Top Software Engineer Jobs in Seattle, WA

Design and implement Android features from design through launch, optimize mobile UX and performance, perform code reviews, evaluate technical tradeoffs, and use AI tools to streamline development while maintaining security and production-quality code.

As a Software Engineer at Opendoor, you'll build production systems, own features end-to-end, conduct technical design reviews, and integrate AI tools into workflows while mentoring teammates and enhancing product quality.

Build and maintain Redfin's iOS app features and infrastructure using Swift and SwiftUI. Collaborate with product, design, and engineering through code reviews, documentation, and testing. Contribute to experiments, leverage iOS best practices, and use approved AI code-generation tools. Participate in on-call rotations as needed and work hybrid from Seattle, San Francisco, or Detroit offices on Tuesdays and Wednesdays.

Design, implement, and optimize high-performance iOS features and apps using Objective-C and related technologies. Work with design teams, conduct code reviews, evaluate tradeoffs, leverage AI tools to accelerate development, and ensure performance, multithreading, and low-power optimizations for Snapchat's camera experiences.

Build and ship conversational, AI-assisted Android features and high-performance UI within the Redfin app. Drive architecture for conversational interfaces, collaborate on code quality, documentation, testing, and work with product and design to deliver maintainable, user-centered experiences. May participate in on‑call rotation.

Design, build, and optimize full-stack mobile and desktop web applications. Implement user interfaces, contribute to shared libraries, log and analyze metrics, use AI tools to accelerate development, and maintain high standards for code correctness, security, testing, performance, and scalability.

Design, implement, and operate critical, highly scalable backend services (identity, friend graph, persistence). Collaborate across teams, ensure availability, scalability, operational excellence, and cost management. Build, test, debug, and participate in incident resolution while leveraging AI tools to accelerate development and maintain secure, production-ready code.

Design and implement scalable backend systems for search and conversational AI. Build and productionize services leveraging LLMs, embeddings, and vector search. Lead architecture, mentor engineers, drive cross-team initiatives, and improve developer productivity and operational excellence.

Design, implement, and operate scalable ads delivery backend services. Own serving-time systems, collaborate with Product/ML/Infra, ensure availability and efficiency, use observability and automation, and apply AI-assisted workflows to ship production-quality code and optimize platform architecture.

Build end-to-end fullstack features for a mental healthcare platform: design APIs and UIs, manage clinical and practice-management systems, integrate AI capabilities, and own product outcomes from schema to frontend.

Lead design and implementation of the payment and clearinghouse platforms powering Headway's revenue flows. Build fault-tolerant, observable integrations (Stripe, Plaid, payers), create abstractions for adjacent teams, mentor engineers, and write high-impact code to ensure reliability, throughput, and correct reconciliation of transactions at scale.

Headway seeks a Staff Fullstack Engineer to own end-to-end product work across frontend and backend. You’ll build practice management, patient/provider engagement, AI-enabled clinical systems, onboarding, growth tools, and platform foundations. The role requires technical leadership, cross-functional strategy, mentoring, and shipping scalable, reliable systems in a complex healthcare domain.

Design and build reliable backend services powering clinical data, insurance billing, patient-facing infrastructure, and financial ledger systems. Scale high-integrity systems requiring idempotency, strong consistency, and pragmatic AI integration to automate provider workflows and enable personalized patient experiences.

Design, implement, and operate large-scale backend services (identity, friend graph, persistence). Collaborate across teams to evaluate trade-offs, ensure availability, scalability, and security, participate in incidents, and use AI tools to accelerate development while maintaining code quality and operational excellence.

As a Knowledge Development Engineer, you'll architect and deploy AI-driven production systems, reverse-engineer existing systems, and guide product development. You'll synthesize customer feedback and lead experiments to connect technical development with business outcomes.

The Knowledge Development Engineer leverages AI agents to solve customer problems by building applications and automating workflows, focusing on delivery speed and quality.

Build and own control plane components for Voyage AI within MongoDB Atlas: APIs, Terraform providers, observability, governance, billing pipelines, and multi-tenant integrations. Collaborate with platform, inference, and ML teams to deliver secure, cloud-native, developer-first experiences and migrate legacy Voyage features to Atlas.

Design, implement, and operate critical, highly scalable backend services (identity, friend graph, persistence). Collaborate across teams, build and test distributed systems, ensure availability and operational excellence, use AI tools to accelerate development, and participate in incident response and debugging.

As an AI Native Software Engineer, you'll build products using AI coding agents, translating customer needs into solutions, and ensuring quality delivery and documentation.

As a Forward Deployed Engineer at Remitly, you will leverage AI agents to build applications, translate customer needs, and evaluate outputs for quality and security, focusing on delivery speed and robustness.

As an Agentic Software Engineer, you'll build and deploy production-grade AI systems, reverse-engineer existing software, guide teams, and facilitate customer discovery.

Design and implement complex Android platform projects, drive long-term Android strategy, build core frameworks and tooling, collaborate with product/design and teammates, review code and document best practices, evangelize Android best practices and AI code-generation tools, and participate in on-call rotation to support production systems.

The Software Engineer will enhance the structured data storage layer in Superhuman Docs, ensuring database reliability, performance, and correct data handling under varying workloads. Responsibilities include improving table management, server-side query planning, and collaborating on formula and sync processes.

Design, build, and maintain scalable, reliable full‑stack systems. Contribute to API and architecture design, write testable code, debug complex issues, improve performance, automate deployments, and mentor junior engineers while collaborating with cross‑functional teams.

Design, build, and maintain scalable, reliable systems and APIs across a primarily TypeScript stack. Deliver features independently, improve performance and observability, contribute to architecture and CI/CD, debug complex issues, and mentor junior engineers while collaborating with cross-functional teams.