> a sufficiently complex consumer or enterprise app winds up having big performance problems if people don't know what they're doing w.r.t. the code they write and how they connect systems together with that code.
On those complex systems in particular the problems start long before any code is written.
A software engineer can create and understand the specs, requirements, design the system, architectural decisions, define everything about that software and data, model everything, failure, performance, operational topics, documents everything, etc. before a single line of code is written, and of course they can write good code. Then there are the coders who patch together chunks of code from Stack Overflow or whatever boilerplate they have in the company's repository. I know every coder likes to call themselves a "software engineer" but there's a world of difference between the two types.
For the first group code was never the hardest part. For the second group there was never any other part.
On those complex systems in particular the problems start long before any code is written.
A software engineer can create and understand the specs, requirements, design the system, architectural decisions, define everything about that software and data, model everything, failure, performance, operational topics, documents everything, etc. before a single line of code is written, and of course they can write good code. Then there are the coders who patch together chunks of code from Stack Overflow or whatever boilerplate they have in the company's repository. I know every coder likes to call themselves a "software engineer" but there's a world of difference between the two types.
For the first group code was never the hardest part. For the second group there was never any other part.