Senior Software Engineer

The Intelligent Conversation and Communication Cloud (IC3) powers billions of real-time conversations across Microsoft Teams, Dynamics 365, and Azure Communication Services. The IC3 Data Platform team builds globally distributed data infrastructure supporting analytics, service reliability, business intelligence, and AI-powered experiences.

Our Universal Counter System (UCS) is a large-scale, multi-tenant streaming platform that transforms high-volume event streams into near-real-time counters for protection, reliability, and M365 product scenarios. UCS processes millions of events per second while supporting large-scale state management, low-latency serving, exactly-once processing, regional resiliency, and strong platform governance.

We are seeking a Senior Software Engineer to build the next generation of UCS and the IC3 streaming platform. The engineer will apply large-scale, real-time data processing expertise to deliver reliable, high-performance services that support growing traffic and evolving customer needs.

Responsibilities include making architectural decisions spanning distributed systems, data processing, identity, privacy, compliance, reliability, and multi-tenant design; writing and reviewing production code; establishing engineering and operational standards; and guiding solutions from design through operation. Collaboration with engineering, product, security, compliance, and infrastructure teams will resolve ambiguous requirements and deliver scalable solutions.

The role will also advance AI-assisted engineering while maintaining human review, automated testing, security, and production-quality standards, mentoring engineers, and influencing technical direction across Microsoft organizational boundaries.

This position is based in Redmond, Washington and requires the employee be in the office a minimum of 3 days per week.

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.

• Lead the design and development of the Universal Counter System (UCS), a large-scale, self-service real-time streaming solution for event ingestion, stateful processing, near-real-time aggregation, low-latency serving, observability, and governance.

• Drive innovation by leveraging Microsoft Azure, AI technologies, and open-source frameworks such as Flink and Spark to modernize data platforms and enable next-generation communication experiences.

• Advance AI-native software development through coding agents, agentic workflows, and harness engineering.

• Drive cross-team technical alignment by partnering with engineering and product teams across Microsoft to define requirements and deliver trusted, end-to-end data solutions.

• 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.

Preferred Qualifications: