Top Senior Software Engineer Jobs in Seattle, WA

Build and ship full-stack web and mobile experiences across Affirm’s consumer products. Break down projects, collaborate with product, design, and analytics teams, develop scalable APIs, write well-tested code, monitor service health, participate in on-call support, review code, and contribute to engineering growth and interviewing.

Build and operate production software, backend services, data pipelines, infrastructure, and workflow automation for autonomous vehicle simulation testing. Automate test creation, execution, validation, monitoring, and maintenance while integrating evaluation systems and partner tools. Lead technical design, code reviews, architecture, and cross-functional execution across autonomy, safety, systems, data, and infrastructure teams. Improve reliability, observability, quality, and scalability of simulation testing through cloud-native engineering and analytics.

Leads architecture and development of scalable, high-availability software systems supporting millions of endpoints. Owns complex multi-team initiatives, makes technical decisions, mentors engineers, establishes engineering standards, and improves software quality. Requires deep Java development, distributed systems, API design, database engineering, system scalability, testing, and AI-assisted development experience.

Leads the development and deployment of software and data solutions using Palantir Foundry and AI/ML technologies. Responsibilities include data engineering, analytics, system improvement, client account management, project ownership, team leadership, coaching, stakeholder engagement, and continuous improvement. The role requires building scalable applications with large datasets and delivering customer-focused solutions.

Design and implement distributed, exabyte-scale S3-compatible object storage for AI workloads. Improve storage reliability, durability, security, observability, throughput, and latency using technologies such as RDMA, GPU Direct Storage, and distributed filesystem protocols. Collaborate with infrastructure, platform, product, and operations teams to deploy and troubleshoot production systems, develop monitoring dashboards, analyze telemetry, and mentor engineers.

Build and operate an agentic SOC investigation platform using LLMs, including telemetry tools, investigation workflows, evidence-backed outputs, evaluation systems, and analyst productivity features. Develop secure, reliable, observable backend services that handle attacker-influenced data across customer environments. Collaborate with SOC analysts, researchers, technical leads, and product managers to translate investigative expertise into production agent behavior.

Own the architecture and technical direction of a high-volume recognition platform spanning edge ingestion, identity resolution, real-time decisioning, notifications, and operator tools. Lead streaming pipeline design, privacy and consent models, observability, reliability, testing, progressive delivery, RFCs, cross-functional alignment, and mentorship. Build systems that combine deterministic rules with probabilistic computer vision signals under physical-world deployment constraints.

Designs, builds, and operates scalable machine learning platform capabilities across feature engineering, model training, inference, monitoring, and lifecycle management. The role delivers reliable software and infrastructure, improves platform performance and observability, influences architecture and technical standards, and partners with engineering stakeholders to safely integrate AI/ML solutions at scale.

Design and deliver scalable, secure software systems for Bankrate’s digital products. Responsibilities include shaping architecture, developing APIs and cloud services, optimizing CI/CD pipelines, partnering with product and design, delivering large initiatives independently, resolving cross-team technical issues, mentoring engineers, improving engineering standards, and evaluating tools that enhance reliability, performance, and team productivity.

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.

Design, implement, and manage Azure network infrastructure and secure HRE segments. Configure firewalls, proxies, VPNs, and monitor traffic. Automate deployments with IaC and scripting, lead Tier 3 incident response and root-cause analysis, optimize performance, and ensure compliance with security standards.

Build and improve scalable, reliable cloud security services for Microsoft Defender in government environments. Design and automate service-scale features, support complex cloud engineering systems, investigate production issues, deploy fixes, and participate in a 24/7 on-call rotation within a secure facility. Collaborate with software engineers, program managers, security researchers, and data scientists while supporting CI/CD and large-scale production services.

Lead technical vision, architecture, and cross-team engineering initiatives for scalable data integration systems. Design, build, review, and optimize secure, reliable software while resolving complex technical issues. Partner with product, design, data science, security, and engineering teams to influence roadmaps and shared platforms. Mentor engineers, conduct design and code reviews, and develop technical leadership across the organization.

Design, build, and operate distributed platform systems that improve developer productivity, reliability, performance, and security. Develop AI-assisted engineering workflows, automated validation, progressive delivery, observability, and recovery tools. Own features from design through production adoption, collaborate across teams, contribute to technical direction, mentor engineers, and turn prototypes into reliable platform capabilities.

Design, build, and operate secure distributed systems, engineering platforms, tooling, and automation for security, compliance, sovereign cloud readiness, and developer productivity. Apply AI-first and agentic engineering practices, develop data-driven solutions, partner across organizations, influence technical strategy, and mentor engineers. The role involves hands-on implementation and operation of scalable Azure-based platforms and services.

Design, build, and operate cloud-native telemetry and observability infrastructure for Azure Monitor. Own end-to-end features, participate in on-call incident response, collaborate across platform teams, and apply AI and cloud technologies to improve reliability and diagnostics.

Design and build scalable software and distributed systems that automate Microsoft 365 capacity delivery across Azure infrastructure. Responsibilities include provisioning, validation, allocation, decommissioning, intelligent workflow automation, telemetry analysis, reliability improvements, technical design, testing, operational readiness, cross-team collaboration, and mentoring engineers.

Design and implement core features for a lightweight macOS security sensor, collaborate cross-platform with teams, own feature lifecycle from design through delivery, debug low-level memory and performance issues, and mentor distributed engineers while aligning sensor architecture with broader Falcon Host strategy.

Build, test, deploy, and operate production-grade AI-powered applications, agents, services, integrations, and workflows. Translate business requirements into scalable technical solutions, use AI-assisted development tools, and apply software engineering practices including testing, CI/CD, observability, documentation, and code reviews. Develop reusable engineering components while addressing security, privacy, compliance, reliability, and Responsible AI requirements.

Design, implement, debug, and integrate software for Android-based devices and embedded platforms. Lead connectivity capabilities involving Wi-Fi, Bluetooth, BLE, USB, and device protocols. Bring up hardware, diagnose system-level issues across OS, drivers, firmware, chipsets, and peripherals, and develop automated verification and diagnostic tooling. Collaborate with hardware, cloud, security, and product teams while guiding engineers and driving capabilities through validation and release.

Lead architecture and design for highly available cloud services in an AI-first engineering environment. Drive adoption of AI-assisted development tools, mentor engineers, perform code and architecture reviews, and build scalable backend services with strong availability and latency requirements while collaborating with Product and Design.

Improve the performance, scalability, architecture, reliability, and responsiveness of Office web applications. Lead cross-team technical initiatives, use telemetry and profiling to resolve issues, apply agentic AI to development and modernization, mentor engineers, establish quality practices, and support production systems through on-call participation.

Design and lead architecture for agentic reliability and observability platforms. Build automated detection, triage, mitigation, and safe remediation systems. Drive operational standards (SLOs, alert quality, incident automation), influence partner teams, run live-site investigations, convert reliability gaps into platform investments, and mentor engineers on monitoring, incident response, and AI-assisted automation.

Leads architecture and development of Azure Managed Redis runtime infrastructure, including distributed deployment, upgrade, orchestration, release, and observability systems across 70+ regions. Integrates Redis Enterprise into Azure while maintaining availability, consistency, performance, and operational excellence. Builds production code in C# and Go and applies AI, LLMs, and anomaly detection to improve engineering workflows, reliability, and fleet operations.

Build and optimize frontend advertising experiences and rendering libraries across platforms. Collaborate with design, product, and partner teams on UX, analyze ad-stack performance using data and monitoring systems, and drive improvements across complex, multilingual, multi-region, cross-platform web applications.