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Technology keeps getting better and better which, at some point, makes us think "Should I migrate to the latest version/technology or not?" Well when you decide to use a better technology for your application, you have to also consider rewriting the code that your application runs on. The business logic remains the same in most of the cases but the data model would definitely change if you are switching from SQL to some NoSQL Technology for example.

trivago engineering is excited and looking forward to welcoming Kyle Simpson to the spectacular new trivago Campus.

Kyle will give a 5-day JavaScript workshop starting on the 6th of August, 2018. While the workshop is primarily for trivago employees, we want to share this special occasion with the community as well. Therefore, we have reserved three spots for JavaScript enthusiasts who share our love for open source projects.

Imagine a world without open source software. Pretty scary, isn't it?

There would be no free operating systems that let you take full control of your computer.

Almost six months ago, our team started the journey to replicate some of our data stored in on-premise MySQL machines to AWS. This included over a billion records stored in multiple tables. The new system had to be responsive enough to transfer any new incoming data from the MySQL database to AWS with minimal latency.

For a long time, we've mentioned that we're running our own JavaScript framework: Melody. Today, we are happy to share the framework we've been using since 2016 as an Open Source project with you. We designed Melody to be fast, memory efficient and to be flexible enough for the future.

On the 11th of November 2017 trivago hosted a Hackathon at NASDAQ's MarketSite in New York. The winners were awarded with a trip to Europe to visit trivago's offices as well as conference tickets for The Next Web, Amsterdam. We invited the winners to our office where we got the chance to interview them about their Hackathon experience.

Exciting times were ahead of us, but as a wise man once said: great power carries great responsibility.

There we were, facing what could be a once-in-a-lifetime chance to build an app from bottom up. But how could we exceed the expectations of so many users with the first release on day 1?

Back in April 2015, I felt the need to do some work and earn money besides my studies in Computer Science at the University of Düsseldorf. After doing some research and crawling a few job platforms, I finally applied for a job in IT-Support at trivago. The job offer looked very appealing and life at trivago promised to be fun.

As we all adventure around this space that we call the Internet, consuming content is often on our minds. Naturally with the vast amount of data, filtering out what’s not interesting is a huge time saver. In order to help you find your ideal hotel at the best price, trivago’s filters are one of the best ways to do so. Sadly, some visitors couldn’t even access them due to poor accessibility and performance.

Hackathons! That’s where you feel super excited about creating something interesting, or useful, or just entertaining. They are a great way to encourage creativity and teamwork. Recently, trivago hosted a Python Hackathon in collaboration with the Python Usergroup Düsseldorf. The event was a full success!

If you’ve never heard about Memcached, it is simply a high-performance, distributed memory caching system which uses a key-value store for strings and objects. Usually, it serves for saving data originally retrieved from a database or external services. As simple as it is, it can improve the performance of your website quite a bit. The API of Memcached is very simple and accessible from most of modern programming languages. A simple example:

We do think that our tech blog is full of interesting things powered by our engineers' great stories. Let me take you on a journey of how we maintain the trivago tech blog from the technical perspective and how we recently automated its deployment process.

We all have been there, done that. You want to build an API that allows you to manipulate your entities so you start checking which specification to use. Maybe REST or JSON API or maybe no specification.

At trivago, we use a Cucumber based framework for end-to-end tests of our most important web applications. Cucumber stores test result as JSON files which can be turned into human-readable test reports.

We're a data-driven company. At trivago we love measuring everything. Collecting metrics and making decisions based on them comes naturally to all our engineers. This workflow also applies to performance, which is key to succeed in the modern Internet.