Summary
The Wikimedia Foundation is seeking a Senior Software Engineer to join the team supporting the Wikidata Platform — the structured data backbone of Wikimedia projects and a key part of the general open knowledge ecosystem. You’ll help scale and sustain the Wikidata Query Service (WDQS) and related platform services that power tools, features, communities, and research efforts across Wikimedia projects and beyond.
This role combines backend engineering and operations ownership. You’ll implement high-scale, production-grade services while ensuring performance, reliability, and maintainability. Working closely with the technical and product leads, you’ll contribute to shaping the future of how the world queries and interacts with structured, linked data.
Important : We are a fully remote team. Your working hours will need to overlap with UTC+1 to UTC-5 time zones to accommodate members of your team around the world. With 14:00 UTC to 17:00 UTC being the team's overlapping hours.
What You’ll Do
- Design, build,



and maintain backend systems and APIs that power Wikidata’s query infrastructure
- Improve reliability, observability, and automation of the Wikidata Query Service and data pipelines
- Integrate Wikidata Platform services with other systems and data sources across Wikimedia
- Collaborate with SRE, data engineers, and product teams to ensure stability and scalability under growing usage
- Monitor production systems, respond to operational incidents, and proactively identify and resolve bottlenecks
- Support platform migrations and system upgrades (e.g., triple stores, streaming ingestion)
- Contribute to deployment automation, CI/CD workflows, and service instrumentation
- Participate in code reviews, design discussions, and technical planning
- Document systems and share knowledge with team members and Wikimedia’s broader technical community

Skills and Experience We’re Looking For
- 5+ years of experience as a backend or platform engineer working on distri

📌 Senior Software Engineer (España)
🏢 Wikimedia Foundation
📍 España