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Wikimedia Deutschland – Gesellschaft zur Förderung Freien Wissens e. V. is a non-profit organisation based in Berlin, Germany. With more than 100 employees and about 65.000 members, it is the oldest and largest of 37 independent chapters of the international Wikimedia movement. The best-known Wikimedia project, the free online encyclopedia Wikipedia, is used by millions of people across the world every day and is continuously updated and improved by millions of users.

Wikimedia Deutschland furthers these ideals even beyond the free encyclopedia: It is our aim to establish and promote the creation, collection, and distribution of free knowledge in all parts of society. Our objective is to create a world in which the sum of all human knowledge is freely accessible for everyone. The main focus of our activities is the support of volunteers, the development of technology and software, and the cooperation with cultural and scientific institutions. Furthermore, we advocate on both the national and EU-level a legal framework which allows for free knowledge to become part of our everyday life.

We are looking for a Software Developer to join one of our agile development teams in our office at the heart of Berlin. You will either be working on the software behind the Wikidata project or on the software that powers our fundraising application and possible cross-department projects.

About you

  • You care about software; you have a passion which you can clearly convey by your actions rather than personal statements on your CV alone
  • You have an eye for software design and quality
  • You can recognize legacy code and know how to effectively deal with it
  • You are able to communicate fluently in English in a multidisciplinary team
  • For you it’s more than a job

We’re interested in candidates from any background, as long as you have a solid understanding of Object Oriented languages and basic experience with web development.

What we are offering you

  • We have internal presentations by our developers on topics they are enthusiastic about
  • You can attend local user groups during work time and you are encouraged to do so
  • You will have a noticeable impact on one of the top four visited websites in the world
  • We regularly go to conferences, both as attendees and participants

Our development teams are cross-functional, self-organizing and highly autonomous. No single team leaders or middle management. You’ll be working directly with the product owner. Among other things, testing, refactoring, and pair programming are encouraged. We’re constantly trying to improve the way we work.

All software we develop is Open Source, and we contribute back to various projects we use. Many of our components are published in a format that allows reuse outside of our own projects.

You can fill this position as permanent employee or as contractor.

Technologies we use

Most of our server side code is written in PHP. A lot of our projects have a HTML 5 & JavaScript frontend, which interact with server side backends via web APIs. We test our code with PHPUnit and QUnit, and with browser tests written in Ruby. Some of our code is written on top of the MediaWiki framework, some of it is entirely in-house and for newer projects we use libraries such as Symfony components and Doctrine.

An (incomplete) list of technologies we're currently using:

  • JavaScript, PHP, Ruby
  • MediaWiki, several MediaWiki extensions
  • PHPUnit, QUnit, Selenium, Cucumber, PHPCS, PHPMD, JSLint, Rubocop
  • Git
  • MySQL, SQLite
  • Composer
  • TravisCI, ScrutinizerCI, Jenkins
  • Wikimedia Labs infrastructure
  • Phabricator
  • Linux server, nginx
  • Puppet, Vagrant