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As a **Senior Software Engineer - Copilot Extensibility** on the Copilot Extensibility Platform, you will play a key role in designing and building systems that empower developers and partners to extend Microsoft Copilot. You’ll write C# code to develop scalable services that form the backbone of our extensibility platform, contributing both to the core infrastructure and to co-development efforts with partner teams across Microsoft.

This role places you at the center of Microsoft’s AI innovation. You’ll work closely with teams across the company, gaining a deep, end-to-end understanding of how Copilot integrates into Microsoft 365 and other products. The work is fast-paced, highly collaborative, and strategically important, offering the opportunity to influence the direction of a platform that is transforming how people work. Success in this role requires reliable technical skills, a collaborative mindset, and the ability to thrive in a dynamic, competitive environment.

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.

Responsibilities

+ Works with appropriate stakeholders to determine user requirements for a set of features.

+ Contributes to the identification of dependencies, and the development of design documents for a product area with little oversight.

+ Creates and implements code for a product, service, or feature, reusing code as applicable.

+ Contributes to efforts to break down larger work items into smaller work items and provides estimation.

+ Acts as a Designated Responsible Individual (DRI) working on-call to monitor system/product feature/service for degradation, downtime, or interruptions and gains approval to restore system/product/service for simple problems.

+ Remains current in skills by investing time and effort into staying abreast of current developments that will improve the availability, reliability, efficiency, observability, and performance of products while also driving consistency in monitoring and operations at scale.

Qualifications

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.

+ 2+ experience with C#, Azure Platform experience, such as Service Bus, Cosmos database (DB), Redis, or related technologies.

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 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.

+ Experience with user facing AI products.

+ Demonstrated track record of collaboration on products at scale.

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 $158,400 - $258,000 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-pay

Microsoft will accept applications for the role until October 31, 2025.

\#M365Core

Microsoft is an equal opportunity employer. Consistent with applicable law, 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 and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations (https://careers.microsoft.com/v2/global/en/accessibility.html) .