Top Backend Engineer Jobs in Seattle, WA

Design and build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

As a Backend Engineer, you'll improve Git and Gitaly by contributing features, bug fixes, and performance improvements, collaborating with the open source community, and participating in architectural discussions.

Design, build, and maintain backend services powering Clerkie's platform. Improve reliability, performance, scalability, observability, and support feature development. Participate in technical design, cross-functional collaboration, documentation, and own projects end-to-end in a fast-moving startup environment.

As a Staff Backend Engineer, you'll design and operate backend services, lead technical initiatives, ensure reliability, and mentor team members in a remote-first setup.

As a Staff Engineer for Revenue, you'll shape technical vision and architecture for billing and pricing systems, ensuring correctness while enhancing cross-team collaboration.

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, 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.

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.

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.

Design, develop, test, and maintain backend services and components for high-throughput pricing systems. Contribute to low-level system and API design, own operational quality (monitoring, alerting, logging, on-call), and collaborate with product and partner teams. Apply secure coding, automated testing, and foundational AI/ML concepts to deliver scalable, observable services.

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.

The Backend Engineer will develop features across APIs, CLI tools, and billing systems, mentor team members, and set technical direction.

The Senior Software Engineer will design and implement backend services, manage architectural decisions, and drive improvements in data quality, performance, and reliability, while collaborating across teams to enhance client and provider interactions in mental healthcare.

The Back-End Engineer will design and build core platform services, operate production services, and work on AI-powered features while collaborating with cross-functional teams and mentoring junior engineers.

Lead backend engineer on Merchant and Fraud Prevention team delivering secure, stable, and scalable production software. Design, develop, test, and troubleshoot backend and streaming systems, use SDLC toolchains and CI/CD, work with large data sets, and apply enterprise-authorized AI-assisted development tools while ensuring responsible AI use and operational resiliency.

As a backend engineer, you will enhance data collection systems to ensure reliability and scalability, working closely with engineering and mission teams.

The role involves designing and expanding backend systems, mentoring engineers, and executing technical strategies to modernize architecture and improve system performance.

The role involves owning the architecture and technical direction of Payment Rails infrastructure, designing high-reliability systems for global payment processing, and leading cross-functional collaborations to create efficient, compliant solutions. Responsibilities also include mentoring team members and enhancing operational excellence through AI-driven improvements.

Lead architecture and technical direction for Payments platform, building scalable, fault-tolerant distributed systems, defining roadmaps, ownership of production reliability, cross-functional partnership, and mentoring engineers to improve platform quality and scalability.

The role involves architecture, design, and development of Java-based systems, overseeing projects, and advising clients. Extensive experience in Java development is essential.

The job involves developing applications as a Java developer, focusing on both front-end and back-end development with various technologies.

Looking for Java Developers skilled in Front-end (Java, JQuery, etc.) or Back-end (Java, Spring, SOAP, REST). Requires 3 to 6 years of experience.

Seeking Java developers proficient in backend frameworks like Spring or Hibernate and frontend technologies such as HTML, CSS, and JavaScript.

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.