I wouldn't call myself an "expert" in any particular thing. I know quite a bit about a few things, and a fair bit about a bunch of things. The trick is knowing that, and to always be driven to learn more.
Currently I'm a Senior Software Engineer at Basho Technologies. We develop the Riak distributed database and RiakCS.
While I learn erlang and our core I'm focussed on our client libraries; I'm currently the owner of the Java Riak Client and contributor to others, as well as the cat herder for client development overall.
If you actually want to know more about me, visit my about me page.
Q&A for professional and enthusiast programmers
Q&A for computer enthusiasts and power users
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for professional programmers interested in conceptual questions about software development
Q&A for power users of Apple hardware and software
Q&A for contractors and serious DIYers
Q&A for professional and amateur chefs
Q&A for Information security professionals
Q&A for scientific skepticism
Q&A for passionate videogamers on all platforms
Q&A for database professionals who wish to improve their database skills and learn from others in the community