Senior Software Engineer - HW/SW in Fleet Infrastructure

Microsoft • Redmond, WA

1d

About The Position

The Operating Systems and Server team within Microsoft 365 Core Platform improves the reliability, security, compliance, and operational health of the infrastructure that powers Microsoft 365 services worldwide. The team builds systems and automation for operating system lifecycle management, firmware health, security and patch freshness, vulnerability remediation, fleet compliance, and safe deployment of platform updates across hyperscale infrastructure.

The Senior Software Engineer designs, builds, and operates large-scale distributed systems that analyze fleet telemetry, identify security and freshness risks, and drive automated remediation across Microsoft 365 infrastructure. The work spans cloud engineering, operating systems, firmware, security, data platforms, and AI-assisted operations, in partnership with security, hardware and firmware engineering, Azure infrastructure and Fleet management teams, service owners, and site reliability engineers.

The role also encompasses management of a dedicated engineering lab used to validate server platforms, deployment processes, operating system changes, and firmware updates before production. Lab responsibilities include inventory, capacity planning, hardware installation and retirement, configuration consistency, test readiness, and documentation. The engineer will help ensure the lab is representative, reliable, secure, and available for engineering validation, and will configure and troubleshoot networking components and dependencies. Success requires diagnosing problems across server, firmware, operating system, deployment, and network layers and driving them through resolution.

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++, C#, Java, JavaScript, or Python, 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.
• In-depth knowledge of operating system internals, with strong expertise in Windows and practical experience with Linux, including debugging and troubleshooting kernels, drivers, system services, networking stacks, crash dumps, and performance issues.
• Experience collecting, correlating, and analyzing diagnostic data at scale, including event logs, traces, performance counters, networking telemetry, driver diagnostics, and other system-level signals to identify root cause and drive remediation.

Nice To Haves

• Master's degree in Computer Science or a related technical field and 3+ years of technical engineering experience coding in languages such as C, C++, C#, Java, JavaScript, or Python, or equivalent experience.
• Bachelor's degree in Computer Science or a related technical field and 5+ years of technical engineering experience coding in languages such as C, C++, C#, Java, JavaScript, or Python, or equivalent experience.
• Experience building or leveraging pipelines that aggregate and analyze diagnostic data, such as Kusto/Azure Data Explorer or similar, to identify root cause, detect systemic issues, and drive remediation across the Microsoft 365 fleet.

Responsibilities

• Design and build large-scale distributed services that improve operating system, firmware, security, and patch freshness across Microsoft 365 infrastructure.
• Develop telemetry, analytics, and reporting platforms to measure fleet compliance, update readiness, vulnerability exposure, firmware health, and remediation progress.
• Build intelligent services to detect freshness gaps, identify at-risk infrastructure, prioritize remediation, and forecast fleet security or compliance risk.
• Create safe automation workflows for operating system updates, firmware upgrades, security patch deployment, configuration enforcement, and remediation orchestration.
• Partner with security, hardware, firmware, operating system, and infrastructure teams to define and execute data-driven strategies for improving fleet health and reducing exposure.
• Build AI-assisted experiences that accelerate investigation of patching failures, firmware issues, configuration drift, vulnerability exposure, and live-site incidents.
• Improve operational safety through staged rollout systems, health gates, rollback mechanisms, policy enforcement, and strong observability.
• Manage lab infrastructure, including servers, top-of-rack switches, load balancers, and inventory.
• Manage lab server inventory, capacity planning, hardware installation and retirement, configuration consistency, test readiness, and documentation.
• Configure and troubleshoot lab networking infrastructure, including top-of-rack switches, VLANs, load balancers, virtual IP addresses, routing, addressing, connectivity, and related network dependencies.
• Participate in architecture reviews, code reviews, design discussions, and live-site operations.
• Mentor engineers and contribute to engineering excellence across the organization.
• Drive projects from concept and design through production deployment, measurement, and operational ownership.

What This Job Offers

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