New 
Principal Software Engineer
 Microsoft | |
 United States, Washington, Redmond | |
 Oct 11, 2025 | |
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OverviewMicrosoft's Path team empowers customers to move seamlessly from Idea Plan Done , delivering collaborative work management solutions across Microsoft Project, Planner, To Do, Whiteboard, and Visio. We are building the Future of Work by leveraging Large Language Models (LLMs) and Agentic AI to create intelligent, connected experiences that drive productivity across Microsoft 365.As part of this vision, we are transforming Microsoft Planner into a high-scale, unified work management platform. This foundational effort will eliminate complexity, streamline user experiences, and enable AI-driven productivity for millions of users worldwide.We are seeking a Principal Software Engineer to lead this transformation-designing and delivering core capabilities for a platform that operates at internet scale and integrates deeply with Microsoft 365 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.
ResponsibilitiesSolve complex challenges in distributed systems and help shape the vision for agentic, AI-powered work management.Architect and implement core features for the Task and Work Management platform. Ensure secure, high-quality product delivery, overseeing system architecture and code quality.Design robust APIs and object models to power new experiences across web, mobile, and Teams.Optimize, refactor, and debug code to ensure performance, maintainability, and ROI.Drive innovation in service deployment and reliability, minimizing manual intervention.Collaborate across Microsoft 365 teams (Teams, SharePoint, Exchange) to deliver cross-service integrations.Partner with Program Management to design, implement, test, and iterate on features that enable 10x growth in usage.Mentor engineers and Champion a Live Site culture, ensuring exceptional reliability and customer delight.Embody Microsoft's Culture and Values in all aspects of work. | |