Top Principal Engineer Jobs in Seattle, WA

Lead PSC (Power/Space/Cooling) capacity planning across a nationwide portfolio while designing AI/automation and data solutions. Perform facility power/DC analysis, produce space-planning deliverables, build LLM-driven bots, ETL pipelines, dashboards, forecasting models, and present executive-level readouts. Mentor teams and drive cross-functional engineering and operational improvements.

Lead design and implementation of end-to-end telemetry and observability platforms for VPC/cloud environments. Develop production-quality Python services, telemetry pipelines (metrics, logs, traces), CI/CD automation, monitoring, alerting, and SLO/SLI practices. Advise teams on instrumentation, standards, platform integrations, and operational readiness while creating reusable SDKs and reference architectures.

Senior individual contributor owning technical direction across Perception, Prediction, or Planning for on-vehicle autonomy. Design autonomy architecture, drive robustness, oversee model lifecycle and integration, and convert high-level decisions into production code running at scale on vehicles.

Lead technical strategy and architecture for Developer Experience: build scalable build/test/delivery systems, improve CI/CD throughput, design internal platforms/APIs/SDKs/CLIs, integrate LLM/agentic tooling safely, mentor senior engineers, and drive cross-team initiatives to increase engineering velocity, reliability, and maintainability at organizational scale.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering 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, design, and delivery of PET product features; write production full‑stack code; champion testing, observability, CI/CD and operational readiness; mentor engineers and collaborate with product to shape technical roadmap.

The Principal Engineer will lead the technical ecosystem, ensuring hands-on execution in a high-growth environment, focusing on AI integration and full-stack development.

Lead architecture and technical roadmap for Twilio's Compliance Experiences platform. Modernize legacy systems into cloud-native microservices, drive AI-augmented development (LLMs/agents), ensure reliability/security at scale, mentor senior engineers, translate regulatory requirements into developer-friendly APIs, and steer cross-team technical strategy and incident remediation.

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.

Lead architecture, development, and validation of end-to-end aircraft fuel systems. Drive cross-functional integration, system-level modeling (CFD), verification, supplier qualification, ground and flight test support, anomaly root-cause analysis, and mentor engineering teams while contributing to long-term fuel-system technology roadmaps.

Lead architecture and implementation of a high-performance OLAP query engine and semantic layer: design a JSON-based DSL and compiler, generate optimized SQL for columnar databases, build distributed caching, tune JVM and low-level performance, and provide technical leadership and documentation.

Build, operate, and secure cloud-native and edge infrastructure including Kubernetes, artifact pipelines, application streaming, and air-gapped appliances. Partner with product, GRC, and mission owners to design, deploy, and harden systems, remediate vulnerabilities, support audits (IL5/IL6/JWICS), and ensure trusted artifact delivery across environments.

Senior, client-facing principal to grow New Jersey land remediation practice. Responsibilities include business development, leading complex site investigation/remediation projects, technical oversight and review, NJDEP regulatory coordination with LSRP, project financial and staff management, mentoring staff, and promoting practice growth and technical excellence.

The Principal Engineer will lead AI-driven productivity initiatives, develop a strategy for integrating AI in engineering workflows, and improve collaboration across teams. Responsibilities include executing projects, ensuring code quality, and setting success metrics.

Lead the design of Xsolla's identity platform, develop Golang microservices for user management, and implement security protocols for compliance.

Lead architecture and implement large cross-cutting initiatives on a SaaS grantmaking platform. Produce high-quality full‑stack code (Rails/React/Node), mentor engineers, drive SDLC best practices, and champion AI-assisted development while collaborating with product, infra, and QA teams.

Lead Nordstrom's platform security vision, establishing security principles and architectures, mentoring staff, and quantifying security investments against business risks.

The Principal Consulting Engineer will design, deploy, and optimize VMware Cloud Foundation automation solutions, ensuring they meet customer requirements while leading engagements and providing technical expertise.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Lead multi-year technical vision and architecture for Payments, Scheduling, Forms, RCM and mobile platforms. Drive cross-team solutions, evaluate build-vs-buy, mentor senior engineers, set company-wide engineering standards, and ensure scalability, reliability, and observability for high-throughput distributed systems.

Technical authority responsible for shaping system architecture, architecting and scaling distributed cloud-native platforms, leading technical decisions and reviews, mentoring engineers, and applying AI/GenAI to business problems.

Provide hands-on technical leadership and architecture across the insurance platform. Design and implement scalable, reusable systems; influence senior leaders; mentor engineers; drive standards, DevOps/CI-CD improvements, vendor evaluations, and cross-team alignment to deliver enterprise-scale outcomes.

The Senior Process Engineer designs and implements controls for BTM generation systems, ensuring operational reliability and alignment with cybersecurity standards, while coordinating with vendors and supporting testing processes.

The Engineering Director will lead and manage the cloud infrastructure and developer enablement, focusing on AI-native systems, team development, and security operations.