OverviewMicrosoft Copilot is transforming productivity across Microsoft 365 by bringing AI-powered experiences to Word, Excel, PowerPoint, and other Office applications. We are seeking a Senior Software Engineer to improve the performance, scalability, and architecture of Office web applications. You will work across large codebases to optimize startup time, responsiveness, and overall customer experience, using profiling, telemetry, experimentation, and modern engineering practices.This role requires strong technical leadership and the ability to leverage agentic AI to accelerate engineering work, including system analysis, implementation, testing, debugging, and large-scale code improvements, while maintaining high standards for quality, security, and performance. 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.ResponsibilitiesDrive performance, scalability, and architectural improvements across Office web applications.Identify and resolve performance issues using telemetry, profiling, and experimentation.Lead complex cross-team engineering initiatives and technical design efforts.Apply agentic AI to accelerate development, testing, debugging, and code modernization.Partner across Microsoft to deliver high-impact customer experiences.Establish engineering practices that improve quality, reliability, and performance.Mentor engineers and contribute to technical excellence across the organization.Participate in on-call support and drive resolution of production issues.QualificationsRequired 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 PythonOR equivalent experience.Other Requirements:Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.Preferred Qualifications:Master's degree with 6+ years of software engineering experience, or equivalent experience.Experience leading complex, cross-team engineering initiatives and driving technical decisions.Experience improving performance, scalability, and reliability of large-scale web applications.Experience modernizing large codebases through architectural improvements, refactoring, and performance optimization.Demonstrated ability to effectively leverage agentic AI for software development, code transformation, testing, debugging, and engineering productivity.. Software Engineering IC4 - The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year. Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:https://careers.microsoft.com/us/en/us-corporate-payThis 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.