Top Software Engineer Jobs in Seattle, WA

Build and maintain scalable full-stack web applications for Snap’s user-facing products. Develop interfaces and services, optimize performance, contribute to shared libraries, analyze operational and engagement metrics, and use AI-assisted workflows while maintaining code quality, security, scalability, and production readiness.

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.

Paid 12-week software engineering internship involving coding and shipping product features, full-lifecycle development, technical training, mentorship, and collaboration on Atlassian cloud and core products. Interns will apply programming, data structures, algorithms, and software design fundamentals while working with senior engineers. Preferred experience includes prior software engineering projects or internships, AI/ML exposure, and familiarity with design patterns.

Build and operate high-throughput backend services for AI agents, calendar, scheduling, integrations, real-time data pipelines, and APIs. Design platform infrastructure, event-driven systems, and client-server protocols using Go, PostgreSQL, Kubernetes, and cloud platforms. Collaborate with AI, product, and frontend teams, improve reliability through testing and infrastructure as code, and mentor junior engineers.

Develop and maintain scalable Python software, integrations, and web applications. Collaborate with QA, IT operations, analysts, and stakeholders in an Agile/Scrum environment. Design technical solutions, translate workflows into requirements, participate in code reviews and Scrum ceremonies, optimize relational and non-relational database queries, troubleshoot production issues, and improve application performance and security.

Develop scalable, resilient full-stack software for Redfin’s high-traffic rental search experiences. Build consumer-facing ReactJS interfaces, Java services, data ingestion pipelines, and supporting infrastructure on AWS. Apply AI to improve development efficiency, balance infrastructure and business trade-offs, collaborate with product and engineering stakeholders, lead features, and participate in on-call support for production reliability.

Develop, test, support, and troubleshoot production software for a TLD registry platform. Collaborate with experienced engineers to build scalable, reliable solutions using cloud technologies, databases, web applications, services, and background systems. Participate throughout the software development lifecycle, provide on-call support, identify root causes, and improve system performance and maintainability while supporting global business operations.

Lead complex card payments acquiring projects from design through production, building and operating highly reliable systems. Apply deep ISO 8583 and card-network expertise to routing, authorization, capture, clearing, settlement, reconciliation, and processing costs. Write production code, develop certification tooling, debug payment messages, establish reusable standards, mentor engineers, use AI coding agents responsibly, and participate in on-call support for critical financial systems.

The Founding Engineer will lead the development of Sailor Health's AI-powered platform, building systems for patient care and mentor the engineering team.

Lead end-to-end development of scalable customer-facing software, APIs, and platform capabilities. Build AI-powered workflows using LLMs and agentic technologies, collaborate with Product, Design, ML, and platform teams, and drive architectural decisions, technical initiatives, customer validation, rollout, and operational excellence.

Lead the development of an AI-powered platform for senior mental health, building systems for patient experience, and mentoring the engineering team.

Design and operate scalable Kotlin or Java backend services and React interfaces supporting high-throughput advertising systems. Build microservices, APIs, event-driven systems, real-time data flows, and data-intensive search capabilities using technologies including Kafka, Redis, Elasticsearch, AWS, Docker, and Kubernetes. Drive architecture, reliability, CI/CD, troubleshooting, and performance optimization while collaborating cross-functionally and mentoring junior engineers.

Design, build, and maintain full-stack products and services for Expedia’s traveler experiences. Own features across system design, implementation, testing, deployment, monitoring, and support. Collaborate with product, design, data, and engineering teams; lead technical discussions; improve reliability, performance, accessibility, and security; use experimentation and analytics to measure outcomes; and mentor teammates while applying AI-assisted engineering responsibly.

Build the core AI platform for an AI-native trading experience. Develop a high-performance Rust backend supporting streaming responses, low-latency tool execution, caching, and model orchestration. Design secure, observable APIs and runtime components with authentication, authorization, rate limiting, auditing, tracing, retries, and fallbacks. Build safe trading action infrastructure with deterministic previews, confirmations, idempotency, and audit logs while partnering with product and frontend teams.

Build and ship full-stack features using LLMs and agentic systems for text analytics. Develop reliable backend and frontend functionality, collaborate across engineering and product teams, participate in code reviews and testing, and manage project dependencies through delivery. The role also involves learning Java, Spring, AWS technologies, AI tooling, and permissioning systems for customer data access.

Designs and develops scalable backend and platform services for payment solutions. Responsibilities include leading software delivery, planning technology improvements, building cloud-based systems, validating security and compliance, improving developer tools and practices, and mentoring engineers. The role collaborates with Product Engineering, Product Management, Infrastructure, and Security teams to deliver reliable, maintainable software.

Develop scalable localization and internationalization systems serving customers across languages and locales. Build translation pipelines, i18n tooling, AI-powered translation integrations, and shared frameworks using technologies such as React Native, TypeScript, Go, Java/Kotlin, and AWS. Collaborate with cross-functional teams, contribute to technical roadmaps, review code, mentor engineers, and improve localized customer experiences.

Build and ship backend features end-to-end using Ruby on Rails and SQL. Lead complex technical projects, solve architecture challenges, establish standards, conduct meaningful code reviews, resolve high-risk bugs, document systems, collaborate across engineering teams, and mentor junior engineers.

Develop and maintain web applications for ForSaleByOwner.com. Implement features, fix bugs, write automated tests, participate in code reviews, document APIs, support users and handle data requests, and participate in on-call rotation. Collaborate with product, design, and engineering teams to ensure scalable, reliable, user-friendly software.

Design, build, test, and maintain cloud-scale services for security-critical and regulated environments. Develop secure, reliable platform components, participate in architecture and code reviews, troubleshoot live-site issues, use telemetry to improve performance, and support 24x7 on-call operations. Collaborate with security, operations, compliance, and program teams while applying secure-by-design, threat modeling, and defense-in-depth practices.

Build and operate globally distributed Azure cloud services, developer tools, and platform components for scalable applications and generative AI workloads. Own features from design through production, participate in on-call rotations, automate incident response, monitor service health, troubleshoot outages, create operational documentation, and perform root-cause analysis. Collaborate across teams while developing software in multiple languages and supporting high-availability cloud services.

Design, develop, deploy, and operate highly available Azure cloud services for sovereign and government environments. Solve distributed-systems and infrastructure problems, drive technical designs and projects end to end, improve reliability through automation and monitoring, collaborate across teams, and mentor engineers.

Build and operate highly scalable, fault-tolerant AI infrastructure on Azure. Responsibilities include designing distributed systems, developing cloud-native platforms with Docker and Kubernetes, productizing AI technologies, and owning solutions through architecture, implementation, testing, deployment, monitoring, security, and continuous improvement.

Design, develop, deploy, and operate an exabyte-scale security data platform. Build cloud services and data ingestion and processing features, write reliable and testable code, troubleshoot production issues, and collaborate on distributed systems using Azure and security technologies.

Leads the design and development of scalable, cloud-native, AI-powered software systems. Drives architecture, DevOps, CI/CD, observability, performance optimization, automation, incident analysis, and continuous improvement. Provides technical guidance through code reviews and architectural decisions, mentors engineers, and collaborates with cross-functional teams to align technical solutions with business objectives.