → product behavior → infrastructure → UX

Generated with AI, which can make mistakes.