I thought this was really useful in getting a quick overview of a variety of systems in the real world, even though the book itself is designed to answer interview questions. https://www.amazon.com/System-Design-Interview-Insiders-Guid...

The market rewards being good at job searching and interviewing. It makes a bigger impact on compensation than actual engineering value.

So get better at interviewing.

If you're already focused on coding, the next piece is systems design.

The more senior the job, the more likely part of the interview process is moving boxes and arrows around to design a scalable, reliable system.

This book is a great place to start: https://www.amazon.com/System-Design-Interview-Insiders-Guid...