Top Principal Engineer Jobs in Seattle, WA

The Principal Rust Developer will design and implement distributed systems using Rust for high-performance data processing, collaborate across teams, and mentor junior engineers.

Lead the technical and strategic evolution of the financial services platform, driving alignment across technology and business teams while mentoring engineers and improving engineering processes.

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.

Lead operational readiness reviews for large-scale data center projects, identify design/construction/commissioning gaps, drive corrective actions, validate turnover readiness, coordinate across design, construction, commissioning, and operations to ensure mission-critical infrastructure meets standards and is handed off reliably.

As a Principal Sales Engineer, lead technical sales engagements in healthcare, driving complex projects with executive stakeholders while mentoring teams and shaping product direction.

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

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.

The Principal Software Engineer will lead technical and strategic initiatives for the lending platform, improve engineering productivity, mentor teams, and collaborate across various departments to enhance services for members.

The Principal Electrical Engineer will lead system-level architecture for electrical designs, mentor engineers, drive engineering best practices, and ensure high-quality product delivery from concept to production.

As a Principal Software Engineer for the AAP team at Toast, you will design scalable systems, develop technical strategies, mentor engineers, and enhance data-driven initiatives.

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 the design and execution of radar sensing platforms and wireless communication sub-systems, overseeing development, optimizing designs, and ensuring quality and compliance. Collaborate across teams and mentor members while troubleshooting complex issues in RF/mmWave design.

The role involves building and optimizing a machine learning and simulation platform, supporting MLOps, model deployment, and infrastructure modernization, while mentoring engineers.

The Principal Developer Productivity Engineer will enhance GM's developer tools, mentor engineers, and drive system performance through observability and software engineering best practices.

Provide technical leadership for internal platforms and security automation supporting Upstart Bank. Lead architecture, design, and implementation of platform services, APIs, relational schemas, authentication and RBAC systems. Partner with risk, compliance, and operations stakeholders, mentor engineers, mitigate technical risks, and drive long-term platform strategy and engineering standards.

The Principal Engineer designs and implements game features, collaborates with teams, drives innovation, and provides technical leadership in game development.

The Principal Software Engineer will define technical roadmaps, guide system architecture, mentor leaders, and drive product direction in Capital Supply operations.

Lead the vision and strategy for Authentication at Databricks, focusing on security and user experience. Recruit and mentor engineering talent, communicate security innovations internally and externally.

Lead EWIS design, integration, testing, and certification across aerospace programs. Act as technical authority for wiring installations, create/maintain wiring diagrams and harness models, coordinate with systems, manufacturing, supply chain, customers, and certification authorities to ensure airworthiness and compliance.

As a Principal Security Engineer in Data Security, you will spearhead Upstart's data security program, architect software solutions, partner cross-functionally, and mentor teams while ensuring effective protection of sensitive data.

As a Principal Data Engineer, you will design and implement LLM, AI-powered security data platforms, mentor engineers, and drive the adoption of data solutions across teams.

Build and maintain ZODL's core Rust-based wallet and infrastructure (Zallet and core libraries). Implement protocol features from specifications, improve performance and reliability, support mobile teams, participate in reviews, testing, releases, and respond urgently to bugs and security issues.

Lead and build an R&D function to identify and validate new product opportunities across wallets and infrastructure. Independently prototype feasibility using code (Rust, TypeScript, Swift, Kotlin, Python), assess protocol and partner technology fit, produce handoff artifacts, and present recommendations to the CEO and leadership for further development.

The Principal Engineer will lead technical standards and practices, oversee high-priority projects, and mentor teams in programming and AI systems.