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Principal Software Engineer Jobs

721 Job Offers

Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer — Layer 7 Security role in Santa Clara, CA. Lead architecture and development of next-gen, high-performance distributed security systems. Requires 12+ years of experience, expert-level C and Go, deep networking and TCP/IP expertise. Drive innovation in mission-c...
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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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Sr Principal Software Engineer (Quantum Security)
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Sr Principal Software Engineer (Quantum Security) role in Santa Clara, CA. You will lead the development of next-gen security solutions, focusing on Post-Quantum Cryptography (PQC) and SSL protocols for Palo Alto Networks' Strata Cloud Manager. Requires 10+ years in enterprise apps, cloud-native ...
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United States , Santa Clara
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170000.00 - 277000.00 USD / Year
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Palo Alto Networks Italia
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Principal Ai Software Engineer
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Principal AI Software Engineer at AMD in San Jose, US. Drive hardware-software co-design for next-gen GPU architectures and AI/ML software stacks. Lead performance engineering for large-scale models (LLMs, Diffusion) and collaborate with top hyperscalers. Join a culture of innovation to shape the...
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United States , San Jose
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240000.00 - 360000.00 USD / Year
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AMD
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Sr Principal Software Engineer (Quantum Security)
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Seeking a Sr Principal Software Engineer (Quantum Security) in Santa Clara, CA. You will lead the development of next-gen security solutions, focusing on Post-Quantum Cryptography (PQC) and SSL protocols. Requires 10+ years building large enterprise apps, deep cryptographic knowledge, and cloud-n...
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United States , Santa Clara
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170000.00 - 277000.00 USD / Year
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Palo Alto Networks
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Principal Technical Safety Engineer – Software Development
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Principal Technical Safety Engineer role in Warrington, UK, blending software development with risk management. You'll lead QRA, CFD, and RAM studies while maintaining and developing internal software using Python, C#, and .NET. Requires 8+ years in technical safety and full-stack skills. Benefit...
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United Kingdom , Warrington
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Not provided
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Risktec Solutions
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Principal Python Software Engineer
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Principal Python Software Engineer sought by a growing Financial Services client in Boston (hybrid). Leverage 8+ years of Python/Django/Flask experience to lead design of large-scale, high-performance distributed systems on AWS. Drive cloud-native solutions, Infrastructure-as-Code (Terraform), an...
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United States , Boston
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220000.00 - 250000.00 USD / Year
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Apollo Solutions
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Principal Software Engineer- Mobile
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Principal Software Engineer (Mobile) sought for Microsoft’s Office Android Shared Team in Hyderabad. You will architect core components using Java, Kotlin, and C++, driving AI-enabled UX innovation for Word, Excel, and PowerPoint. Requires 9+ years of experience, deep Android architecture knowled...
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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
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Principal Software Engineer role at Microsoft in Redmond, WA, driving innovation in AI agents within Copilot Studio. Lead design of scalable, secure platform capabilities for Digital Workers, leveraging Azure, M365, and Power Platform. Requires 6+ years engineering experience with C, C++, C#, Jav...
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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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Principal Software Engineer at Microsoft Security in Redmond, WA. Architect the next-generation Conditional Access engine processing millions of policy evaluations per second. Requires deep expertise in distributed systems, C#/.NET, identity protocols (OAuth2/OIDC), and Zero Trust principles. Dri...
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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 - Margin Technology
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Principal Software Engineer sought for Citi’s Margin Technology team in London. Design and build high-scale distributed systems using Java, Python, or React, with AWS, Kafka, and Kubernetes. Drive innovation in global finance, shaping automated platforms with a focus on clean code and TDD. Benefi...
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United Kingdom , London
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Not provided
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Citi
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Principal Software Engineer - Edge AI
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Principal Software Engineer – Edge AI role in Herzliya, Israel. Lead architecture and system design for AI on managed hardware, optimizing for connected/disconnected operations. Requires 10+ years of software engineering, K8S expertise, and deep AI stack knowledge. Drive high-impact technical out...
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Israel , Herzliya
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Not provided
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Microsoft Corporation
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Principal Software Engineer
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Principal Software Engineer role in Tokyo, Japan, leading architecture for Microsoft’s Mico AI experience. Drive full-stack development across iOS, Android, and web, owning 3D rendering, LLM orchestration, and adaptive personalization. Requires 8+ years in C++, C#, or Python, with AI expertise an...
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Japan , Tokyo
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Microsoft Corporation
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Principal Software Engineer - ISE
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Principal Software Engineer role in London with Microsoft’s ISE team. You’ll co-develop cloud-based AI solutions alongside enterprise customers, using C#, Python, or Java. Requires consultative experience, cross-functional collaboration, and up to 25% travel. Enjoy a competitive benefits package ...
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United Kingdom , London
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Microsoft Corporation
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Principal AI Software Engineer
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Principal AI Software Engineer sought by AMD to lead OneROCm software stack innovation across Instinct, Radeon, and Ryzen platforms. This hands-on role requires deep expertise in GPU architectures, AI/ML full-stack development, and hardware/software co-design. Drive next-gen products in San Jose,...
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United States , San Jose
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Not provided
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AMD
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Senior Principal Software Engineer — Layer 7 Security
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Senior Principal Software Engineer sought to lead Layer 7 security innovation in Santa Clara. This strategic role demands expert-level C/Go skills, deep Unix/Linux experience, and a proven track record designing large-scale distributed systems. You will define architecture for next-gen firewall p...
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United States , Santa Clara
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170000.00 - 277000.00 USD / Year
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Palo Alto Networks
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Principal Software Engineer
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Lead the development of critical monitoring and alerting for Microsoft 365 Resilience, including Copilot. As a Principal Software Engineer, you will architect robust reliability measures like Graceful Degradation across core platforms. Requires a BS in CS with 12+ years coding in C, C++, C#, or P...
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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 Applications Development Engineer
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Principal Software Applications Development Engineer sought in Bangkok, Thailand. This senior role demands Java, C++, Python, and agile expertise to design, optimize, and test complex applications. You will mentor junior developers and drive user-focused solutions. Join a dynamic team to lead cri...
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Thailand , Bangkok
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Not provided
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NTT DATA
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Principal Software Engineer
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Principal Software Engineer role in Redmond, WA, driving GPU inference optimization and LLM/SLM architecture for Microsoft’s AI monetization platform. You’ll accelerate deep learning inference across Copilot, Search, and Ads, bridging cutting-edge AI with business impact. Requires 8+ years in C++...
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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/ Senior Software Engineer - Identity Security
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Principal/Senior Software Engineer – Identity Security at Palo Alto Networks in Tel Aviv. Drive innovation securing identities across hybrid and SaaS landscapes using cloud-native tech (Kubernetes, Docker, AWS/GCP/Azure). Requires 5+ years backend experience, AI-assisted development skills, and a...
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Israel , Tel Aviv
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Not provided
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Palo Alto Networks Italia
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Principal / Senior Software Engineer - Identity Security
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Join Palo Alto Networks as a Principal/Senior Software Engineer in Tel Aviv, shaping the future of Identity Security. You'll architect scalable, cloud-native solutions using Kubernetes, Docker, and microservices to secure hybrid and SaaS landscapes. Leverage AI tools like Gemini and Claude to dri...
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Israel , Tel Aviv
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Palo Alto Networks
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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.