Principal Engineer, Plant Design Integration System OnePrincipal Engineer, Plant Design IntegrationBellevue, WARemote$69–$116 / hourThe ideal candidate will bring a broad nuclear engineering background, strong knowledge of NRC regulations, and the ability to lead cross-functional technical decisions affecting the overall plant design. Responsibilities: Support the development and maintenance of the Reactor Plant architecture and programs, ensuring integration of complex technical areas spanning design, analysis, licensing, and testing.
Principal Engineer, Seismic CSA Integration and Oversight System OnePrincipal Engineer, Seismic CSA Integration and OversightBellevue, WARemote$69–$115 / hourPerform technical reviews of work products, including seismic analysis, soil-structure interaction (SSI) analysis, and probabilistic assessments. Support the development of plant level requirements and strategies related to seismic design and licensing activities for advanced nuclear reactor projects.
Principal Applied Scientist, WW Fulfillment by Amazon - Global Supply Chain & Economics Science Amazon.com LLCPrincipal Applied Scientist, WW Fulfillment by Amazon - Global Supply Chain & Economics ScienceBellevue, WAThe FBA organization is looking for a Principal Applied Scientist with deep expertise in Operations Research, Reinforcement Learning, and strong modeling and analytical skills to join our cross-domain group of applied scientists, research scientists, economists, and data scientists building the intelligence layer for FBA's supply chain. Fulfillment by Amazon (FBA) is a service that enables sellers to outsource supply chain and fulfillment to Amazon and use Amazon's world-class science, technology, and logistics infrastructure to deliver billions of products from manufacturing hubs to customers worldwide with fast delivery promise.
Principal Product Manager - Tech, Social Advertising Amazon.com Services LLCPrincipal Product Manager - Tech, Social AdvertisingSeattle, WATo thrive in this role, you will need to demonstrate: - Bilateral Fluency: You understand both sides of the marketplace: how creators build audiences, create content, and monetize on social platforms (TikTok, Instagram, YouTube) AND how brands evaluate, buy, and measure media programmatically. You'll define how brands discover high-affinity creators, how campaigns get activated, how creators get compensated, and how the whole system integrates with Amazon's existing advertising products (DSP, Sponsored Products, Sponsored Brands, and Creator Ads).
SR. AI SECURITY ENGINEER Widenet ConsultingSR. AI SECURITY ENGINEERSeattle, WashingtonContractorDemonstrated understanding of LLM and agent attack surface: prompt injection, data leakage through model output, insecure tool use, supply chain risk in models and dependencies. – Assess and mitigate agentic risk classes including excessive agency, capability chaining, tool and memory poisoning, and unsafe autonomous action.
SR. CYBERSECURITY ENGINEER, CLOUD AND INCIDENT RESPONSE Widenet ConsultingSR. CYBERSECURITY ENGINEER, CLOUD AND INCIDENT RESPONSESeattle, WashingtonContractorLead and support investigations across cloud, identity, endpoint, email, and SaaS, including account compromise, data exfiltration, insider risk, and business email compromise. This position will help strengthen the cloud security posture, mature incident response capabilities, and advance data security and zero-trust initiatives.
NewPrinciple Engineer/Spacecraft Test Development Davron LLCPrinciple Engineer/Spacecraft Test DevelopmentTukwila, WAPRINCIPAL ENGINEER, SATELLITE TEST DEVELOPMENT | SPACECRAFT TEST DEVELOPMENT | TUKWILA, WA | PYTHON | DOORS | JAMA | GSE | SPACECRAFT INTEGRATION AND TEST | QUALIFICATION AND ACCEPTANCE TEST | TEST AUTOMATION | ITAR ELIGIBILITY | ONSITE . In this Principle Engineer/Spacecraft Test Development opportunity, you’ll lead the transition from engineering-driven test approaches to robust, automated qualification and acceptance campaigns that reduce variability and risk while increasing throughput.
Principal Recruiter, Principal Engineer Recruiting, PE Recruiting Amazon.com IncPrincipal Recruiter, Principal Engineer Recruiting, PE RecruitingSeattle, WAAs a client lead recruiter, you"ll have the unique opportunity to impact leadership teams across Amazon"s diverse technology landscape, building relationships with Directors and VPs while shaping the future of Amazon"s senior engineering community. Mid-day might involve leading a client update meeting where you present market analysis and candidate pipeline progress, followed by conducting in-depth technical assessments with potential candidates.
Principal Software Engineer / Principal AI Engineer - Commerce Platforms Microsoft CorpPrincipal Software Engineer / Principal AI Engineer - Commerce PlatformsRedmond, WA$142,800–$274,800 / yearExperience building or leading AI-powered solutions, production AI applications, LLM-enabled experiences, agentic workflows, intelligent automation, applied machine learning capabilities, or AI-assisted engineering practices. You will partner across engineering, product, research, data, security, compliance, and business teams to solve ambiguous technical challenges, deliver durable platform capabilities, and create business-critical impact at global scale.
Principal Electrical Engineer (2026-065) (WA, Kirkland) Astronics CorpPrincipal Electrical Engineer (2026-065) (WA, Kirkland)Kirkland, WA$152,072–$242,920 / yearAstronics Advanced Electronic Systems (AES) is seeking a Principal Electrical Engineer with a strong track record of implementing advanced power conversion technologies into aerospace-grade power supply and power conversion products. This role requires extensive knowledge of power conversion technologies-including resonant converter topologies and digitally controlled power supplies-along with strong leadership, mentoring, and presentation skills.
Principal Electrical Engineer (2026-065) AstronicsPrincipal Electrical Engineer (2026-065)Kirkland, WashingtonAstronics Advanced Electronic Systems (AES) is seeking a Principal Electrical Engineer with a strong track record of implementing advanced power conversion technologies into aerospace-grade power supply and power conversion products. This role requires extensive knowledge of power conversion technologies—including resonant converter topologies and digitally controlled power supplies—along with strong leadership, mentoring, and presentation skills.
Principal Electrical Engineer - RF Helion Energy IncPrincipal Electrical Engineer - RFEverett, WAYou will integrate plasma science with high-power electrical engineering to deliver reliable, scalable, and high-fidelity plasma and energy system measurements that directly inform performance optimization, generator commissioning, and future device development. Design, test, and troubleshoot high-voltage electrical systems including power delivery to pulsed magnets, energy recovery circuits, and internal power networks used during pulsed generator operation.
Principal Electrical Engineer Helion Energy IncPrincipal Electrical EngineerEverett, WAYour work will focus on high-power electrical systems including energy delivery to pulsed magnetics, energy recovery systems, internal redistribution networks, and grid-tie infrastructure. Since Helions founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward.
Principal Engineer - Plant Design Integration ProtingentPrincipal Engineer - Plant Design IntegrationBellevue, WARemote$69–$115 / hourResearch, develop, and implement design bases and design strategies in support of plant design and licensing activities from various sources that include risk-Informed, performance-based strategies and methodologies, safety analysis concepts, commercial and operational objectives, and stakeholder objectives. About Protingent: Protingent is an Award-Winning provider of top-tier Engineering and IT talent, trusted by companies at the forefront of innovation — from Software and Aerospace to AI, Clean Tech, Medical Devices, and Connected Technologies.
NewPrincipal Electrical Engineer Astronics CorporationPrincipal Electrical EngineerKirkland, WA$152,072–$242,920 / yearAstronics Advanced Electronic Systems (AES) is seeking a Principal Electrical Engineer with a strong track record of implementing advanced power conversion technologies into aerospace-grade power supply and power conversion products. This role requires extensive knowledge of power conversion technologies—including resonant converter topologies and digitally controlled power supplies—along with strong leadership, mentoring, and presentation skills.
Principal Engineer, Data Center Architect DigitalOceanPrincipal Engineer, Data Center ArchitectSeattle, WA$184,000–$231,000 / yearDefining and owning DigitalOcean's reference architectures for next-generation Data Center environments, navigating shifts in technology, networking topologies, and AI/ML hardware roadmaps to keep facility designs future-proofed. Architecting end-to-end power topologies with vendor teams to support diverse hardware across medium to ultra-high-density rack deployments, moving from 415VAC to 800VDC.
Principal Engineer, Data Center Deployment Ops DigitalOcean LLCPrincipal Engineer, Data Center Deployment OpsSeattle, WA$184,000–$231,000 / yearWhat You'll Be Doing: Defining and owning DigitalOcean''s reference architectures for next-generation Data Center environments, navigating shifts in technology, networking topologies, and AI/ML hardware roadmaps to keep facility designs future-proofed. Architecting end-to-end power topologies with vendor teams to support diverse hardware across medium to ultra-high-density rack deployments, moving from 415VAC to 800VDC.
Senior Principal Engineer, Central Ops & Systems Docker IncSenior Principal Engineer, Central Ops & SystemsSeattle, WARemote$219,000–$352,000 / yearAs Senior Principal Engineer, you will establish strategic technical plans that span the company systems/data architecture and the end-to-end employee experience, make critical architectural decisions that affect Dockers entire internal systems portfolio, and drive technical execution of cross-company initiatives that directly enable every Dockhand. Youll work at the technical intersection of AI, platform infrastructure, developer SDLC, corporate systems, and Docker products, ensuring all systems work together seamlessly to support Dockers most precious resources: our employees.
Principal Engineer - Product Integrity Blue Origin Enterprises LPPrincipal Engineer - Product IntegritySeattle, WA$157,059–$219,882.60 / yearand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing (CDL drivers only), vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. You will solve unprecedented challenges in ensuring hardware survives the rigors of launch, orbit, and long-duration deployment-pioneering physics-of-failure methodologies, predictive reliability frameworks, and AI-driven engineering approaches that redefine how high-stakes hardware is designed, qualified, and validated.
Principal Engineer - TeraWave RF and Optical Systems Blue Origin Enterprises LPPrincipal Engineer - TeraWave RF and Optical SystemsSeattle, WA$332,694–$465,771.60 / yearand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Direct the architecture of high-fidelity HITL frameworks that replicate orbital dynamics - delay/Doppler profiles, azimuth/elevation tracking, handovers, and real-time kinematics - using CATR/anechoic ranges, channel emulators, GNSS simulators, hexapods/positioners, and precision RF and optical reference instrumentation.