Remote Senior Software Engineer, MediaWiki Interfaces

Feedinkoo; United States; Remote; USD 109,000 - 169,000; Full time

Job summary

Wikimedia Foundation is seeking a Senior Software Engineer to join the MediaWiki Interfaces team. Design and build critical parts of the MediaWiki stack, with a focus on the web API and integration interfaces used by Wikipedia and sister projects.

The role emphasizes code quality, observability, and scalable architecture while mentoring teammates. This fully remote position requires overlap across UTC+2 to UTC-7 time zones to coordinate with a global team.

Qualifications

• Extensive experience in software engineering, web platforms and open source.
• Proficient in PHP and JavaScript; strong HTTP knowledge.
• Deep understanding of software architecture, testing methodologies, and system design.
• Experience with observability, metrics, logging, monitoring, and incident response.
• Experience with CI/CD pipelines and automated test infrastructure.

Responsibilities

• Designing, developing, 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.
• Autonomously creating proofs of concept, writing design documents, and breaking down complex projects into actionable tasks.
• Contributing to API-first development and OpenAPI specification practices.
• Championing product metrics and instrumenting key user journeys to guide decisions.
• Leading by example in code review, decision-making, and team culture.

Skills

PHP

JavaScript

HTTP

System design

Observability

CI/CD

Incident response

Testing methodologies

Job description

Wikimedia Foundation is seeking a Senior Software Engineer to join the MediaWiki Interfaces team. Design and build critical parts of the MediaWiki stack, with a focus on the web API and integration interfaces used by Wikipedia and sister projects.

The role emphasizes code quality, observability, and scalable architecture while mentoring teammates. This fully remote position requires overlap across UTC+2 to UTC-7 time zones to coordinate with a global team.