Working really hard and meeting goals == helpful and generous. I'm sure at some point you had a roadblock on a piece of code and a co-worker helped you overcome it, or vice versa. Or you covered for someone that one day when his kid was sick so the team didn't fall behind it's timeline.

Being sociable and taking an interest in other people via hallway convos is also a good way to build connections and/or friendships, but that has nothing to do with my earlier comment.