In addition to everything else here, I've found you make friends at work quickly if you tackle long-lived concerns or pain-points (for individuals or teams) that haven't gotten enough attention

Filling gaps in tooling, fixing bugs in the product that some people have been making noise about but haven't been prioritized by management, solving inter-team friction by finding a middle ground that everyone can live with, giving non-technical stakeholders a sympathetic ear inside the engineering team, etc.

Find something that's been ruining someone's day over and over, and make it stop doing that. Instantly positive professional relationship.