Teal

Teal is a programming language for building complex cloud applications. It's a bit like the Go language, except that Teal is very tightly integrated with Amazon Web Services, making cloud functions look and feel just like normal functions.

Teal is well suited to building data processing systems. It works with Python so you can do the heavy-lifting with your favourite tools, and use Teal to connect them all together. It passes data between functions running on AWS Lambda, and synchronises state between them, so you don't have to do any manual data handling. It shows you how long each task takes, so you can optimise further.