Top Principal Engineer Jobs in Seattle, WA

Serves as the senior technical authority and system architect for GM’s physical and virtual test platform ecosystem. Defines long-term architecture, roadmaps, APIs, interfaces, ownership boundaries, and AI strategy across test, simulation, automation, infrastructure, and operations. Leads complex investigations, drives cross-functional technical decisions, mentors senior engineers, and improves platform reuse, reliability, scalability, throughput, asset readiness, and adoption.

Build and operate Cloudflare’s edge CDN proxy services, caching systems, customer speed products, and origin connectivity. Lead small engineering groups, deliver high-performance software at large scale, manage concurrent projects, collaborate across teams, and develop customer-focused solutions that improve Internet content delivery speed and reliability.

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.

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.

Implements site reliability engineering practices, automation, monitoring, and infrastructure improvements to increase system resilience and deployment efficiency. Collaborates across teams to adopt Agile and DevOps methods, resolves complex technical issues, reduces incidents and manual effort, and supports reliable digital infrastructure. The role also requires mentoring, capacity planning, incident management, scripting, and continuous technical learning.

Designs, implements, and deploys scalable software, cloud, identity, and platform solutions. Leads engineering projects, develops architectures and system improvements, resolves complex technical issues, documents designs, evaluates technology strategies, and mentors engineers. The role influences organization-wide technology and policy decisions while supporting highly available environments and improved operational efficiency.

Principal Engineer responsible for defining the long-term architecture and modernization strategy for GitLab’s Fulfillment platform. The role drives technical direction across entitlements, licensing, provisioning, seat management, usage visibility, and cost management. Responsibilities include hands-on distributed systems engineering, migrations, performance and reliability improvements, cross-team influence, AI-assisted engineering adoption, and mentoring senior technical staff.

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.

Leads pre-silicon quality engineering for high-speed I/O subsystems including DDR, PCIe, eUSB, and SerDes. Drives DFX metric closure, validates silicon-to-simulation correlation, analyzes eye diagrams, BER, margining, and BIST data, and develops test automation and visualization scripts. Chairs TPIP councils and collaborates with vendors, architects, integration, validation, package, and SIPI teams to ensure quality across upcoming systems-on-chip.

Own the company-wide cloud networking strategy and architecture across AWS, multi-region and multi-cluster environments. Lead network automation, AI-enabled infrastructure operations, progressive delivery, observability, security standards, and major incident response. Partner with engineering, security, compliance, SRE, and executives to deliver resilient, scalable networking. Mentor senior technical staff and guide multi-year, cross-functional initiatives.

Designs, tests, and verifies analog circuits and systems for high-performance accelerometers. Responsibilities include requirements analysis, simulations, data analysis, test procedure development, design reviews, supplier coordination, and support for new product development. The role collaborates with mechanical, systems, and manufacturing teams while managing technical work to schedule and budget and reporting status to leadership and customers.

Defines enterprise technology strategy and architecture for Finance, HR, productivity, and collaboration systems. Leads cross-functional platform modernization, integrations, security, compliance, resilience, AI automation, and technical standards. Partners with executives and engineering teams to establish roadmaps, evaluate SaaS and cloud solutions, mentor senior engineers, and connect architecture decisions to business outcomes.

Designs and releases propulsion components and assemblies for UAV internal combustion and jet systems. Leads Siemens NX CAD modeling, detailed drawings, GD&T, design standards, manufacturability, configuration control, BOM management, and work instructions. Collaborates with production, machinists, technicians, and responsible engineers to resolve hardware issues, support testing, investigate root causes, and implement design improvements. Applies engineering analysis and tools such as ANSYS, FEA, GFSSP, and REFPROP.

Principal Software Engineer responsible for owning customer-facing products end to end, leading technical strategy, architecting large-scale distributed systems, and delivering AI-native experiences. The role involves full-stack implementation, product strategy, system design, code reviews, reliability, testing, telemetry, security, performance, and mentoring engineers. Candidates must have extensive experience building and operating large-scale systems and strong product, UX, communication, and collaboration skills.

Provides hands-on technical leadership for enterprise Data Trust platforms. Designs and operates distributed systems supporting data contracts, metadata, lineage, quality, privacy, access controls, reliability, and semantic context for analytics and AI. Leads batch and streaming capabilities across Snowflake, AWS, and Kafka; establishes observability, SLOs, automated enforcement, and operational rigor. Drives cross-functional architecture and multi-quarter initiatives while mentoring engineers and building reusable platform standards.

Leads research, analysis, design, development, simulation, and validation of advanced aerospace navigation algorithms and systems. Provides technical direction, mentors engineering teams, shapes technology roadmaps, and integrates sensor-fusion solutions into aerospace platforms. The role emphasizes resilient navigation in GPS-denied environments, regulatory compliance, hardware-in-the-loop testing, high-performance embedded computing, and transitioning research innovations into operational products.

Principal Software Engineer leading avionics software development for airborne traffic, collision avoidance, and surveillance systems. Responsibilities include mentoring engineers, defining requirements, designing and testing software, conducting code reviews, managing risks, engaging customers, and delivering projects on schedule and within budget. The role requires deep software architecture expertise, proficiency in C, C++, and Assembly, and extensive experience supporting avionics, navigation, and airborne surveillance functions.

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.

Principal Software Engineer role at Atlassian with flexible remote, office, or hybrid work options. The provided description primarily details compensation, benefits, company culture, equal employment practices, and employment verification requirements; specific responsibilities and technical qualifications are not included.

Provides technical leadership on complex software projects from design through launch, addressing architecture, reliability, security, testing, and observability at scale. Leads company-wide engineering initiatives, establishes technical standards, mentors engineers, and promotes engineering excellence. Requires extensive full-stack development experience, strong communication, systems engineering expertise, customer-focused decision-making, and familiarity with A/B testing.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

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.

Lead DoD systems development programs using MBSE, SysML, Cameo, and digital engineering practices. Architect systems, guide teams through the systems engineering lifecycle, establish requirements traceability, customize and automate modeling tools, mentor engineers, and collaborate with software and domain experts. The role supports software-intensive, open-architecture systems across defense mission areas and requires an active Secret clearance with eligibility for Top Secret.

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.