Top Principal Engineer Jobs in Seattle, WA

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

Leads the architecture and implementation of JPMC-VPC, a software-defined networking platform. Designs control, distribution, and data planes, gateways, load balancers, and IPAM systems; writes production code; develops reusable frameworks; drives modernization, scalability, resilience, and operational stability. Collaborates with vendors, open-source communities, and cross-functional stakeholders while providing strategic technical leadership across networking and distributed systems.

The Principal Engineer will lead the design and delivery of core platform capabilities, focusing on scalable systems, AI application, and mentoring engineers while driving architectural decisions and improving operational systems.

As an AI Native Software Engineer, you'll build products using AI coding agents, translating customer needs into solutions, and ensuring quality delivery and documentation.

Build end-to-end data-focused product features across backend and frontend systems. Develop REST APIs, React interfaces, and cloud-native applications using distributed databases, containers, and open-source data technologies. Own complex software design, architecture, implementation, releases, and project lifecycles. The role supports defense and government customers, requires U.S. citizenship, eligibility for Top Secret/SCI clearance, onsite work in Tampa or Tacoma, and up to 30% travel.

Lead design, development, and delivery of avionics software for airborne traffic, collision avoidance and surveillance systems. Mentor engineers, define requirements, conduct code reviews, manage risks, and ensure projects meet schedule, scope, and budget.

As a Principal Engineer at CoreWeave, you will design cluster orchestration systems, lead technical direction, ensure system reliability, and mentor engineers while focusing on large-scale GPU cluster performance for AI workloads.

Defines the multi-year technical vision and architecture for Docker’s Central Operations and Systems organization. Leads cross-company platform programs, SDLC golden-path development, infrastructure standardization, AI platform enablement, observability, reliability, cost optimization, and systems convergence. Influences executives and engineering teams, drives build-versus-buy decisions, mentors senior technical leaders, and may participate in on-call support.

Lead design and delivery of flight-critical power electronics for the X-BAT aircraft, including inverters, DC-DC converters, and battery management. Own full hardware development cycle, drive PCB layout, harden designs for harsh environments, mentor engineers, lead reviews, and manage program timelines through production.

Develop and implement real-time sensor processing and multi-sensor state estimation algorithms (IMU, radar, cameras, GPS). Design pipelines, run field tests, integrate with cross-functional teams, and optimize for production on compute-constrained systems.

Lead design and development of primary and secondary aircraft structures for next-gen UAVs. Own CAD/FEA-driven structural lifecycle, material selection (composites/metal), testing, integration, verification, and mentor junior engineers while ensuring manufacturability and compliance with aerospace standards.

Design and scale critical, highly-available services; set technical direction across teams; apply best practices for availability, scalability, cost, and operational excellence; leverage AI tools and high-velocity workflows; mentor engineers and solve ambiguous, company-wide technical problems.

Lead architecture and technical execution for Toast’s Payroll and Team Management products. Own authentication, authorization, and organizational hierarchy across a multi-tenant SaaS platform. Drive high-scale, full-stack initiatives, modern agentic development practices, integrations, technical strategy, quality standards, deployment practices, and cross-functional collaboration. Mentor engineers across teams and leverage AI tools and LLM integration to improve software development velocity and quality.

Lead technical direction and architecture for foundational Microsoft Edge and Chromium web platform capabilities. Design and deliver innovations across browser systems, APIs, performance, security, accessibility, and compatibility. Contribute directly to Chromium, web standards, and open-source initiatives while collaborating with browser vendors, standards bodies, and internal teams. Provide technical leadership, mentorship, and end-to-end ownership for complex, cross-organizational engineering efforts.

Design, build, test, deploy, and operate highly available distributed Azure Monitor services at hyperscale. Develop telemetry collection, routing, storage, APIs, automation, monitoring, diagnostics, and AI-assisted capabilities. Improve reliability, security, observability, and operational excellence while participating in incident response. Lead architecture and design reviews, collaborate across teams, communicate technical tradeoffs, and mentor engineers.

Lead end-to-end ASIC package architecture and execution for high-performance FC-BGA and MCM solutions. Define substrate stack-ups, ball maps, SI/PI strategies, thermal architecture, materials, and assembly processes. Partner with silicon, RF, and systems teams to optimize package interfaces, manage OSAT and substrate vendors, establish design standards, and drive qualification through production ramp for high-pin-count, power-dense ASICs.

Lead architecture, design, and delivery of hyperscale distributed storage and database platform capabilities. Drive technical strategy across storage, data protection, capacity planning, and AI-native system design. Partner cross-functionally, use telemetry and experimentation to optimize performance and reliability, lead live-site excellence and operational automation, establish technical standards, and mentor engineering leaders.

Lead the architecture, circuit design, integration, verification, tapeout, and silicon validation of high-speed ADCs, DACs, and analog front-ends for advanced mixed-signal SoCs. Drive architecture trade studies, calibration techniques, FinFET CMOS implementation, converter integration, simulation methodologies, and collaboration with RF, digital, systems, package, and verification teams. Provide technical leadership and mentorship to analog and mixed-signal engineers.

Architect and deliver cloud-scale data integration products for Microsoft Fabric, owning end-to-end design, runtime, monitoring, reliability, security, and deployment. Mentor engineers, drive engineering excellence, integrate AI tooling, lead incident response as a DRI, and collaborate across Fabric, Azure Data Factory, and Power Query teams to meet scalability and resiliency goals.

Design and implement scalable, highly available cloud platform features for Azure Virtual Desktop and Windows 365. Lead architecture, mentor engineers, drive cross-team delivery, improve reliability, observability, test coverage, and operational practices for large-scale microservices.

Lead end-to-end technical delivery of broadband device platforms (hardware, software, firmware, cloud, security, validation, manufacturing). Drive program plans, stage gates, vendor management, launch readiness, post-launch support, and mentor cross-functional teams while reporting to executives.

Lead architecture, design, development, and deployment of highly scalable, reliable Intune core infrastructure services. Provide technical leadership and mentorship, collaborate with cross‑org partners, investigate technical issues, and drive continuous improvement and technical strategy.

Perform system modeling of analog circuits and SerDes interface IP; coordinate post-silicon interfaces between ATE/validation and design teams; lead debug activities; contribute to analog circuit-level architecture and overall architectural direction; support post-silicon validation, waveform review, and calibration debugging.

Designs and delivers Power BI features within Microsoft Fabric, applying AI-native development practices across the SDLC. Provides technical leadership, mentors engineers, guides stakeholders, confirms customer requirements, and supports large-scale production services through on-call incident monitoring. Requires strong software architecture, distributed systems, cloud platform, reliability, performance, security, and AI expertise.

Leads forward-deployed engineering engagements for strategic enterprise customers, diagnosing and resolving complex Windows device-management challenges. Designs and implements solutions using Intune, Autopilot, provisioning, configuration, security, application, and update management technologies. Develops scripts, diagnostic tools, prototypes, and reusable guidance; analyzes telemetry and logs; collaborates with product engineering to drive fixes; and scales customer solutions into repeatable tools and playbooks.