Senior Software Engineer

Responsibilities

• Design and deliver improvements to Wikipedia’s wikitext processing infrastructure while balancing user experience, performance, backward compatibility, and maintainability.
• Develop new features collaboratively with engineers, product managers, designers, client teams, and community members.
• Write PHP and JavaScript supporting hundreds of world languages.
• Create and maintain internet APIs using server scripting languages.
• Instrument components to monitor feature and quality characteristics.
• Use caching and persistence technologies.
• Own complex technical projects from problem definition through implementation and delivery, including architectural decisions.
• Mentor engineers and raise team technical quality through code reviews, design discussions, documentation, or direct mentorship.

Requirements

• At least five years of related professional software engineering experience.
• Experience with parser generators, interpreters, language runtimes, compilers, or taking language features through a product cycle.
• Experience designing and maintaining reliable, performant software used by other teams, products, or large user populations.
• Ability to own complex technical projects, resolve dependencies, navigate ambiguity, and work with limited direction.
• Strong unit and integration testing practices and ability to address security and code review feedback.
• Ability to collaborate effectively across team and organizational boundaries and communicate clearly in synchronous and asynchronous channels.
• Experience mentoring other engineers.
• Bachelor’s, master’s, or doctorate degree in computer science, software engineering, or another STEM field, or equivalent certification.
• Familiarity with HTML5 and DOM manipulation is preferred.
• Expertise in Node.js and related technologies is preferred.
• Familiarity with Wikipedia, wikitext, Markdown, MediaWiki, Drupal, WordPress, or other content management systems is preferred.
• Open source contribution experience is preferred.

Benefits

• Fully remote, remote-first work environment with occasional travel for team, department, or organization events.
• Preferred candidate timezone range is GMT-4 to GMT+2.
• Work authorization and hiring are available only in the listed U.S. states, territories, and countries; non-U.S. employees are hired through a local Employer of Record.
• U.S. benefits and perks are provided, with additional benefits information available through the Wikimedia Foundation.
• Work-life balance, inclusive culture, and equal opportunity employment practices.