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Principal Engineer Jobs

1765 Job Offers

Principal Electrical Engineer, Power Systems
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Astro Mechanica seeks a Principal Electrical Engineer in San Francisco to lead medium-voltage power system design, from switchgear to grid interconnection. Requires 10+ years, ETAP/SKM proficiency, and NEC/IEEE expertise. Competitive benefits included.
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Astro Mechanica
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CS&A Principal Engineer
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Assystem seeks a CS&A Principal Engineer in Warrington to lead design and site engineering teams on the Box Encapsulation Plant at Sellafield. Requires chartered status (ICE or IStructE), nuclear sector experience, and strong structural design expertise.
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ASSYSTEM
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Principal Nuclear Security Engineer
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Assystem seeks a Principal Nuclear Security Engineer in Glasgow to provide engineering assurance for security-related nuclear assets. Requires high-hazard regulated experience, SyAPs knowledge, and security case expertise.
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ASSYSTEM
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Principal Software Engineer
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Join Partly as a Principal Software Engineer in Auckland, building mission-critical, scalable systems for our SaaS and API platform. Requires 5+ years of complex app experience, strong CS fundamentals, and distributed systems knowledge. Rust and automotive experience are a bonus.
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Partly
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Principal Product Engineer - Order to Cash
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Lead technical architecture for Billing and Order-to-Cash in India. Hands-on Principal role requiring deep ORMB expertise, Java, SQL and API skills to design enterprise billing solutions and guide engineering teams.
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Lseg
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Principal Systems Engineer, Signal-Path Performance & Modeling
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Lead signal-path architecture for silicon photonics at Neurophos in Austin. Requires MS/PhD, 7+ years in communication systems, link-budget modeling, and DSP expertise. Top benefits and equity.
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Neurophos
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Principal Software Engineer
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UiPath seeks a Principal Software Engineer in Bellevue to architect large-scale cloud services and AI-native systems. Requires 10+ years building commercial applications, distributed systems expertise, and a founder mindset.
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UiPath
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Principal Deployment Engineer
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Lead complex Celonis deployments in Tokyo as Principal Deployment Engineer. Requires 12+ years in consulting, PQL/SQL/Python skills, and AI fluency to drive enterprise process intelligence solutions.
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Celonis
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Principal, AI Security Engineer
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Lead AI security engineering at Micron in Boise, designing guardrails, detection, and automated response for agentic AI threats. Requires 8+ years in security engineering, Python expertise, and hands-on LLM/agent security experience.
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Micron
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Principal Thermal Engineer - Aircraft Avionics & Thermal Systems (R3930)
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Lead thermal architecture for UAV avionics at Shield AI in Seattle. Requires 12+ years in electronics thermal engineering, CFD expertise (FloEFD, Icepak), and strong heat transfer fundamentals. Shape next-gen AI aircraft systems.
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250000.00 - 350000.00 USD / Year
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Shield AI
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Principal / MTS Engineer, SSD Validation
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Lead SSD firmware validation for enterprise and data center products in Singapore. Requires 8+ years in SSD testing, NVMe/PCIe expertise, and strong automation skills. Drive test architecture and CI/CD innovation.
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Micron
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Principal Engineer, Space Special Projects
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Lead space special projects at Anduril as Principal Engineer in Chantilly. Requires active Top Secret/TS/SCI clearance, DoD/IC satellite systems expertise, and spacecraft architecture experience. Shape next-gen defense space capabilities.
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Anduril Industries
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Principal Power Controls Engineer
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Lead power electronics controls at Anduril in Costa Mesa. Design and validate closed-loop algorithms for multi-kW SiC/GaN converters using Simulink/PLECS. Requires 15+ years in digital control loops and U.S. Secret clearance eligibility.
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Anduril Industries
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Principal Embedded Engineer, EW
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Anduril seeks a Principal Embedded Engineer in Costa Mesa to develop high-performance EW software, including DSP and RFML models. Requires 15+ years in software engineering and U.S. Top Secret SCI eligibility.
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Anduril Industries
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Principal Mechanical Engineer / Systems Engineer
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Lead mechanical architecture for HaloBraid, a first-of-its-kind robotic braiding device in Cambridge, MA. Requires 10+ years in electromechanical product development, CAD review, DFM/DFA, and pilot-to-production delivery. Equity, full benefits, unlimited PTO.
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HaloBraid
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Principal ASIC Engineer (Mixed-Signal)
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Voyant Photonics seeks a Principal Mixed-Signal ASIC Engineer in NYC to lead its custom IC program. Requires 7+ years analog/mixed-signal design, TIA expertise, and multiple tapeouts. Ground-floor role delivering silicon in 9-12 months.
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Voyant Photonics
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Principal Game AI Engineer
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Ghost Story Games seeks a remote Principal Game AI Engineer for Judas, Ken Levine's new title. Requires deep UE4/UE5 AI expertise, strong C++, and a shipped AAA action/FPS title. Own AI systems from design to polish.
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United States, Massachusetts
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Take-Two Interactive Software, Inc.
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Staff / Principal Software Engineer – Cloud Platform & SaaS
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Lead cloud platform architecture for SingleStore Helios as Staff/Principal Engineer in San Francisco. Requires 8-12+ years distributed SaaS, deep Kubernetes and Go/Python expertise, multi-cloud networking skills.
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SingleStore
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Principal Test Framework Software Engineer
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Lead the architecture of scalable test automation frameworks for cutting-edge AI hardware at Graphcore in Austin. Requires strong Python, CI/CD, and Principal-level leadership. Competitive benefits included.
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Graphcore
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Principal Engineer, Civil
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Lead civil engineering projects across the western U.S. as a Principal Engineer in Boise. Requires PE registration, 10+ years of experience, and proven team leadership. Enjoy strong benefits and growth opportunities at a top AEC firm.
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Apex Companies
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About the Principal Engineer role

Explore the pinnacle of technical leadership with Principal Engineer jobs. A Principal Engineer is a master-level technical expert and strategic leader within an engineering organization. This is not merely a senior role; it represents the apex of an individual contributor technical track, where influence, architectural vision, and deep expertise converge to shape the technological future of a company. Professionals in these roles are the go-to authorities for the most complex, high-impact challenges, setting technical standards and driving innovation across multiple teams or the entire organization.

The common responsibilities of a Principal Engineer are vast and critical to long-term success. Typically, they involve defining and driving the long-term technical strategy and architectural vision for major platforms or product suites. They are responsible for researching, prototyping, and selecting technologies that will scale to meet future business needs. A core part of their duties includes leading the design and implementation of complex, cross-functional systems, ensuring they are resilient, secure, and efficient. They serve as the ultimate escalation point for critical production issues, conducting deep-dive analysis and root cause investigations to resolve systemic problems. Furthermore, Principal Engineers have a significant mentorship and governance function, actively coaching senior and staff engineers, establishing best practices, and conducting rigorous code and design reviews to maintain exceptional quality across all engineering outputs. They are also key collaborators, working closely with engineering managers, product leaders, and enterprise architects to align technical execution with business objectives.

The typical skills and requirements for these high-level positions are extensive. A bachelor's or master's degree in computer science, engineering, or a related field is common, though equivalent demonstrable experience is often acceptable. Most roles require a minimum of 10+ years of progressive, hands-on software development or infrastructure engineering experience, with a significant portion spent in lead or architecture-focused positions. Essential technical skills include mastery of relevant programming languages and frameworks, profound knowledge of system design patterns and distributed architectures, and expertise in cloud platforms like AWS, Azure, or GCP. They must possess exceptional analytical and problem-solving abilities to deconstruct ambiguous, complex problems. Beyond technical prowess, superior soft skills are non-negotiable; this includes outstanding communication to articulate technical vision to both technical and non-technical stakeholders, proven leadership and influence without formal authority, and strategic business acumen. For those seeking to define technological frontiers and mentor the next generation of experts, Principal Engineer jobs offer a challenging and highly rewarding career path at the forefront of innovation.