This post was co-written with Mike DiScala. A scaling challenge Event sourcing is at the core of our data pipeline: each night we extract data from our client systems and construct an event log describing everything that happened within the data (e.g., a student was added, attendance was taken, grades were recorded). We…

At Panorama, we strongly believe in automated tests. No code gets deployed without passing both a thorough code review and a battery of thousands of automated tests, and no code makes it through code review without updating tests for the new features it’s adding. …

As Rails developers, we spend a fair amount of time in the Rails console, which is itself just the native Interactive Ruby Shell (IRB). By default, it’s not particularly pretty… $ rails c irb(main):001:0> def hello irb(main):002:1> puts “hello” irb(main):003:1> end => :hello irb(main):004:0> hello hello => nil irb(main):005:0> …but…