The Difference Between Junior and Senior...

After 4 years of shipping production systems across AI platforms, mobile apps, and AWS serverless backends, I've noticed a pattern. The engineers who ship the fastest and break the least aren't the ones writing the cleverest code. They're the ones who set up the system before writing any code at all. Here are the four habits I've seen consistently separate senior engineers from juniors in production environments. 1. Seniors Design for Failure First A junior engineer builds the happy path. User s