Every banker knows she only has 100 days to build a reputation. In your first 100 days, you must rack up the wins and prove that you were worth the investment. Yep, same in software engineering.
It's a bit gross to think about, but your manager is definitely going around and asking everybody what they think of you.
Writing good code won't be good enough on its own. Talk to colleagues, especially those outside of the engineering team. Understand what their problems are and how you can help. Focus on projects small enough to deliver benefits.
If you build a solid reputation in the first 100 days, you'll find the rest of your time much easier.
(Don't forget, every time you are promoted, you'll need to do this again.)