Senior Software Engineer - M365 Core

Microsoft • Redmond, WA

11h

About The Position

We are the Store Team within Microsoft’s Substrate Storage Fabric—the core platform that fuels Microsoft 365 experiences, from the latest AI-powered Copilot innovations to Outlook and Teams, etc. Our team delivers ultra-low latency data access at massive scale.
We are looking for a Senior Software Engineer to design, evolve, and modernize the core systems that power Copilot. If you’re passionate about building ultra‑low‑latency, high‑throughput services that run on a global scale, this role gives you the opportunity to shape one of Microsoft’s most strategic products.
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 4+ 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 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.
• Demonstrated experience at the Senior level for at least 2 years, with clear ownership of architecture, design decisions, and technical direction across multiple workstreams.
• On-call experience supporting production-grade, highly available systems serving millions of users.
• Expert-level proficiency in C# and/or RUST.

Responsibilities

• Designs, manages and modernizes our technology stack leveraging expertise in building and optimizing latency-critical applications using C# and RUST.
• Plays a pivotal role in managing, implementing and scaling systems that demand high performance and low latency.
• Leads efforts to continuously improve code performance, testability, maintainability, effectiveness, and cost, while learning about and accounting for relevant trade-offs.
• Acts as DRI and leads on-call operations, ensuring system health and rapid incident response across product lines.
• Proactively seeks new knowledge and adapts to new trends, technical solutions, and patterns that will improve the availability, reliability, efficiency, observability, and performance of products.
• Embody our culture and values.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level