pGraph Consultant (Freelance)

Wikimedia Foundation, Remote (fully)

Job Description

Type: Contract Duration: 5 months Hours: 40 hours/week Summary The Wikimedia Foundation is looking for a Graph Engineer Consultant to support our team, reporting to the Engineering Manager, Search Platform. As the Graph Engineer Consultant, you will be responsible for defining a transition strategy for migrating Wikidata Query Service (WDQS) from Blazegraph to a different RDF store and executing this transition. Your work will include understanding and documenting the current state, its limitations and the needs of a future solution in accordance with the needs of the Wikidata community and the engineering constraints identified. You are responsible for: Documenting the criteria that will be used to evaluate alternative RDF stores to replace our use of Blazegraph. Listing and reviewing potential alternate solutions in light of the criteria defined above. Experimenting with the most promising solutions to validate decisions. Time permitting, implementing a new version of WDQS based on an alternate RDF store. Skills and Experience: Strong familiarity with Graph databases and / or RDF stores Proven track record of analyzing complex processes and advising on strategy Experience working with large-scale services Qualities that are important to us: Comfortable making trade-off decisions Commitment to diversity, equity, and inclusion Additionally, we’d love it if you have: Direct experience working with Wikidata Query Service Understanding of the free culture, free software, or online rights movements About the Wikimedia Foundation The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and the other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge, and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects, build software experiences for reading, contributing, and sharing Wikimedia content, support the volunteer communities and partners who make Wikimedia possible, and advocate for policies that enable Wikimedia and free knowledge to thrive.  The Wikimedia Foundation is a charitable, not-for-profit organization that relies on donations. We receive donations from millions of individuals around the world, with an average donation of about $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics. If you are a qualified applicant requiring assistance or an accommodation to complete any step of the application process due to a disability, you may contact us at or (415) 839-6885.


Remote (fully)

Minimum Experience

Strong familiarity with Graph databases and / or RDF stores



October 31st, 2021

Salary Range

NGN Depends on location