Senior Software Engineer

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**Senior Software Engineer

Wikimedia Foundation, Remote**

The Wikimedia Foundation is looking for a Senior Software Engineer to join the MediaWiki Platform team. MediaWiki is the open-source platform that powers Wikipedia and its sister projects - impacting hundreds of millions of Wikipedia users across the globe.

You will be responsible for:

*🌸*Designing, improving, and maintaining key parts of the MediaWiki stack;

*🌸*Driving technical quality and operational excellence by defining and reinforcing standards in testing, observability, and system reliability;

*🌸*Comfortably and autonomously creating proofs of concept, writing design documents, and breaking down complex projects into actionable tasks to support less experienced team members;

*🌸*Developing and improving shared capabilities (e.g., authentication, caching, rate limiting) that enable other teams to build efficiently and consistently;

*🌸*Championing key product metrics by focusing on measurable outcomes that guide our decisions and help us to evaluate success;

*🌸*Leading by example in code review, decision-making, and team culture - fostering transparency, empathy, and collaboration;

*🌸*Improving and automating processes for identifying, tracking, and resolving production issues;

Qualities we are looking for:

*💦*Clear communicator: You explain complex ideas simply and foster shared understanding across engineering, product, and non-technical audiences;

*💦*Outcome-oriented: You prioritize work that delivers value to users and aligns with organizational goals. You balance ideal solutions with the constraints of scale, legacy, and user expectations;

*💦*Accountable: You own your work end-to-end and help establish a culture of responsibility and follow-through;

*💦*Candid and respectful: You offer feedback directly, constructively, and with care - and invite the same in return. You support growth by challenging ideas, not people;

*💦*Collaborative leadership:You inspire trust and progress through support, example, and thoughtful contributions.

Requirements:

*💦*Commitment to the Foundation's Mission and Values;

*💦*Extensive experience in backend software engineering;

*💦*Familiarity with platform or infrastructure products that serve internal or external engineering teams;

*💦*Experience with databases and event streams, including schema design, query optimization, and efficient data access patterns;

*💦*Deep understanding of software architecture, testing methodologies, and system design;

*💦*Strong experience in observability practices: setting up metrics, logging, monitoring, and alerting;

*💦*Familiarity with incident response, root cause analysis, and follow-up processes;

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