Senior Software Engineer

Team Purpose

Cloud operations are entering a new era. The next generation of infrastructure will not bemanagedone workflow at a time, but through autonomous systems that can reason, plan, act, and learn across Microsoft's largest Kubernetes fleets. COSMIC is building that future, and this role will help create the agentic infrastructure that makes it real.

The COSMIC team, part of the M365 Substrate Core organization, has a bold mission to standardize how we deliver services and build a modern Kubernetes-based compute fabric with turn-key geo-presence, security, high availability, fault isolation, and automated cloud build out. COSMIC is a strategic investment to modernize ourcomputeplatform and improve the agility, security, compliance, reliability, and cost efficiency of services across Microsoft.

As cloud fleets continue to grow in size and complexity, operating them increasingly requires more than traditional automation.We believe the future lies in intelligent systems that help engineers move from managing infrastructure directly to defining goals, policies, and operational intent, while the platform handles routine decision-making and execution safely at scale.

Job Purpose

We are seeking a Senior Software Engineer to build autonomous operational capabilities for COSMIC.

This teamis responsible forthe agentic infrastructure, intelligent operational systems, and learning capabilities that help engineers manage cloud services atfleetscale. Its mission is to make the safe path the fast path foroperatingmodern cloud services by combining scalable agent systems, operational intelligence, and continuous learning.

In this role, you will ownsignificant featuresand services that enable AI agents to reasonabout, coordinate, and execute operational workflows safely and efficiently. You will take problems from design through production, building capabilities for deployment, capacity, resiliency, recovery, optimization, evaluation, and continuous learning across Microsoft's largest Kubernetes fleets.

You will work with product managers, architects, and engineers across COSMIC to turn operational needs into reliable platform experiences. You will be expected tooperatewith substantial autonomy, make sound design decisions, deliver high-quality code, use production signals to improve the system, and help other engineers succeed through technical leadership and example.

Microsoft's mission is to empower every person and every organization on the planet to achieve more. Asemployeeswe 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.

• Own the design, implementation, rollout, and operation of significant autonomous operations features and services within COSMIC.

• Build platform components that enable AI agents to reason, coordinate, and safely execute operational workflows at fleet scale.

• Develop intelligent capabilities for deployment, capacity, resiliency, recovery, optimization, and other operational scenarios.

• Implement clear safety boundaries, policy checks, observability, rollback, and human oversight for agentic actions in production environments.

• Design and implement sandbox isolation, controlled production access, and blast-radiuscontainmentso autonomous actionsremainbounded and safe.

• Build evaluation, experimentation, feedback, and learning loops that improve system quality and operational effectiveness over time.

• Translate customer and operational requirements into well-designed, testable, maintainable software and measurable success criteria.

• Partner with engineers, product managers, and architects across COSMIC to resolve dependencies and deliver end-to-end scenarios.

• Investigate complex production issues, use telemetry and data toidentifyroot causes, and deliver durable fixes that improve reliability.

• Lead feature-level technical reviews, contribute to architecture and roadmap decisions, and mentor engineers through design and code reviews.

• Improve engineering practices, reusable patterns, and operational tooling so the team can move faster without lowering the bar for safety or quality.

• 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.

Other Requirements:

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.