We are seeking a Senior Software Engineer to design, build, and maintain a modern, high‑performance web browser on macOS. This role focuses on developing and improving browser functionality within a large, complex codebase, contributing to open‑source browser platforms, and delivering a reliable, performant, and high‑quality client experience on Apple platforms.

You will work on widely used browser software that impacts millions of users, solving challenging engineering problems across performance, reliability, and platform integration. This role offers opportunities to grow deep technical expertise within a global engineering organization while contributing to high‑quality, user‑facing software.

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Starting January 26, 2026, Microsoft AI (MAI) employees who live within a 50- mile commute of a designated Microsoft office in the U.S. or 25-mile commute of a non-U.S., country-specific location are expected to work from the office at least four days per week. This expectation is subject to local law and may vary by jurisdiction.

• Design, implement, test, and maintain software components for a desktop web browser on macOS.
• Contribute to browser functionality in large-scale, open-source codebases (e.g., Chromium-based architectures).
• Improve browser stability, performance, reliability, and maintainability through solid engineering practices.
• Diagnose and resolve complex issues related to rendering, browser processes, performance, and platform integration.
• Participate in technical design discussions and code reviews, upholding high standards for code quality and system design.
• Collaborate with engineers, program managers, and quality partners across teams.
• Contribute to automated testing, diagnostics, and continuous improvement of engineering workflows.

Required Qualifications:

• Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• 4+ years of professional software development experience with large, complex codebases.
• Solid fundamentals in software design, data structures, algorithms, and system architecture.
• Experience developing client applications on macOS.
• Familiarity with web browser architectures, rendering engines, or Chromium‑based projects.

Preferred Qualifications:

• Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
  • OR equivalent experience.
• 5+ years of professional software development experience with large, complex codebases.
• Experience with performance analysis, crash diagnostics, and reliability engineering for client software.
• Experience using modern developer tools, including AI‑assisted coding and debugging tools, to improve productivity and code quality; ability to critically evaluate AI‑generated output.
• Exposure to modern engineering workflows such as CI/CD pipelines and automated testing.
• Software Design & Systems Thinking: Ability to design and maintain modular, maintainable components within large, complex systems
• Problem Solving & Debugging: Proven experience diagnosing and resolving complex issues in production-quality codebases
• Engineering Excellence: Strong commitment to code quality, testing, performance, and reliability
• Collaboration & Communication: Effective technical collaboration in cross‑functional and globally distributed teams
• Ownership & Accountability: Ability to take problems from definition through implementation, validation, and ongoing improvement

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.