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Principal Software Engineer Jobs

721 Job Offers

Principal Software Engineer - System Optimization
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Lead AI performance optimization for OpenAI models at Microsoft. Drive inference efficiency across NVIDIA, AMD, and custom silicon in large-scale production. This senior role requires deep C++/Python expertise and offers technical leadership in a collaborative, cutting-edge environment.
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United States , Mountain View
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Engineer Software
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Lead the development of next-gen network security components for cutting-edge firewalls at Palo Alto Networks. This Bengaluru-based role requires 10+ years of C programming expertise on Unix/Linux, deep knowledge of TCP/IP, DPDK, and L2-L4 protocols. Architect scalable packet processing solutions...
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India , Bengaluru
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Not provided
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Palo Alto Networks
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Principal Software Engineer
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Lead security innovation for Microsoft Edge as a Principal Software Engineer in Redmond. Develop durable, self-healing architectures to protect users from novel threats, including agentic browsing. Utilize your expertise in C++, Rust, or Python to drive permanent solutions without compromising pe...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Sr Principal Engineer, Software
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Lead the architecture of Baxter's innovative cloud-based medical IoT platform in Bengaluru. You'll design scalable software for connected devices and data analytics, ensuring compliance with IEC 62304. This senior role requires expertise in .NET Core, Agile, and full lifecycle development. We off...
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India , Bengaluru
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Not provided
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Baxter
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Principal Software Engineer
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Join Microsoft's Azure Data team in Bangalore as a Principal Software Engineer. Design and develop cutting-edge database systems, leveraging deep expertise in C/C++/Rust and distributed cloud architectures. Lead innovation in storage, query optimization, and hybrid execution for the AI-era data p...
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India , Bangalore
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Not provided
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Microsoft Corporation
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Principal Software Engineer
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Lead the future of enterprise AI as a Principal Software Engineer on Microsoft's Turing Team. Design and build the core infrastructure powering the Microsoft 365 Copilot, impacting millions globally. This role requires 6+ years of experience in C++, C#, Python, or similar, with a focus on scalabl...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer (Frontend/Full Stack)
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Lead the technical vision for AI-powered shopping experiences in Microsoft Copilot. As a Principal Engineer, you will architect full-stack solutions, drive end-to-end execution, and set high standards for frontend quality and reliability. This senior leadership role is based in Vancouver, Canada,...
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Canada , Vancouver
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142400.00 - 257500.00 CAD / Year
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Microsoft Corporation
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Principal Software Engineer - Power BI
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Lead the technical strategy for AI-first services within Microsoft's Power BI platform. This Principal Software Engineer role in Redmond requires 6+ years of experience in languages like C# or Python. You will architect complex systems, write secure code, and drive engineering excellence for the ...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer
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Lead the fight against advanced email threats as a Principal Software Engineer in Hyderabad. Architect and build post-breach security systems and Agentic AI platforms for Microsoft Defender for Office. Leverage your 8+ years of experience in distributed systems and cloud services to innovate and ...
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India , Hyderabad
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Not provided
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Microsoft Corporation
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Principal Software Engineer, Full Stack
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Lead full-stack development for Microsoft Security in Redmond, shaping a safer digital world. This principal role requires 6+ years' expertise in C#, Java, Python, or similar, building scalable, secure cloud solutions. You will architect critical systems, mentor engineers, and define best practic...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer, Experimentation Platform - CoreAI
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Lead the architecture of Microsoft's high-scale Experimentation Platform (ExP) in CoreAI, enabling trustworthy A/B testing for AI-driven applications. This senior role in Redmond requires 6+ years of coding experience (C++, Python, etc.) and expertise in building scalable, resilient systems. You ...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer - Red Team
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Lead the development of AI-driven offensive security services at Microsoft. As a Principal Software Engineer, you'll build generative AI and agentic systems to automate red team engagements. Leverage your expertise in software engineering and attacker TTPs to create cutting-edge tools. This role ...
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United States , Multiple Locations
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Engineer Software (Full-Stack)
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Join our Santa Clara team as a Principal Full-Stack Engineer. Develop our industry-leading Cloud Data Loss Prevention (DLP) product using Java, microservices, and GCP/AWS. We seek an expert with 8+ years' backend experience to build scalable, secure systems in an Agile environment. Collaborate on...
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United States , Santa Clara
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147000.00 - 237500.00 USD / Year
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Palo Alto Networks
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Principal Engineer Software (Full Stack)
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Lead the development of next-gen security solutions as a Principal Full Stack Engineer in Pune. Design and build scalable microservices and advanced UIs using ReactJS, TypeScript, and Go/Python/Java. Leverage cloud-native tech (AWS, K8s) to handle massive datasets and protect our digital way of l...
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India , Pune
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Palo Alto Networks
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Principal Software Engineer
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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...
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India , Hyderabad
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Microsoft Corporation
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Principal Software Engineer - Backend
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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...
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United States , Redmond
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer, CoreAI
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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...
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United States , Multiple Locations
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139900.00 - 274800.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer
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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...
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Ireland , Galway
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90000.00 EUR / Year
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Nicoll Curtin
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Senior Principal Software Engineer
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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...
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United States
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138568.00 - 221709.00 USD / Year
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One Call
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Software Engineer, Principal
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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...
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United States , Bedford
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120506.00 - 145000.00 USD / Year
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DCS Corporation
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About the Principal Software Engineer role

Explore the pinnacle of a technical career with Principal Software Engineer jobs. This senior-level role represents the apex of individual contributor tracks, where technical mastery converges with strategic leadership. A Principal Software Engineer is not just a senior coder; they are the visionary architects and technical pillars of an organization, responsible for setting long-term technological direction and solving the most complex, large-scale challenges. Their work ensures that engineering efforts align with overarching business goals, creating robust, scalable, and future-proof systems.

Professionals in these roles typically shoulder a broad and impactful set of responsibilities. Central to their function is leading the architectural vision for major systems or entire platforms. They define the technical standards, select core technologies, and make critical decisions on system design with a focus on scalability, reliability, security, and performance. A significant part of their day involves deep collaboration, not only mentoring senior and junior engineers but also partnering with product managers, senior management, and other stakeholders to shape the technology roadmap. They are often the go-to experts for de-risking projects, conducting proof-of-concepts for new technologies, and providing technical guidance across multiple teams. Furthermore, they champion engineering excellence by driving initiatives around agile methodologies, CI/CD pipelines, DevOps practices, and robust quality assurance.

The typical skill set for a Principal Software Engineer is extensive and deep. A common requirement is 10+ years of progressive experience in software development, demonstrating a proven track record of designing, delivering, and maintaining complex, consumer-facing or enterprise-level systems. Expertise in modern technology stacks is essential, often including proficiency in languages like Java, Kotlin, C#, Python, or Go, and familiarity with front-end frameworks like React or Angular. A deep, practical understanding of distributed systems, cloud-native architectures (on platforms like AWS, Azure, or GCP), and containerization technologies like Docker and Kubernetes is standard. They are expected to be experts in API design, data modeling, and often, event-driven architectures using tools like Kafka. Beyond pure technical acumen, exceptional soft skills are non-negotiable. This includes superior communication abilities to articulate complex technical concepts to diverse audiences, strong leadership and mentorship capabilities, and outstanding analytical and problem-solving skills. While a Bachelor's degree in Computer Science is common, equivalent industry experience is often highly valued.

Ultimately, Principal Software Engineer jobs are for those who want to leave a lasting imprint on a company's technology. They are the strategic thinkers and technical pioneers who build the foundations upon which products and services thrive, making them one of the most critical and respected roles in the technology industry. If you are ready to guide technical strategy and mentor the next generation of engineers, exploring Principal Software Engineer jobs is your next career step.