First time stumbling across Beaker Notebook. Looks great! Recently heard about Jupyter[1][2], which is a project to generalize the IPython backend to be language agnostic. Are the various Two Sigma financial services entities using Beaker internally? Seems like a natural fit for the highly mathematical nature of the work Two Sigma staff and entities are engaged in.
Interesting tweet from one of the IPython/Jupyter devs[3] last year about Beaker. Jupyter and Beaker state similar missions, although Beaker seems to have focused more on "multiple languages within a single notebook" leveraging the IPython backend. Sounds like the two projects can both co-exist due to the slightly different emphasis influencing each project's trajectory.