Senior Software Engineer, Cloud Platform

Microsoft • Redmond, WA

1d

About The Position

The Senior Software Engineer, Cloud Platform will work on Microsoft 365’s Substrate Unified Routing Fabric, which optimizes network access to backend servers for Microsoft 365 applications. The team operates a high-scale distributed service routing tens of trillions of requests per day and moving petabytes of data across user-to-service and service-to-service communications.

The role focuses on Nanoproxy, a lightweight, high-performance native proxy intended to replace legacy IIS-based solutions and support a microservices-based cloud architecture. Through the M365 Integrated Routing Architecture (MIRA), the team handles traffic for workloads such as Teams and SharePoint Online, with an emphasis on routing, resilience, and security. The engineer will design and implement features for Microsoft 365 scenarios, including Copilot, and help build distributed, highly available, resilient systems.

The position is part of an M365 DevOps team responsible for the service lifecycle, including planning, design, implementation, delivery, and monitoring. It includes daytime on-call duties. The engineer will also contribute to technical excellence through architecture design, code reviews, and mentoring early-career engineers.

Requirements

• Bachelor’s degree in Computer Science or a related technical field and 4+ years of technical engineering experience coding in languages such as C, C++, or C#, or equivalent experience.
• Ability to meet Microsoft, customer, and/or government security screening requirements, including passing the Microsoft Cloud Background Check upon hire or transfer and every two years thereafter.

Nice To Haves

• Master’s degree in Computer Science or a related technical field and 6+ years of technical engineering experience coding in languages such as C, C++, or C#, or equivalent experience.
• Bachelor’s degree in Computer Science or a related technical field and 8+ years of technical engineering experience coding in languages such as C, C++, or C#, or equivalent experience.
• Experience in networking, security, or proxy-related services.
• Experience working with large-scale distributed systems.

Responsibilities

• Use appropriate AI tools and practices across the software development lifecycle in a disciplined manner, take responsibility for AI-generated requirements, designs, code, and other assets, and help team members do the same.
• Experiment with AI tools and practices to improve personal capabilities.
• Design and implement Nanoproxy features for Microsoft 365 scenarios, including Copilot.
• Build distributed, highly available, and resilient systems.
• Work with services spanning thousands of servers, tens of billions of transactions, and hundreds of millions of users.
• Promote technical excellence through code reviews, architecture design, and mentoring early-in-profession engineers.
• Contribute to service planning, design, implementation, delivery, and monitoring as part of the M365 DevOps team.
• Participate in daytime on-call duties.

What This Job Offers

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