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Principal Software Engineer United States Jobs (On-site work)

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Principal Software Engineer - Copilot Security
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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 Engineering Manager, M365 Copilot
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Lead the critical middle-tier service powering Microsoft 365 Copilot across web, Windows, and Mac. This Redmond-based role requires a Principal Engineering Manager with 6+ years of experience and deep expertise in Azure web services. You will design APIs, infrastructure, and deployment pipelines ...
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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 - Security
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Lead AI security initiatives for Microsoft Edge in Redmond. This principal engineering role requires deep expertise in AI/LLM security, threat research, and practical mitigation coding. You'll provide technical leadership on complex safety scenarios and browser-integrated AI defenses. A collabora...
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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 - Copilot Identity
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Lead the identity strategy for Microsoft's consumer Copilot, ensuring secure and seamless authentication across all platforms. This principal engineering role requires deep expertise in identity systems and cross-platform delivery. Join a core team in Redmond to build the trusted foundation for p...
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United States , Redmond
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163000.00 - 296400.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer
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Lead the future of data platforms at Microsoft Azure in Redmond. As a Principal Software Engineer, you'll architect core database systems like Azure SQL DB and Cosmos DB, focusing on scalability and AI-driven innovation. Mentor a talented team while shaping the infrastructure powering a new class...
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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 - Copilot Security
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United States , Redmond, WA
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163000.00 - 296400.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer - Data, Personalization - Microsoft AI
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Lead the development of Microsoft AI's core personalization data infrastructure. As a Principal Software Engineer, you will architect scalable distributed systems and APIs that power adaptive, context-aware experiences for Copilot. This role in Redmond demands expertise in cloud services, OSS dat...
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United States , Redmond
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163000.00 - 296400.00 USD / Year
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Microsoft Corporation
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Principal Software Engineer - SASE
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Lead the development of next-generation SASE and SD-WAN security solutions. This principal role in San Jose (hybrid) requires deep expertise in C/C++, networking (IPSec/VPN), and data path development. Architect and optimize high-performance platforms for on-prem and cloud environments, leveragin...
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United States , San Jose
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133500.00 - 307000.00 USD / Year
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Hewlett Packard Enterprise
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Senior Principal Software Quality Engineer
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Join Baxter as a Senior Principal Software Quality Engineer in Raleigh. Ensure high-quality, safe software and medical device development within a regulated environment. Leverage 8+ years of experience in medical devices and knowledge of standards like IEC 62304. Enjoy comprehensive benefits, pro...
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United States , Raleigh
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120000.00 - 165000.00 USD / Year
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Baxter
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Principal Engineer, Software - Android
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Lead the next generation of the T-Mobile Android app as a Principal Engineer. Utilize your 7+ years of expertise in Kotlin, Jetpack Compose, and scalable architecture (VIPER/MVVM) to build for millions. Enjoy a top-tier Total Rewards package with stock grants and comprehensive benefits in key US ...
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United States , Bellevue; Denver; Overland Park; Frisco
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133500.00 - 240700.00 USD / Year
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T-Mobile
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Principal Software Engineer RR Level 3
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Seeking a Principal Software Engineer for an onsite role in Annapolis Junction. Prototype and develop novel solutions using TypeScript, React, Java, and Spring Boot in a dynamic, mission-driven environment. This role requires a polygraph and offers the freedom to choose the right tools for critic...
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United States , Annapolis Junction
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Not provided
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Anthem Engineering
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Principal Software Engineer
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Lead the design of our global logistics platform as a Principal Software Engineer in Hoboken, NJ. You will architect scalable microservices using Scala, Kubernetes, and AWS to handle millions of transactions. This role requires 7+ years of experience building large-scale distributed systems. Driv...
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United States , Hoboken, NJ
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Not provided
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Global-e
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Lead / Principal Software Engineer
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Lead the development of enterprise applications and cloud modernization at Amtrak. This principal role requires expertise in Java, Spring Boot, Angular, and AWS to architect scalable solutions. You will drive Agile/DevOps practices and mentor teams in a flexible hybrid model based in Washington, ...
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United States , Washington; Philadelphia; Wilmington
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103700.00 - 161352.00 USD / Year
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AMTRAK
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Principal Engineer Software Developer (Flow & Forwarding)
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Join our Next-gen Firewall dataplane team in Santa Clara as a Principal Engineer. You will design and develop critical L2-L4 networking components for cutting-edge firewalls using deep C programming and multi-threading expertise. This role offers ownership of large software modules, work on real ...
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United States , Santa Clara
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200000.00 - 225000.00 USD / Year
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Palo Alto Networks
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Software Engineer, Principal
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Seeking a Principal Software Engineer with an active Top Secret clearance to support critical Command, Control, and Battle Management (C3BM) programs in Bedford. This role requires 20+ years of DoD experience and expertise in the full software development lifecycle. We offer a comprehensive benef...
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United States , Bedford
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120506.00 - 150000.00 USD / Year
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DCS Corporation
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Principal Engineer Software - Dataplane
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Lead groundbreaking SASE data plane development as a Principal Engineer. Design and architect core networking systems using DPDK and Linux. Join a world-class team in Santa Clara to solve complex routing and security challenges. Enjoy stock units, bonuses, and comprehensive wellbeing programs.
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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 Software Systems Engineer
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Lead the development of groundbreaking healthcare solutions as a Principal Software Systems Engineer in Raleigh. You will drive new product development for Infusion Pump Platforms and Digital Apps using Agile and Systems Engineering. This role requires expertise in regulated medical devices, requ...
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United States , Raleigh
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Salary
112000.00 - 154000.00 USD / Year
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Baxter
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Senior Principal Software Systems Engineer
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Lead groundbreaking healthcare innovation as a Senior Principal Software Systems Engineer in Raleigh. Develop infusion pump platforms and digital apps using Agile methodologies in a regulated medical device environment. This role requires 10+ years of experience and offers a robust benefits packa...
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United States , Raleigh
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Salary
128000.00 - 176000.00 USD / Year
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Baxter
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Principal Software Systems Engineer
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Lead the development of groundbreaking healthcare solutions as a Principal Software Systems Engineer in Raleigh. You will drive new product development for Infusion Pump Platforms and Digital Apps using Agile and Systems Engineering. This role requires expertise in regulated medical devices, requ...
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United States , Raleigh
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Salary
112000.00 - 154000.00 USD / Year
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Baxter
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Senior Principal Software Systems Engineer
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Lead groundbreaking healthcare innovation as a Senior Principal Software Systems Engineer in Raleigh. You will drive new product development for Infusion Pump Platforms using Agile methodologies in a regulated medical device environment. This role requires 10+ years of experience and offers a com...
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United States , Raleigh
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Salary
128000.00 - 176000.00 USD / Year
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Baxter
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Until further notice
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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.

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