Python at Zalando

Summary Open source has proven its value in many ways over the years. In many companies that value is purely in terms of consuming available projects and platforms. In this episode Zalando describes their recent move to creating and releasing a number of their internal projects as open source and how that has benefited their business. We also discussed how they are leveraging Python and a couple of the libraries that they have published. Brief Introduction Hello and welcome to Podcast.__init__, the podcast about Python and the people who make it great. I would like to thank everyone who has donated to the show. Your contributions help us make the show sustainable. For details on how to support the show you can visit our site at pythonpodcast.com Linode is sponsoring us this week. Check them out at linode.com/podcastinit and get a $20 credit to try out their fast and reliable Linux virtual servers for your next project Rollbar is also sponsoring us this week. Rollbar is a service for tracking and aggregating your application errors so that you can find and fix the bugs in your application before your users notice they exist. Use the link rollbar.com/podcastinit to get 90 days and 300,000 errors for free on their bootstrap plan. Hired has also returned as a sponsor this week. If you’re looking for a job as a developer or designer then Hired will bring the opportunities to you. Sign up at hired.com/podcastinit to double your signing bonus. Visit our site to subscribe to our show, sign up for our newsletter, read the show notes, and get in touch. To help other people find the show you can leave a review on iTunes, or Google Play Music, and tell your friends and co-workers Join our community! Visit discourse.pythonpodcast.com for your opportunity to find out about upcoming guests, suggest questions, and propose show ideas. Your hosts as usual are Tobias Macey and Chris Patti Today we’re interviewing Jie Bao and João Santos about their use of Python at Zalando Interview with Zalando Introductions How did you get introduced to Python? – Tobias Can you start by telling us a bit about what Zalando does and some of the technologies that you use? – Tobias What role does Python play in your environment? – Tobias Is the use of Python for a particular project governed by any particular operational guidelines or is it largely a matter of developer choice? – Tobias Given that you have such a variety of platforms to support, how do you architect your systems to keep them easy to maintain and reason about? – Tobias One of the projects that you have open sourced is Connexion. Can you explain a bit about what that is and what it is used for at Zalando? – Tobias What made you choose to standardize on Swagger/OpenAPI vs RAML or some of the other API standards? – Tobias Did Connexion start its life as open source or was it extracted from another project? – Tobias ExpAn is another one of your projects that is written in Python. What do you use that for? – Tobias Can you describe the internal implementation of ExpAn and what it takes to get it set up? – Tobias Given the potential complexity of and the need for statistical significance in the data for proper A/B testing, how did you design ExpAn to satisfy those requirements? – Tobias Given the laws in Germany around digital privacy, were there any special considerations that needed to be made in the collection strategy for the data that gets used in ExpAn? – Tobias Keep In Touch João Twitter Jie Twitter Laurie Twitter Picks Tobias Hacker’s Keyboard Jie Shah of Shahs by Ryszard Kapuściński João Serendipity Laurie Flow) The intro and outro music is from Requiem for a Fish The Freak Fandango Orchestra / CC BY-SA