[oliyoung]

It's not about the code (most juniors code better than me) but become senior is thinking _beyond_ code, thinking about mentoring and supporting co-workers, how your work impacts the business' greater goals and strategies, how you can positively impact culture organisation wide, the ability to ask questions, how you take responsibility, how you're inquisitive.

[Graffur]

I would expect senior engineers to write better code than junior engineers.

[oliyoung]

depends on your definition of "better"