You know those bugs, like, those. Where the application state dances around you like a crazed Polynesian fire dancer. Where changing the sorting order of a search in London reverts the result list back to Paris… Seriously? Unfortunately, a lot of us are specialists in dealing with this kind of bug.

Learn how we managed to move fast and create a new Symfony application without breaking our old legacy session handling. We write to our legacy session (which is file based) from our new project which uses PDO as the session storage.

Here at trivago we write a huge number of log messages every day that need to be stored and monitored. To handle all these messages we created Gollum, a tool that enables us to conveniently send messages from multiple sources to different services.

Learn how we introduced webpack to build our JavaScript assets. One of the main challenges was to run both Assetic and webpack in parallel for some time, in order to run tests and to make sure nothing was broken. This was achieved without any code or configuration duplication by developing a custom webpack loader.

For our expandation in the middle east area with our platforms in Israel and United Arab Emirates we had a particularly interesting problem to solve: How do we flip the layout of our page? Your favorite hotel search, trivago, is already available in countries as different as Mexico, South Korea and New Zealand. We are continuously opening new platforms worldwide.