Top Principal Engineer Jobs in Seattle, WA

Own the reference architecture and production operation of rack-scale GPU inference systems. Design NVLink domain allocation, RDMA fabrics, NCCL performance, Kubernetes topology-aware scheduling, multi-node serving, failure recovery, diagnostics, fleet lifecycle, and rack validation. Partner with data center teams, NVIDIA, and ODMs on hardware bringup, cooling, power, and deployment constraints. Set technical direction, mentor engineers, and represent the company in industry and customer engagements.

Own the technical vision and roadmap for DigitalOcean’s unified memory and storage layer supporting large-scale LLM inference. Design multi-tier systems across GPU memory, host memory, NVMe, and remote storage; integrate with vLLM, SGLang, and TensorRT-LLM; define KV-cache transfer, eviction, admission, and routing protocols; optimize performance and unit economics; and lead cross-functional architecture, mentorship, open-source contributions, and customer-facing technical initiatives.

Lead architecture and delivery of a secure, low-latency Kubernetes-based compute platform for AI agents and untrusted workloads. Own isolation, scheduling, lifecycle, networking, policy, observability, and control-plane capabilities across GCP and AWS. Drive cross-team outcomes from design to adoption, improve developer experience via APIs and automation, and champion reliability, security, performance, and cost efficiency while mentoring engineers and setting technical direction.

Provides organization-wide technical leadership for Atlassian’s Trusted Data Platform and Data Exchange Platform. Defines architecture and multi-year strategy for cloud-agnostic distributed data infrastructure, streaming, compute, platform intelligence, reliability, and disaster recovery. Leads cross-team initiatives, resolves architectural ambiguity, establishes engineering standards, drives reusable platform capabilities, manages incident response, and mentors senior and principal engineers across distributed global teams.

Lead the architecture, design, and delivery of complex, scalable software systems for Expedia Group’s flight search platform. Guide engineering teams, develop APIs and data models, integrate responsible AI/ML solutions, improve operational excellence, and collaborate across functions. The role requires expertise in distributed systems, secure software architecture, modernization, and technical leadership, with preferred experience in neural search, vector databases, deep learning, ranking, personalization, and real-time model serving.

Leads major cross-department software initiatives from scoping through delivery, establishes technical roadmaps, evaluates technologies through proofs of concept, and guides strategic decisions. Oversees quality assurance, compliance, documentation, standards, and secure software delivery. Mentors teams, manages stakeholders and vendors, supports process improvement, and drives measurable productivity gains. Requires strong software engineering expertise, Java/Spring or Python coding, AWS, Databricks or Snowflake, and experience applying AI in software design.

Leads technical strategy, architecture, and engineering execution across Atlassian’s Rovo Chat, Search, Growth, Apps, and Clients experiences. The role drives scalable AI foundations, Search and Chat convergence, personalization, experimentation, reliability, security, and operational excellence. It involves leading cross-organizational initiatives, partnering with product, design, data science, and machine learning teams, mentoring senior engineers, and shaping multi-year technical roadmaps for customer-facing applications.

Lead the technical strategy and architecture for Snap’s Ads Marketplace, including bidding, pacing, auctions, inventory optimization, traffic allocation, and ad reranking. Design scalable algorithms and distributed systems that improve advertiser performance, marketplace efficiency, revenue, and user experience. Lead cross-team engineering initiatives, experimentation, production delivery, reliability, and performance improvements while mentoring senior engineers and technical leaders.

Leads the design, modeling, simulation, testing, validation, and integration of fluid and thermal systems for autonomous aircraft and ground platforms. The role applies first-principles engineering, develops system and custom models, manages suppliers, supports component sourcing, and mentors engineers. It requires deep expertise in heat transfer, fluid dynamics, thermodynamics, thermal management, testing, CAD, and aerospace or defense system development.

Leads the technical vision and architecture for Remitly’s Core Transfer Experience organization. Responsibilities include modernizing legacy distributed systems, establishing scalable and reliable backend, mobile, and web architectures, driving incremental migrations, setting operational excellence standards, enabling AI-native experiences, and influencing strategy across multiple engineering teams. The role requires hands-on technical leadership, mentoring, cross-functional partnership, and ownership of high-traffic customer-facing systems.

Provides technical leadership for real-time RF sensor software development, integration, testing, and validation. Designs high-performance C/C++ systems, integrates signal-processing algorithms, debugs distributed and multithreaded applications, and transitions MATLAB/Python prototypes into production software. The role includes technical mentoring, customer and government stakeholder engagement, proposal development, documentation, system demonstrations, visualization tools, and approximately 10% travel for integration and field-testing activities.

Owns company-critical, long-term technical problems across multiple teams and organizations. Defines technical strategy, architectures, roadmaps, and engineering standards for large-scale customer-facing systems. Remains hands-on in software development while driving AI adoption in products and engineering workflows. Partners with senior product, engineering, and executive leaders to resolve complex problems, improve reliability and performance, and shape Dropbox’s technical direction.

Build and own Arcadia’s internal developer platform across a large-scale data lakehouse and Kubernetes applications. Develop self-service APIs, templates, golden paths, CI/CD capabilities, observability, security controls, and reliability practices. Lead platform migrations, improve developer experience, manage stakeholder needs and costs, set technical direction, and coach senior engineers. The role requires hands-on software development alongside expertise in cloud infrastructure, Kubernetes, networking, infrastructure as code, SLOs, incident response, and platform product management.

Leads the architecture and implementation of JPMC-VPC, a software-defined networking platform. Designs control, distribution, and data planes, gateways, load balancers, and IPAM systems; writes production code; develops reusable frameworks; drives modernization, scalability, resilience, and operational stability. Collaborates with vendors, open-source communities, and cross-functional stakeholders while providing strategic technical leadership across networking and distributed systems.

Designs scalable software frameworks and production systems for high-performance computing, optimizing AI/ML model training and inference across compute architectures. Leads technical design reviews, benchmarking, telemetry, secure coding, and operational improvements. Develops enterprise agentic AI engineering workflows with governance, validation, auditability, security, and resiliency guardrails. Mentors engineers and drives adoption of HPC, AI/ML, and automation practices across teams.

Lead the architecture and technical direction of Forward Financing’s core fintech platform. Design scalable distributed backend systems, guide cross-team initiatives, establish engineering best practices, resolve incidents, and mentor engineers. The role owns the technical roadmap and architectural vision while partnering across teams to improve reliability, observability, code quality, and delivery. Ruby on Rails expertise is required, along with strong communication, influence, agile development experience, and a broad backend or full-stack perspective.

Leads the technical vision and execution of Pinterest’s large-scale indexing and retrieval infrastructure across Core, Ads, and Shopping. Drives architecture modernization, real-time and incremental retrieval, shared platform capabilities, metrics, debugging workflows, and improvements in relevance, freshness, reliability, coverage, and cost. Partners across engineering, product, ML, and infrastructure organizations, mentors senior technical staff, and validates AI-assisted engineering work with strong attention to correctness, privacy, safety, and operational excellence.

Own customer-facing products end to end across the full stack, from React and TypeScript interfaces to backend services and APIs. Shape product and architecture decisions, use telemetry to measure outcomes, and build AI-enabled and agentic experiences with LLMs. Set technical direction, collaborate with product and design teams, mentor engineers, and drive ambiguous prototypes into reliable, scalable production systems.

Own customer-facing product features across the full stack, from ambiguous problems through measurable outcomes. Make architecture and product decisions, use telemetry to guide design, and build AI-enabled and agentic experiences integrating LLMs. Set technical direction, influence product strategy, mentor engineers, and drive prototypes into reliable, performant production systems at scale.

Own customer-facing features end to end across React/TypeScript front ends, backend services, and APIs. Make product-driven architecture decisions, use telemetry to improve outcomes, and build AI-enabled and agentic experiences with LLMs. Set technical direction, influence product strategy, mentor engineers, and drive ambiguous prototypes into reliable, scalable production systems.

Leads software engineering strategy and development across multiple products and teams. Builds reusable frameworks, architects secure agentic AI engineering workflows, governs responsible AI practices, and operates 24x7 tier-one online services. Translates complex technical issues for leadership, drives adoption of modern development methods, influences senior stakeholders, and delivers scalable cloud-native solutions.

Own technology strategy and architecture for Remitly’s High Value Senders domain. Design scalable web, mobile, and backend systems; solve complex distributed-systems challenges; establish reliability, security, privacy, and quality standards; guide AI adoption; lead architecture reviews; mentor senior engineers; and align technical decisions with customer trust and business outcomes. The role remains hands-on through system analysis, code contributions, prototypes, reviews, and production improvements.

Leads architecture and development of SailPoint’s large-scale, multi-tenant identity security SaaS platform. Translates business strategy into technical roadmaps, designs reliable microservices and infrastructure, drives modernization from monoliths to distributed systems, mentors engineers, reviews designs, delivers code, and communicates technology strategy to executives and stakeholders. The role also requires adoption and oversight of AI-assisted engineering tools and technologies.

Lead the architecture and development of high-throughput streaming infrastructure processing over one million messages per second with sub-second latency. Responsibilities include scaling real-time computation, improving caching, designing message deduplication, enabling zero-downtime deployments, delivering customer-focused projects, shaping the technical roadmap, and mentoring engineers.

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.