My intern presentation @Mozilla
It's been a pleasure working as part of the Automation and Tools team at Mozilla this summer (make sure you check Mozilla's great university program).
I worked on a couple of projects, but the main one involved switching a legacy testing infrastructure to structured logs (instead of the previously used mash of formatted strings parsed by regular expressions).
You can watch the presentation to get all the pro-tips to avoid the pitfalls of refactoring continuous integration code (and more!):
(the presentation can also be viewed on air mozilla)