PROD-Fix the Junior Mistakes MuleSoft in 15 Pages

I wrote down the 12 mistakes that keep MuleSoft developers stuck at "Junior" level.

When I started, I thought my job was just to make the flow work. I didn't worry about timeouts or memory limits until production crashed at 3 AM.

The difference between a Junior and a Senior isn't how fast you code. It's knowing what NOT to do.

I created this handwritten "Cheat Code" guide to remind myself of the safe alternatives. It covers the exact stuff that fails in the real world. I will keep on adding to this Thread.

If you can master these "Safety First" rules and understand the Core DataWeave operators on Page 1, you are already ahead of 90% of applicants.