Two Sigma / Beaker Notebook  (<a href="http://TwoSigma.com" > / <a href="http://BeakerNotebook.com" >)
Based in NYC.
Seeking front-end and full stack engineers to work on Beaker, the open source data science tool.  <a href="http://www.twosigma.com/careers/position/935.html" >
<a href="http://www.twosigma.com/careers/position/936.html" >
Two Sigma is hiring all types of scientists and engineers.
<a href="http://www.twosigma.com/careers.html" >
Ask HN: Who is hiring? (November 2014)