Top Senior Engineer Jobs in Seattle, WA

Leads architecture, development, deployment, and optimization of enterprise LLM and GNN serving platforms across AWS, cloud, and on-premises environments. Establishes MLOps and LLMOps strategies, agentic AI engineering standards, automation, governance, observability, and operational practices. Optimizes inference for throughput and latency using Triton and vLLM, partners with data science and SRE teams, and influences senior stakeholders on secure, responsible AI adoption.

Lead full‑stack design and delivery of customer‑facing web and mobile features across frontend and backend systems. Own architecture, ship reliable and observable services, mentor engineers, drive process and cross‑team designs, participate in on‑call rotation, and collaborate with product, design, and analytics.

Build a zero-to-one fullstack product for Remitly Business, design secure scalable frontend and backend systems, set technical standards, lead and decompose team projects, mentor engineers, ensure reliability and observability, and collaborate cross-functionally. Hybrid role based in Seattle.

Lead design and implementation of the CrowdStrike Falcon Host endpoint sensor across Windows, macOS, and Linux. Architect and deliver cross-platform features touching file system, memory, process, and networking subsystems. Own features end-to-end, debug low-level issues, mentor teammates, collaborate with distributed teams, and apply AI to improve detection and decision-making.

As a Sr. Software Engineer in Embedded Systems, you will design, develop, and maintain embedded software for robotics products, collaborate with cross-functional teams, and solve complex engineering challenges.

As a Security Production Engineer, you'll ensure security systems' reliability, develop automation, collaborate on performance optimization, and mentor team members.

Own and evolve a Kubernetes-native test framework that qualifies host images on real hardware. Build test harnesses, extend coverage into HPC, Slurm-on-Kubernetes and firmware/hardware, keep CI fast and reliable at fleet scale, and own results, reporting, and triage. Collaborate with kernel, firmware, imaging, and HPC teams and explore LLM-driven log triage and failure classification.

Debug and fix complex kernel and container runtime interactions for a large GPU fleet: investigate kernel crashes, cgroup and namespace edge cases, and scheduler/memory issues; develop and upstream kernel or container-runtime patches; build observability tooling and partner with hardware, platform, and fleet teams during incident response.

Build and operate a hyper-scale data lake and analytics platform: develop Java microservices and Spark/Scala/Flink pipelines, own a new graph database, design ultra-high-scale data platforms, optimize performance and latency, enable efficient querying for analytics and ML, and collaborate on feature design and stability across teams.

Design, build, and operate scalable services and distributed systems supporting agentic AI capabilities. Lead system, API, and data architecture; integrate AI/ML solutions across development and production environments; establish standards for reliability, security, testing, observability, and compliance; partner cross-functionally on technical direction; and mentor engineers while building reusable AI tools, orchestration layers, and safeguards.

Develops structural test plans, procedures, hardware, software, and integrated test systems for aerospace products. Conducts structural testing, validates test data, publishes reports, researches improved testing technologies, and collaborates with multidisciplinary project teams. Manages multiple projects while ensuring compliance with customer, regulatory, and company requirements.

The Senior Engineer collaborates with teams, designs and implements technical features, writes production-ready code, and ensures high-quality deliverables, while also engaging in research and learning on new technologies.

Design, build, and operate globally distributed storage systems; own code from design to release; provision and benchmark storage hardware; model failure domains; build observability, runbooks, and automation; collaborate across teams to ensure reliability, performance, and scalability.

Design and implement foundational layers of next-generation distributed storage and streaming systems. Own code end-to-end, architect consistency models, optimize storage engine performance, design data-centric APIs, and debug complex race conditions, partitions, and infrastructure-level failures. Work across system layers using Rust/C++ and interact with JavaScript/TypeScript as needed.

Build and maintain Cloudflare’s globally distributed Quicksilver key-value store using Go and C. Develop features, improve CPU and memory performance, enhance monitoring and operational tooling, and debug complex, hard-to-reproduce issues across the software stack. Responsibilities include code reviews, testing, deployments, rollbacks, operations, alerting, and on-call support for a system operating across tens of thousands of servers and hundreds of data centers.

Build and advance application and product security across the engineering organization. Responsibilities include establishing secure defaults, CI guardrails, security requirements, threat modeling, risk assessments, penetration testing, vulnerability remediation, secure coding education, roadmap ownership, and hands-on code review. The role partners closely with product, engineering, DevOps, and services teams to secure applications, microservices, and AI features while enabling efficient development.

Develop and maintain data-protection features in CrowdStrike Falcon sensor on Windows, working across kernel and user mode. Implement filesystem minifilter drivers, AI-aware detection/protection logic, debug kernel issues, own features end-to-end, and collaborate with cross-functional teams to ship and support endpoint data security capabilities.

Design and implement Windows sensor detection and prevention features for the Falcon platform. Research attack techniques, develop user- and kernel-mode detection logic, own features from design through release, apply secure coding and CI/CD practices, troubleshoot customer issues, and collaborate across teams to improve telemetry and protections.

Lead architecture and implementation of reliability improvements across CrowdStrike's cloud-native platform. Build shared libraries and services, drive observability and SLO practices, perform performance and cost optimization, run resilience engineering and chaos experiments, automate infrastructure-as-code, mentor engineers, and embed with product teams to deliver scalable, highly reliable distributed systems at organizational scale.

Develop and lead front-end web applications and APIs for Chewy's Discovery experience. Collaborate with product, design, data science, and infrastructure teams to optimize search, recommendations, performance, scalability, and 24x7 service reliability. Drive architecture, testing, deployment best practices, and technical leadership across the organization.

Lead incident response and threat hunting efforts at CoreWeave, owning cybersecurity incidents end-to-end and developing AI-powered tools to enhance defense against threats.

Design and develop primary and secondary structural components for next-generation UAVs through concept, CAD modeling, detailed design, verification testing, and production release. Collaborate with multidisciplinary teams, perform hand calculations and limited FEA, produce drawings and documentation, support manufacturing and flight test, and improve structural design practices.

Lead end-to-end propulsion test campaigns for a low-bypass turbofan Group 5 UAV: design test stands and instrumentation, execute ground tests, analyze data, drive anomaly investigations, and coordinate test-to-flight handoffs with cross-functional teams.

Lead design and execution of mechanical and structural test plans, build and operate hydraulic test fixtures, integrate and calibrate sensors, automate data collection and analysis with Python, produce technical reports, perform CAD design and collaborate across engineering teams to validate hardware performance.

Lead design, development, and testing of a deployable launch and recovery system for a next-generation UAS. Create CAD models and manufacturing drawings, perform structural, thermal, and fatigue analyses, oversee prototyping and validation, integrate launcher with aircraft systems, and support flight test campaigns and supplier production for field-deployable military operations.