Junior Software Engineer (all genders) - Wikibase Reuse

Free knowledge leads to a fairer world. Wikipedia is the most important online knowledge collection of our time. The German Wikipedia alone records almost 1 billion page views per month for a total of 3 million articles. We – Wikimedia Deutschland e. V. – support the volunteers of Wikipedia and its sister projects, develop free software, such as Wikidata, and advocate for free access to knowledge, the opening of education and research, and more common good orientation in data policy.

For our Software Engineering Team, based in Berlin, we are looking for a permanent Junior Software Engineer (all genders) – Wikibase Reuse, full‑time or part‑time (30 – 40 hours / week), starting 01.01.2026 or sooner.

This position is designed as a hybrid working model with at least quarterly presence in our Berlin office.

About the position & the team

You will be working with the team that develops and improves the software behind the Wikidata project. Wikidata is a free and open knowledge graph that can be read and edited by both humans and machines and is a part of the Linked Open Data Network. Wikidata has the clear goal of giving more people more access to more knowledge and you will be part of that!

What you’ll be doing

You will be developing open source software products which enable Reuse of Wikidata data in applications, data visualizations, research, etc. Existing Reuse products include robust web APIs and data dumps for offline processing.

Among your tasks there will be the following:

• You’ll be building and maintaining the functionality of Wikibase Reuse products, collaborating with the team on finding the best solution to user problems.
• You’ll be taking active part in all the stages of software development, and engage in code and design reviews providing constructive feedback.
• You’ll be shaping how your team works, e.g. by improving the team processes and agile practices.

What makes you right for this role

• You are passionate and care about software development.
• You have initial experience in a modern programming paradigm and language. We primarily write object‑oriented PHP and JavaScript but experience with these is not required.
• You have an eye for software design and quality. We are interested to hear about your experience with automated tests.
• You like working in a team working towards a common goal, learning together, and supporting and lifting up your peers.
• You are not afraid of making mistakes, you want to keep learning and developing yourself.
• You are passionate about Wikimedia’s mission and want to make an impact towards our goal of giving more people more access to free knowledge.
• You are able to communicate in English with professional proficiency.

Interested?

Please send us your detailed application documents (Resume & Motivational Letter (yes, we read them)) via our job portal. We kindly ask you to refrain from application photos and information on date of birth, marital status and parents.

Wikimedia Germany is committed to equal opportunities and does not discriminate on the basis of, for example, ethnic origin, citizenship, religion or belief, political or other convictions, gender, age, disability, or sexual identity. We would like to address you in the way which feels most comfortable for you so please share your preferred name and pronouns if you wish.