I'd like to know who he was, what he worked on, etc... The tweet is too vague.
And this is not to be consisted a full bio by any means, but here are the highlights. Andy Gross was Co-creator of Riak and Webmachine, Chief Architect @ Basho. Formerly @ Mochi, Apple, Akamai, a noted speaker, and lover of cats.
It's totally reasonable to ask why you should care about a particular strangers death in a world where 150,000 people die every single day.
If you truly don't care just move on. If you want to know more, it doesn't take a great deal of skill to use Twitter, GitHub, Google, and more to find out all that you want to know.