Top Backend Engineer Jobs in Seattle, WA

Design, build, and maintain scalable backend services and APIs for commerce workflows using Python/Django. Improve reliability, performance, and observability, operate AWS deployments, work with PostgreSQL and event-driven architectures (SNS/SQS), modernize legacy systems, and support CI/CD, testing, and production troubleshooting.

Senior backend-leaning full-stack engineer to design, build, and ship Rails + Hotwire features end-to-end. Own data modeling, PostgreSQL schema and performance, background job architecture, APIs, and scalability. Collaborate cross-functionally, conduct code reviews, and drive engineering best practices.

You will tackle AI challenges, develop scalable software and collaborate with teams to enhance healthcare navigation using AI solutions.

Design, build, test, and maintain backend services and APIs powering the insurance platform. Integrate payments, documents, and data providers, improve system stability, performance, and scalability, mentor team members, and participate in architectural decisions and agile ceremonies.

The Software Development Engineer III will design, build, and maintain reliable backend services for flight bookings, focusing on high performance and scalability while collaborating with cross-functional teams.

As a Senior Backend Engineer at DuckDuckGo, you'll lead backend projects, mentor engineers, and develop AI-enhanced features for the company's privacy-centric product line.

Design and implement secure, scalable backend services for voice agents, integrate AI models and telephony, improve inference, debug concurrent systems, and collaborate with Product to deliver features end-to-end.

Design, develop, and scale backend microservices and real-time event-processing systems using Java and Spring Boot. Build event-driven architectures with Apache Kafka, deploy containerized services on AWS EKS, integrate AWS services, design secure RESTful APIs, implement complex business logic, and ensure performance, testing, and observability for distributed systems.

Staff Backend Engineer responsible for leading complex engineering projects, designing scalable systems, mentoring junior engineers, and enhancing platform performance at Socure.

Design and build robust backend services and secure APIs for finance and reader applications. Implement authentication, payments, subscriptions, and finance workflows. Design Postgres/Redis schemas, integrate with financial APIs (BSE Star MF, NSE) and DRM services, and ensure compliance-friendly data handling.

Technical lead for public-facing gRPC APIs and SDKs powering provider search, ranking, and dynamic copay lookups. Own API design, versioning, ranking/steerage logic, and reliability at scale. Write and review code and designs, mentor engineers, drive technical direction, partner with product and partner engineering, and support production operations and scaling decisions.

Design and implement scalable backend services for payment and transaction workflows using Java. Own end-to-end features from data model and APIs to Angular frontends, improve reliability and performance, refactor legacy systems, troubleshoot production issues, and collaborate with product and design. Leverage AI-assisted development tools responsibly and share best practices across the team.

The Staff Software Engineer will lead technical strategy, ensure system availability, and develop backend systems at scale, collaborating across teams to drive capacity modeling and operational quality.

Design and implement secure, scalable backend services for speech inference and audio processing. Optimize networking, transcoding, latency, memory, and distributed compute orchestration. Measure and improve system performance, debug complex networking/scheduling/HPC issues, customize services for customers, and partner with Product to deliver features end-to-end.

Lead the design of a distributed backend streaming engine with a focus on high availability and AI integration, ensuring low latency and high throughput.

Lead and deliver quarterly goals for a backend team; guide engineers through ambiguous problems; collaborate with product, design, and analytics; identify and resolve project and technical issues; ensure operational availability and on-call readiness; set code and design quality standards; and mentor and develop team members.

Design, build, test, and support EPIC integration solutions across the full interface lifecycle. Gather requirements, resolve integration issues, develop standards and documentation, and provide production support within a remote, volunteer, part-time setup.

Build and ship backend systems and robust architectures for SMB and enterprise restaurant customers. Drive end-to-end development including planning, CI/CD, and productionization. Collaborate on product roadmap, iterate from user feedback, and contribute to team culture and growth.

The Back-end Engineer will develop and maintain services and APIs, design data models, and contribute to system stability, collaborating with other engineers and product managers.

Design, develop, and maintain scalable Java/Micronaut enterprise frameworks and cloud-native microservices on Azure. Build and deploy services to AKS, create CI/CD pipelines with Azure DevOps, implement batch/asynchronous workflows, integrate messaging systems, optimize databases, and ensure security, observability, and resilience.

As a Backend Engineer, you'll design and implement systems for decentralized applications, enhance scalability, and collaborate with the team.

The Software Engineer, Backend Engineer will develop, automate, and maintain core functionalities for Rescale customers, focusing on backend systems and cloud services.

The Backend Engineer will develop infrastructure for product integration, create documentation for team training, and influence technology decisions.

Own architecture and delivery of core ledger and transaction processing systems. Design and build highly available, high-performance backend services, drive cross-team technical initiatives, establish platform standards, mentor engineers, and embed AI to improve operations and workflows.

Build and maintain backend services and APIs, write unit tests, debug and optimize systems, support migration from Supabase to cloud, improve reliability, and integrate AI/RPA workflows while learning under senior mentorship.