Principal Systems Engineer Jobs

Antithesis is hiring ambitious Senior-to-Principal generalist engineers in Vienna to build high-performance systems, reactive notebooks, analytic databases, and formalized infrastructure.

Experienced systems engineer needed to lead development, integration, and sustainment of medium-caliber gun systems at Northrop Grumman Armament Systems in Mesa, AZ.

Lead the design and delivery of crypto-core, PKI, key management, identity and agentic security services for ServiceNow's AI platform as a senior technical architect and hands-on engineer.

Lead design and implementation of cloud-native, high-performance backend services and AI model-serving infrastructure for Palo Alto Networks' ATP Cloud team.

Vision Insurance

Dental Insurance

Performance Bonus

Paid Holidays

Lead architecture and build high-scale APIs and platform services at Gopuff to power millions of customer experiences and partner integrations.

Senior SRE leader needed to shape reliability practices, mentor engineers, and deliver resilient, scalable cloud infrastructure for a high‑throughput fintech platform.

Mission Driven

Social Impact Driven

Passion for Exploration

Reward & Recognition

Lead end-to-end electrical design and integration for Starlink satellites at SpaceX, overseeing system architecture, PCB/board-level design, testing, and production to enable high-performance space hardware.

Lead the hardware architecture and development of high-performance electronic systems, driving digital/analog/power design and FPGA integration from concept to production.

Inclusive & Diverse

Customer-Centric

Mission Driven

Fast-Paced

Growth & Learning

Transparent & Candid

Diversity of Opinions

Work/Life Harmony

Medical Insurance

Dental Insurance

Vision Insurance

Mental Health Resources

Health Savings Account (HSA)

Flexible Spending Account (FSA)

Learning & Development

Fitness Stipend

401K Matching

Equity

Life insurance

Disability Insurance

WFH Reimbursements

Flex-Friendly

Paid Time-Off

Maternity Leave

Paternity Leave

Paid Holidays

Paid Volunteer Time

Sabbatical

Zillow Group is hiring a Principal Software Development Engineer to lead architecture and delivery of scalable backend services for its mortgage platform and mentor engineering teams.

Senior engineering role to lead the architecture and implementation of scalable full-text and vector-integrated search systems for large-scale AI applications.

Lead architecture and delivery of large-scale, AI-driven security systems as a Principal Software Engineer at a fast-paced, remote-first company.

Lead the architecture and implementation of Docker AI Cloud’s distributed, multi-cloud control and data plane services as a Principal Software Engineer.

DIRECTV is seeking a Principal Software Engineer (Level 2) to architect and lead delivery of high-performance, reusable front-end solutions across digital platforms.

Lead architecture and full-stack engineering at WISEcode as a Principal Engineer, shaping scalable systems, mentoring senior engineers, and integrating AI into product workflows.

Palo Alto Networks is hiring a Principal Backend Engineer to own architecture and delivery of the Cortex Cloud backend platform protecting enterprise customers across major public clouds.

Lead the design and delivery of cloud-native NextGen Firewall services at a market-leading cybersecurity company in Santa Clara.

Lead the architecture and delivery of large-scale, regulated AI systems—driving multi-agent, multi-modal solutions and engineering standards across cross-functional teams.

Lead the development of scalable computer vision and recommendation systems to power hyper-personalized visual experiences as a Principal AI Engineer at a fast-moving, user-focused company.

Support mechanical integration of C2 systems for defense customers by performing 3D modeling, drafting, analysis, prototyping, and cross-functional engineering in the Huntsville hardware engineering team.

Lead the design and implementation of next-generation full-text search and indexing capabilities at Pinecone, integrating them tightly with vector search for production-scale AI applications.

Lead architecture and hands-on development of scalable user-facing systems while mentoring engineering teams at a fast-moving, remote-friendly U.S. company.

Lead high-profile power generation, plant facilities, and microgrid electrical design projects as a Principal Electrical Engineer at Stanley Consultants, an employee-owned engineering firm.

Senior technical leader needed to design scalable mobile and backend systems, mentor engineers, and help RapidAI deliver mission-critical clinical imaging software.

Lead the design and delivery of AI-enabled platform systems and internal automations at a remote-first proptech company, driving measurable operational impact across the business.

Lead the architecture and delivery of core cloud-native backend systems for Cortex Cloud, shaping the platform that protects large enterprises across public clouds.

Lead architecture and development of large-scale, AI-driven payment integrity systems at Machinify as a Senior Staff/Principal Software Engineer working remotely across the US.

Palo Alto Networks is hiring a Principal Engineer to architect and build AI security cloud services that secure LLM runtime environments using Go/Python, Envoy/WebAssembly, and large-scale distributed cloud architectures.

Lead the frontend architecture and engineering for a remote US product team building high-performance, media-rich web and mobile UIs using React, TypeScript, and real-time media APIs.

Skyward seeks a driven Principal Engineer to lead architecture, ship production AI-first features, and own AWS infrastructure while translating complex domain needs into elegant, customer-ready software.

Architect and lead the backend infrastructure for Palo Alto Networks' Cortex Cloud to deliver scalable, resilient cloud security services for enterprise customers.

Senior technical leader responsible for defining AI/ML vision, architecting enterprise ML systems, and leading cross-functional initiatives to drive innovation at Analog Devices.

Lead the design and ownership of company-wide build, test, CI/CD, and AI-assisted developer tooling to dramatically improve engineering velocity and reliability at Palo Alto Networks.

Palo Alto Networks is hiring a Principal Engineer to build and operate scalable backend services powering Prisma AIRS, the company’s AI security platform.

Lead development of scalable, secure robotic fleet management software as a Principal Enterprise Software Engineer working remotely across the US.

Lead engineering efforts to design and scale ProRata Attribution systems—covering content understanding, distributed serving, knowledge systems, and agentic backend workflows—at ProRataAI's Bellevue office.

Lead design and delivery of scalable, production-grade billing and metering systems at Cloudflare, working across teams to build highly reliable transactional microservices.

Senior technical leader needed to own architecture, lead delivery, and mentor engineering teams as we modernize and scale our ecommerce platform.

Lead PlatformOS as a Principal Engineer to architect scalable platform services, build an agent/LLM developer platform, and empower product teams across Anduril.

Lead Quizlet’s database architecture and operational strategy to scale and optimize Cloud Spanner, PlanetScale MySQL, and BigQuery for high availability and cost-effective performance.

Palo Alto Networks is hiring a Principal Backend Engineer to lead backend Java development for their cloud DLP product, focusing on high-performance microservices, distributed processing and scalability.

Lead design and implementation of highly available, scalable backend systems at LogRocket, building search, ML, and automation solutions to improve developers’ understanding of user behavior.

Lead the design and delivery of scalable, resilient central cloud platform services that accelerate product teams across Palo Alto Networks while mentoring engineers and shaping platform strategy.