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Wikimedia Deutschland – Gesellschaft zur Förderung Freien Wissens e. V. is a non-profit organisation based in Berlin, Germany. With 140 employees and about 74.000 members, it is the oldest and largest of about 40 independent chapters of the international Wikimedia movement. The most well-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 skilled Full Stack Developer (f/m/x) for short and long term contracting. Primarily you will work on Wikidata data quality.


Ideally you have:

  • At least 3 years of experience in the field, including but not limited to:
    • Fluency in OOP, SOLID & Clean Code principles
    • In-depth knowledge of PHP and its ecosystem
    • Excellent JavaScript skills, including advanced knowledge of Node.js and reactive frameworks (Vue preferred), may need to handle jQuery in legacy code, and their respective ecosystem
    • Able to set up, use and/or maintain a Full Stack development environment, including Docker, Jenkins, Travis CI and Github Actions
    • Extensive experience with professional git-based workflows required (includes versioning and reviewing of code using Gerrit, Github)
    • Comfortable working closely with stakeholders in iterations and responding to change
  • Prior knowledge of working with MediaWiki & extensions preferred
  • Quick learner with a passion for clean, well-tested and readable code (e.g. PHPUnit, Mocha, Jest)
  • Outstanding communicator with good time management skills and a heightened awareness of time and budget constraints

The work described above is to be performed entirely in a home office setting as a contractor. 

Temporal scope: 40 hours


Please apply by 15 of January 2021 with a cover letter & resume and stating your hourly rate.