Top Principal Engineer Jobs in Seattle, WA

The Principal Engineer on the PaaS team will architect large-scale systems, mentor engineers, and drive technical direction for cloud services.

Lead design and future architecture of DigitalOcean data centers, owning MEP, cooling and power topologies (air to 800VDC liquid rack-scale), run PoCs, support site selection, mentor engineers, and translate AI/ML hardware roadmaps into scalable, deployable global standards.

The Staff Engineer will lead the Benchmarking & Performance team, managing performance data across CoreWeave's global infrastructure, developing benchmarking strategies, optimizing MLPerf submissions, and collaborating with NVIDIA and the open-source community.

Drive the design and operation of the Gradient AI platform, focusing on architecture, technical excellence, and innovation. Collaborate across teams, mentor engineers, and lead initiatives for scalability, performance, and reliability in AI/ML development.

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.

Lead end-to-end delivery of a product capability: design architecture, build full-stack cloud-native applications, integrate AI/ML/LLM features, implement CI/CD and MLOps, mentor a small developer team, manage technical risk, and ensure production reliability and observability.

The Principal Engineer will lead technical direction and execution for identity and engagement platforms, modernize systems, and mentor engineers, driving high-quality delivery and collaboration across teams.

The Principal Engineer will lead the Digital Identity group, architect solutions for complex problems, and ensure operational excellence by establishing processes and mentorship for the team.

Lead architecture and delivery of DigitalOcean's audit logging, SIEM integrations, and unified security visibility platform. Define multi-year roadmap, design high-throughput Go-based telemetry pipelines, ensure compliance-grade immutable audit records, build customer-facing visibility/control planes, and drive org-wide logging standards while mentoring engineers and coordinating cross-team integrations for consistent, high-fidelity security telemetry.

Technical leader responsible for architecting and building high-performance POS payment integrations. Drive platform-level technical strategy, develop Kotlin/JVM services, integrate hardware SDKs and EMV card payments, ensure security/key management, observability, and API design, mentor engineers, and collaborate across teams to deliver scalable, mission-critical payment solutions.

Lead the architecture and operation of Managed databases for AI workloads, ensuring high-scale, low-latency solutions while mentoring teams on best practices.

The Principal Engineer will design, build, and optimize a high-performance AI storage platform, focusing on scalability, performance, and collaboration across teams.

The Principal Software Engineer will design and implement systems for the advertiser experiences at Snap, lead technical vision, mentor engineers, and innovate on creator marketplace products.

The Principal Software Engineer will design and scale engineering components, lead projects, advocate best practices, and influence technical direction across teams.

The Principal Engineer will lead the engineering team in building systems across full stack, improving development efficiency, and expanding products in new markets.

The Principal Modem Engineer will architect, develop, and optimize modem connectivity solutions, oversee engineering teams, and manage the full modem stack on OpenWrt platforms.

Lead the development and implementation of AI agents for financial guidance. Define technical strategies, mentor engineers, and ensure compliance with industry standards.

The Principal Software Engineer will design automated ad serving systems, lead technical direction, collaborate with teams, and mentor engineers.

Lead the technical and strategic evolution of the financial services platform, driving engineering excellence and collaborating across teams to achieve business goals.

Lead the engineering architecture for an AI-driven product, focusing on system design, collaborating with AI agents, and ensuring quality and scalability in large-scale SaaS environments.

Lead the development of large-scale recommendation systems at Snap, overseeing technical leadership, collaboration across teams, and implementation of machine learning strategies to enhance content discovery and personalization.

As a Principal Engineer, you'll architect backend services for financial products, integrate with platforms, champion security, scale systems, and elevate engineering practices while mentoring others.

The Principal Software Engineer will develop ads infrastructure, lead technical direction for the Ads Platform, and ensure high availability and performance of systems. Responsibilities include collaborating across teams and advocating for best practices.

Lead design and development of AI Agentic Platform. Collaborate with teams to enhance AI-driven retail experiences and streamline operations. Mentor engineers, architect scalable systems, and influence technical strategy.

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.