Top Principal Engineer Jobs in Seattle, WA

The Principal Software Engineer leads the design and implementation of innovative full stack software solutions while mentoring junior engineers and ensuring scalable architecture.

The Principal Software Engineer will architect and implement fraud detection and AML solutions, develop risk models, and optimize decision engines using advanced technologies and data analytics.

This role involves systems engineering for avionic systems, including system design, requirements analysis, testing, and customer communication. The engineer collaborates with Boeing and ensures compliance with regulatory standards.

Lead mobile software development as a Principal Mobile Software Engineer, driving technical strategy, building systems in React Native, and mentoring engineers to enhance user experience and scalability.

The Principal Field Security Engineer at GitLab tackles complex customer security issues, overseeing contract reviews, guiding internal teams, and providing expert security knowledge to ensure customer compliance and mitigate risks.

Lead the technical strategy for developer tools in a financial services company, focusing on AI-enabled development practices. Responsibilities include architectural design, mentorship, and driving innovation in software development.

Lead high-impact initiatives for a product platform, architecting security systems, mentoring engineers, and optimizing distributed infrastructures across teams.

The Principal Engineer in Billing Systems Design at T-Mobile leads the design and deployment of technical solutions, enhancing and evolving network systems while optimizing performance and cost efficiency. This role requires significant engineering expertise, innovation, and technical leadership to drive projects and mentor others.

The Principal Software Engineer leads software development projects, designs software systems, evaluates technology options, mentors engineers, and creates documentation for software solutions.

Lead design and implementation of enterprise-grade AI systems, architect AI infrastructure, and drive technical strategy for AI-powered products primarily for military applications.

As Principal Software Engineer at Gusto, you'll architect scalable payroll systems, lead cross-functional projects, mentor engineers, and drive product strategy.

Lead the development of an AI framework for endpoint security, collaborate with teams, optimize solutions, and ensure model efficiency across various platforms.

The role focuses on designing and optimizing backend systems for an AI security platform, leading architecture initiatives, and mentoring engineers.

Lead the design and development of secure, scalable software for F5's BIG-IP portfolio, mentoring engineers and driving technical architecture decisions.

The Principal Engineer will lead AI solutions design and development, mentor engineers, and ensure high-quality backend services and user experiences for AI applications.

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.

Looking for a Principal Software Engineer to lead AI-first products, evolve engineering practices, and mentor developers with a focus on Elixir and Python.

Lead the Application Security team in performing security assessments, mentoring, and advising clients on complex security issues while advancing AI in security workflows.

The Principal Software Engineer, Core Pricing will lead technical excellence, drive system design for loan pricing, and guide collaboration with ML scientists to optimize financial models.

Lead the design and implementation of simulation-based validation strategies for autonomous systems, mentoring engineers and ensuring performance metrics are met.

As Principal Product Manager, you'll drive the evolution of PagerDuty's developer platform, focusing on API integration and developer experience, while collaborating closely with engineering and AI teams.

The Principal AI/ML Engineer will develop machine learning models for campaign optimization in AdTech, collaborating across engineering and product teams to enhance advertising capabilities.

Lead and develop Agentic AI solutions, mentor team members, collaborate on AI applications, and tackle complex challenges in cybersecurity.

The Principal Software Engineer will lead the vision and execution for Developer Productivity, enhancing workflows and integrating AI tools to streamline software delivery across Dropbox's multi-product stack.

The Principal Software Engineer will lead technical initiatives, define architecture, prototype ideas, and foster an innovative engineering culture, working cross-functionally to turn visions into execution.