Pay attention! This is my personal point of view as an atheist, not what all the atheist community think. I don't know what others think about death.
Last Saturday my cousin, what I mostly consider a mentor, died during a car crash. This made me think about my position toward the concept of death; being an atheist I've never actually cared so much about it, but now I think there are two different moments to take, when an atheist is speaking of death.
THINKING OF HIS /HER OWN DEATH IS EASIER FOR AN ATHEIST
As I said, being an atheist I've never cared about death in the past. And this is still true. When it concern me. Now, I'm a Lawful Good kind of person, but still thinking that for me Death ust means not existing anymore, also mean I have to be afraid of nothing. I am a good and loyal person because I choose to be, because I do not want others to suffer because of me, and not because God would punish me with hell if I do not act like this.
What I'm saying is: as an atheist,whatever I do as no consequences rather than those on Earth.
THINKING OF SOMEONE ELSE'S DEATH IS HARDER FOR AN ATHEIST
This is the focal point of my take. My cousin is dead. That is something undeniable. But while a Catholic like my grandma can still think that he's watching us from above and that she will meets him once again in the future, for me, my cousin is just gone. He just finished existing. And now, as an atheist, I have to just accept the terrible idea that I will never be able to speak again to him for the rest of my life, until I will be dead as well.