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Any Developer. Any App. Any Platform.

Within the Developer Division, the Languages, Runtimes, and Compilers Group at Microsoft is responsible for best-in-class support for C++, Java, .NET (C#, Visual Basic, and F#), Python, Rust, and Go. Developer Division in CoreAI, believes software development is rapidly evolving in the age of Artificial Intelligence. We are building the future of platforms and tools for this new era—and we are looking for developers who are not only early adopters of AI-powered development tools, but who are also actively exploring how large language models (LLMs) can enhance their effectiveness and impact.

Be a part of a team that values collaboration and the idea of working better together. Come to help us define the language, optimize the compiler and runtime, and build tooling that empowers developers worldwide to build great software.

The .NET Core Runtime’s Codegen/JIT team is looking for a **Senior Software Engineer - Compiler** who shares a passion for system programming, compiler development, and deeply understanding developer expectations. As a member of the .NET Codegen team, you will work on optimizing the Just-In-Time (JIT) compiler that powers millions of .NET applications, with a focus on performance, diagnostics, and support for evolving hardware platforms.

Microsoft Culture

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

+ Lead the design and optimization of the .NET JIT compiler, including code generation, register allocation, and performance tuning across multiple architectures and hardware platforms.

+ Proactively identify and deliver innovative features that advance compiler technology and developer tooling for new architectures, platforms, and developer scenarios.

+ Collaborate with peer teams, customers, and hardware partners to ensure compiler solutions address business needs effectively.

+ Own complex technical problems in foundational areas that will affect Languages, Runtimes, and Compilers to target new platforms or provide new experiences.

+ Demonstrate strong written communication skills by authoring clear, comprehensive technical specifications, design documents, and architecture proposals for compiler features and system enhancements.

+ Integrate AI-assisted tools (e.g., GitHub Copilot) to improve productivity, code quality, and developer experience, including prototyping AI-driven improvements to tooling, diagnostics, or compiler optimizations with large language models as needed.

+ Mentor and guide junior engineers, fostering technical growth and best practices.

+ Foster open-source discussions, code reviews, and community forums to gather feedback and share expertise.

+ Design and build the .NET compiler directly improving developer satisfaction by delivering high quality and performant experiences.

+ Design, implement, debug, and deliver experiences primarily in C++ and C.

+ Wants to be part of a motivated and collaborative engineering team.

+ MS Culture & Values: Embody our Culture (https://www.microsoft.com/en-us/about/corporate-values) and Values (https://careers.microsoft.com/us/en/culture) .

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#, OR/ and Java

+ OR equivalent experience.

+ 4+ years of industry experience developing compiler technologies

+ 6+ months of experience using AI-assisted development tools (e.g., GitHub Copilot, or similar) to enhance productivity and code quality

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.

+ 5+ years of experience working on programming language design, compilers, managed runtimes, or OS internals

+ 1+ years of experience using AI-assisted development tools (e.g., GitHub Copilot, or similar) to enhance productivity and code quality

+ 1+ years of experience applying AI technologies (such as large language models or code generation tools) in software development workflows, including tasks like static analysis, automated documentation, or test generation

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 posts positions for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

\#CoreAI

\#DDJL

\#DevDiv

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) .