About this role
Principal Software Engineer - Backend
India, Uttar Pradesh, Noida
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Job description
Company and benefits
Job number
200052122
Date posted
Sep 02, 2026
Work site
3 days / week in-office
Travel
Less than 25%
Profession
Software Engineering
Discipline
Software Engineering
Role type
Individual Contributor
Employment type
Full-Time
Overview
The Cosmic & M365 Deployments team at M365 Core IDC builds the hyperscale cloud infrastructure that powers Microsoft 365 services, including M365 Copilot, WorkIQ, IC3, and many other mission-critical experiences. Our mission is to enable teams across M365 to deliver innovation faster with the reliability, safety, and scale required by a global cloud platform.
At the core of our work is COSMIC, Microsoft's managed container platform for cloud services. We build and operate the platform at hyperscale, enabling thousands of Microsoft 365 services to innovate, deploy, and operate faster with built-in reliability, safety, and operational excellence.
Our team drives some of Microsoft's most complex infrastructure investments across deployments, capacity management, networking, storage, security, reliability, and efficiency, solving deep engineering challenges at global scale. We have also conceived and built foundational technologies including the COSMIC Linux Platform, M365 OneBranch Deployment Platform, SDP Infrastructure, and Policy Hub, now broadly adopted across the Experiences + Devices (E+D) organization.
Our culture is built on innovation, ownership, collaboration, and continuous learning, empowering engineers to solve hard problems, drive meaningful impact, and shape the future of Microsoft 365 infrastructure.
Why Join Now
We are entering the next phase of platform transformation, reimagining how cloud services are built, deployed, and operated through AI-first and agent-driven experiences. This is a unique opportunity to:
- Shape the future of autonomous and agentic cloud platforms.
- Build AI-powered infrastructure that accelerates engineering productivity and operational efficiency.
- Push the boundaries of deployment velocity, reliability, and safety at hyperscale.
- Solve complex distributed systems challenges that directly impact Microsoft's most critical services.
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
- Drive technical strategy, architecture, and execution for hyperscale cloud platform and deployment systems.
- Lead the design and delivery of large-scale infrastructure and platform investments.
- Build secure, scalable, reliable, and maintainable distributed systems.
- Influence engineering direction through architectural leadership and technical decision-making.
- Drive operational excellence through automation, observability, and reliability engineering.
- Ensure solutions meet the highest standards of security, privacy, compliance, accessibility, and service reliability.
- Mentor engineers and foster a culture of engineering excellence across teams.
- Partner across Microsoft to deliver business impact at global scale.
Qualifications
Required/Minimum Qualifications:
- Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering e