Top Principal Engineer Jobs in Seattle, WA

As a Senior+ Engineer, you will lead the design and architecture of impactful open-source projects while mentoring teams, coding, and engaging with the community.

Lead photolithography process engineering and team for wafer fabrication. Responsibilities include optimizing processes, troubleshooting, and collaborating on tech development.

The Principal Engineer for Customer Quality acts as the key customer contact for quality issues, addressing complaints, and driving continuous improvement. This role requires collaboration with multiple teams to establish quality standards and facilitate customer audits, while managing quality performance and supporting product lifecycle decisions.

The Client Engine Software Engineer will design and implement complex client-side engines using advanced algorithms, focusing on high-performance and fault-tolerance in a remote team environment.

The Principal Engineer leads the development of automated test processes for spacecraft, ensuring robust, repeatable tests by managing cross-functional teams and leveraging engineering expertise.

The Principal Engineer will lead the technical strategy for Stablecoin solutions, focusing on secure blockchain applications and architecture development, enhancing software efficiency and delivery quality.

Lead global MSAT technology transfer and process validation for late-stage and commercial biologics. Drive site-to-site transfers, develop global templates/protocols (PPQ, PQ, batch records), perform gap/risk analyses and mitigation, analyze process data and annual reviews, support regulatory CMC documentation and inspections, and mentor junior engineers.

Lead architecture and evolution of Kubernetes-based cloud and hybrid platforms. Design scalable, secure, multi-cluster platform capabilities, drive multi-year roadmaps, mentor senior engineers, lead incident response and platform transformations, and enable developer productivity across hundreds of teams.

Lead design, implementation, testing, and maintenance of mobile and web software. Build APIs and web applications, author documentation, create prototypes, perform code reviews, collaborate with designers and QA, support releases and post-release maintenance, mentor peers, and provide technical input for project estimates and sales.

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.

Lead and grow the Bothell Land Quality & Remediation practice as a principal-level environmental professional. Develop clients and proposals, provide technical oversight of site investigation and remediation (soil, groundwater, vapor, sediment), mentor a small team, manage budgets and schedules, and contribute to practice strategy and hiring.

The Principal Engineer will guide architectural strategy, solve complex technical challenges, mentor engineers, and ensure compliance with healthcare standards.

The Staff/Principal Engineer will lead AI-assisted engineering efforts, architect solutions using C#, React, and Python, and drive MLOps initiatives while mentoring senior engineers in a healthcare technology context.

Lead Salesforce architecture and technical delivery for enterprise projects, focusing on Marketing Cloud and Financial Cloud. Design integrations and SOA components, develop Apex/Visualforce/Lightning solutions, manage data model and APIs, and provide technical leadership to break solutions into executable work.

The role involves developing and verifying SoCs using ASIC and FPGA technologies, creating test plans, and debugging with team collaboration.

Lead architecture and technical strategy for Streamlit in Snowflake, evolving container and warehouse runtimes, embedding SDKs, and developer tooling. Drive cross-team programs, set standards for performance/reliability at scale, contribute code and design, mentor senior engineers, and partner with Product and Design to deliver a robust, enterprise-grade app platform.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

The Principal Software Development Engineer will lead the data engineering team, develop data systems, ensure quality controls, and mentor engineers. Responsibilities include managing data lifecycle, implementing frameworks, and collaborating with cross-functional teams.

Lead and manage Site Reliability Engineering operations, focusing on system reliability, developer productivity, and strategic leadership to enhance service stability and streamline software delivery processes.

Lead design and implementation of end-to-end debug and validation solutions for at-scale datacenter hardware. Drive cross-team root-cause analysis, defect reduction projects, test strategy, automation, and large-scale test deployment while communicating progress and technical recommendations to stakeholders.

Lead architecture and development of SoC validation firmware, debug infrastructure, and IP-level firmware libraries. Drive silicon bring-up, boot flow and memory training, root-cause complex HW/FW issues across RTL and firmware, and technically lead a small engineering team to deliver server-class SoC features into validation and manufacturing.

Design, implement, and maintain core debugger engines and kernel-mode transports (WinDbg/DbgEng, KDNET, TTD). Own components end-to-end, bring up debugging across x64/ARM64 and Windows/Linux, diagnose deep systems defects, improve reliability/performance/security, and advance AI-assisted debugging while mentoring engineers and collaborating with product, kernel, silicon, and OEM teams.

Lead technical strategy and architecture for Windows Widgets and MSN experiences. Drive design, development, and delivery of large-scale client and platform systems with focus on performance, reliability, experimentation, and cross-organizational collaboration.

Lead design and implementation of ESE storage enhancements for scalability, performance, reliability, and efficiency. Evaluate emerging storage hardware and open-source engine techniques, prototype and benchmark architectures, reduce write amplification, and influence cross-team platform strategy and execution.

Lead engineering teams in developing command and control software for mission systems. Manage technical execution, software architecture, and mentor engineers.