Software Engineer, Principal Jobs

Join Microsoft's Windows team in Hyderabad as a Principal Software Engineer. Lead high-caliber teams in modern app development using C/C++ and XAML/WinUI to revolutionize the Windows experience. This role requires 10+ years of coding expertise and a passion for building software at scale. Shape t...

Lead a team tackling core infrastructure and scale challenges for OneDrive & SharePoint in Dublin. This role requires expertise in high-volume cloud services (C#, Java, Python) and a commitment to mentoring developers. You'll drive innovation, solve complex engineering problems, and shape the fut...

Join Microsoft's AI organization as a Principal Backend Software Engineer. Develop next-generation shopping capabilities for Copilot and Browsers using your expertise in high-throughput systems. This role in Redmond requires 8+ years of experience with C++, C#, Java, or Python. Lead design, mento...

Join Microsoft's CoreAI team to build the AI infrastructure powering Azure's innovation. As a Principal Software Engineer, you'll develop scalable training systems for frontier LLMs and agentic models. This role requires 6+ years of coding experience in C++, Python, or similar. Collaborate in a f...

Lead the platform powering Xbox experiences across all devices. As a Principal Software Engineering Lead, you'll guide a team in Redmond, building core capabilities with React, TypeScript, and cloud services. Drive innovation in application hosting, release systems, and multi-platform development...

Lead the development of next-gen financial applications in Galway. This Principal Engineer role requires 8+ years' expertise in Java, Spring Boot, and Angular, with strong AWS and microservices knowledge. Drive technical excellence, mentor a high-performing team, and enjoy a competitive bonus. EU...

Join Tripadvisor's Kraków team as a Principal Software Engineer - Mobile. Lead the architecture of scalable native apps for iOS/Android in a hybrid role. Drive technical strategy, mentor teams, and release features daily. Enjoy competitive compensation, travel perks, and flexible work.

Lead the modernization of critical healthcare applications as a Senior Principal Software Engineer. This hands-on technical role requires deep .NET, SQL Server, and legacy system expertise to drive architecture and unblock teams. Enjoy a remote-first culture with comprehensive benefits while shap...

Seeking a Principal Software Engineer with Top Secret/SCI clearance to support the Air Force's C3BM Division and ABMS program. This role requires 20+ years of DoD experience, full lifecycle software development expertise, and IAT Level II certification. Join us in Bedford to develop resilient bat...

Lead the 1ES team at Microsoft CoreAI, building foundational platforms for the next generation of AI-powered software. You will own system architecture, establish engineering best practices, and guide teams in Redmond. Requires 8+ years of coding experience and a passion for enabling world-class ...

Join Microsoft's AI team in Beijing as a Principal Software Engineer. Design and develop the intelligent core of the MSN content ecosystem platform. Leverage your expertise in scalable systems and AI to empower creators through data analytics and automation. This role requires strong coding skill...

Lead the design of Azure's hyperscale storage resiliency systems as a Principal Software Engineer. You will develop fault prediction, self-healing automation, and repair workflows for millions of SSD nodes. This role requires deep expertise in SSD firmware, NVMe, and large-scale reliability engin...

Lead the future of AI infrastructure at Microsoft Core AI in Redmond. Design and build high-scale distributed services for AzureML, powering next-gen LLMs like GPT-5. Requires 6+ years of coding experience and 3+ years in systems for large model training. Develop in C#/Go/Rust on Kubernetes to so...

Lead the architecture for innovative Surface app experiences at Microsoft's Redmond HQ. As a Principal Software Engineer, you'll define technical vision, mentor teams, and build high-quality software for millions. Requires 6+ years in C++/C# and a passion for hardware-software integration. Enjoy ...

Lead the Azure Core platform's capacity evolution as a Principal Engineering Manager in Belgrade. Drive technical strategy and oversee complex engineering solutions using C++, C#, or Python. This role requires a Bachelor's degree and 12+ years of coding experience to shape the foundation of Micro...

Lead the future of security as a Principal Software Engineer at Microsoft in Redmond. Design and architect complex cloud solutions for the Microsoft Security platform, using your expertise in C#, Java, or Python. This role requires a Bachelor's degree, 6+ years of coding experience, and a passion...

Join Microsoft's Business & Industry Copilots group as a Principal Software Engineer in Redmond. Drive AI innovation within the Copilot Studio team, designing and delivering cutting-edge SaaS applications. Leverage your 6+ years of coding expertise in C#, Java, Python, or similar to build and opt...

Lead the innovation of Bing's search growth and monetization in Beijing. As a Principal Software Engineer, you'll architect full-stack solutions, from AI-driven features to data pipelines, using JavaScript/TypeScript and modern AI. Drive impactful projects, analyze experiments, and shape the futu...

Lead the embedded software strategy for cutting-edge 3D printers as a Principal Engineer in Somerville. You will architect scalable systems in C/C++, solve complex hardware-software challenges, and define the technical roadmap. This senior role requires deep expertise in shipping complex hardware...

Lead AI-native security innovation at Microsoft in Redmond. As a Principal Software Engineer, you'll provide technical leadership, improve AI tools across the SDLC, and establish best practices. Requires a Bachelor's degree plus 6+ years of coding experience in C, C++, C#, Java, JavaScript, or Py...