Principal Software Engineer

Microsoft Corporation•Redmond, WA

28d

About The Position

Microsoft 365 Copilot is a groundbreaking productivity tool thatâ leveragesâ the power of large language models, user data, Microsoft Graph, and the web to drive unparalleled creativity and productivity. At the heart of this innovation is the Enterprise Sydney, Assistant, and Intelligence (MSAI) team which designs and manages the central infrastructure that is the foundation of all the other copilots like Microsoft 365 Chat, Word, PowerPoint, and an expanding list of partners across Microsoft. Our team is responsible for managing the platform for experimentation, debugging and creating a self serve platform for all partners. We are looking for a Principal Individual Confidential to help us deliver the next generation of Copilot. As a Principal Software Engineer, you will be responsible for designing, developing, and delivering innovative software applications. You will work on coding, debugging, testing, and troubleshooting throughout the application development process. You will have the opportunity to work on challenging projects, collaborate with talented colleagues, and shape the future of technology at our company. In this role, you will be expected to have a deep understanding of software development principles and be able to apply them to create high-quality software. You will work closely with other team members to ensure that our software meets the needs of our users and is delivered on time and within budget. You will have the opportunity to grow your skills and take on new challenges within the company. Join us and help us build the next generation of software applications. 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. How We Do It Inner Loop Debugging:â Validate end-to-end without waiting for SDF or MSIT-debug in a live, always working system. Shadow Experimentation:â Run WW (word wide) experiments with LLM (Large Language Model) based metricsâ before a single check-in, collapsing inner and outer loops. Nexus Pulse:â A real-time health graph that makes livesite investigation effortless. 3D Agents:â Autonomous agents that diagnose and remediate incidents-no human in the loop. Build & Flight Certification:â Full fidelity validation on real traffic with LLM metrics before exposure. Nexus Hub:â A single control plane for partners to integrate, certify, and ship with confidence. Search Agility:â Extend these primitives to relevance so improving ranking is as easy as writing code. If you want toâ design systems that redefine how fast AI can learn and ship-while making reliability a built-in property, not an afterthought-join us. 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.

Requirements

Bachelor'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 equivalent experience.
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.

Nice To Haves

Master'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 Bachelor's Degree in Computer Science or related technical field AND 12+ 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 LLM-based systems, agent frameworks, or having a strong desire to learn.
Familiarity with Microsoft's Copilot ecosystem.
Prior work on developer platforms, extensibility models, or runtime isolation.
Customer obsession and passion for shipping high quality products.

Responsibilities

Design and implement scalable, reliable, maintainable services.
Demonstrate strategic understanding of the timing and rationale for design choices, within the scope of work.
Consistently contribute key ideas to the product or service design and vision that meets the customer's needs.
Drive design reviews across the team and apply expertise in available technologies.
Apply metrics to drive the quality and stability of code.
Have a sense of pride, commitment, and personal accountability for the service quality, completeness and resulting user experience for the life of the product or service.
Work closely with geographically distributed team, including Product Managers and developers, to drive key improvements in backend Engineering System.

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