Top Backend Engineer Jobs in Seattle, WA

Design, build, and improve scalable backend systems, REST APIs, microservices, data-processing systems, and distributed job-processing platforms. Write secure, maintainable, high-performance code; improve engineering practices and tooling; apply test-driven development; debug production issues; and participate in on-call support. The role requires expertise in distributed systems, backend APIs, relational databases, and Node.js, along with strong communication and problem-solving skills.

Design, build, and improve scalable backend systems, including REST APIs, microservices, data-processing pipelines, and distributed job systems. Write secure, maintainable, high-performance code; contribute to engineering standards and tooling; practice test-driven development; debug production issues; and participate in on-call rotations. The role requires experience with highly available distributed systems, scalable backend APIs, technical leadership, and solving ambiguous, high-impact problems.

Design, build, and improve scalable backend systems, including REST APIs, microservices, data processing pipelines, and distributed job systems. Write secure, maintainable, and tested code; troubleshoot production issues; improve engineering practices and tooling; and participate in on-call support. The role requires experience with web applications, Node.js, highly available distributed systems, scalable backend APIs, and relational databases, preferably PostgreSQL.

Develop and enhance backend systems, services, APIs, and core product features. Improve codebase maintainability, reliability, and scalability while operating mission-critical systems in production. Participate in on-call incident resolution, automated monitoring and instrumentation, recruiting, interviewing, and mentoring. The role emphasizes distributed systems, automated testing, continuous integration, and measurable business impact.

Lead architecture, development, and operation of globally scaled payments and billing systems. Own subscription billing, payment providers, invoicing, reconciliation, security, compliance, reliability, and modernization. Use and advance AI-agent workflows for engineering, incident response, testing, and anomaly detection while enforcing strict human review and PCI safeguards. Mentor engineers, guide technical strategy, and collaborate with Product, Finance, Risk, Platform, and Analytics.

Design and implement backend APIs, microservices, and checkout platform components for Affirm’s financial products. Own system health, improve performance and reliability, collaborate across engineering teams, and contribute to technical standards, tooling, and processes. The role requires developing, testing, and shipping high-quality software at scale while making customer-centric technical decisions.

Design, build, and operate scalable backend services and distributed systems supporting live streaming, content, personalization, analytics, and operational tooling. Responsibilities include API and data modeling, cloud infrastructure, event-driven architectures, observability, CI/CD, performance optimization, reliability, security, and production troubleshooting. Collaborate with mobile, video, data, product, and infrastructure teams to deliver highly available services across Tennis Channel platforms.

Build and operate scalable backend and distributed systems for Baseten’s AI inference platform. Responsibilities include telemetry pipelines, observability platforms, billing and commercialization systems, partnership integrations, developer tooling, CI/CD, AI agent infrastructure, testing strategy, reliability improvements, and cross-team technical leadership. The role also involves mentoring engineers, improving developer experience, and partnering across infrastructure, model performance, and product teams.

Build and scale backend services powering an AI scheduling assistant: orchestrate scheduling, email, API and LLM integrations; develop trainer and operations tooling; contribute to architecture and technical direction.

Build and operate highly scalable Go backend services and data infrastructure for the AT Protocol ecosystem. Scale systems to support hundreds of millions of users, hundreds of millions of events, petabytes of NVMe storage, thousands of CPU cores, and tens of terabytes of RAM. Responsibilities include developing mission-critical services, managing production operations, and working with databases, distributed systems, operating systems, networking, and storage technologies.

Build and lead development of high-availability backend services for Affirm’s card loan platform. Design scalable APIs, data models, microservices, and event-driven systems supporting real-time loan attribution, approvals, origination, and refunds. Drive technical strategy, troubleshoot complex performance issues, collaborate with cross-functional teams, and mentor engineers while ensuring long-term system robustness and scalability.

Leads architecture and hands-on development of backend services supporting multi-tenant MSSP partner workflows. Responsibilities include tenant isolation, account hierarchies, delegated administration, API design, reliability, observability, production issue ownership, and mentoring engineers. The role partners across Product and Engineering to deliver secure, reliable cloud-hosted platform capabilities for client and sub-client management.

Designs, develops, and supports scalable Java microservices using Spring Boot and Google Cloud. Responsibilities include SQL and data pipeline development, CI/CD automation with Jenkins, infrastructure as code using Terraform, unit testing, code reviews, production incident resolution, root-cause analysis, agile execution, and mentoring engineering teams.

Build and operate backend services and asynchronous workflows that provision customer accounts, assets, and product entitlements. Own projects from design through production support, ensuring reliable retries, idempotency, observability, testing, and recovery from failures. Collaborate with licensing, Product, administration, partner, and customer-facing teams to improve onboarding and activation paths. Investigate operational issues, address root causes, document systems, and contribute to code reviews and technical problem solving.

Provide hands-on technical leadership for backend services and APIs supporting account administration, authorization, tenant boundaries, account hierarchies, settings, roles, and audit logs. Lead architecture and implementation of complex changes, improve API quality, testing, security, observability, rollout practices, and production readiness. Partner across Product and Engineering, mentor engineers, influence technical direction, document tradeoffs, and diagnose complex production issues.

Develop backend software with end-to-end SDLC ownership using Java, Node.js, or other backend languages. The role requires experience with SaaS, PaaS, or IaaS environments, public cloud platforms such as AWS, GCP, or Azure, and CI/CD pipelines.

Build and maintain data pipelines, PostgreSQL systems, Kubernetes infrastructure, deployment tooling, and SaaS integrations. The role includes infrastructure reliability, observability, incident response, security collaboration, Salesforce data flows, CI/CD, testing, debugging, and agile delivery. The engineer will connect data infrastructure with Techstars OS product teams and improve reliable, secure systems across the organization.

Leads the infrastructure and backend engineering function supporting mobile games, analytics systems, internal products, APIs, and web services. Owns AWS architecture, reliability, security, monitoring, automation, CI/CD, cost optimization, Snowflake data infrastructure, high-volume event pipelines, backend services, game servers, and technical roadmaps. Provides hands-on architecture, implementation, code review, technical leadership, cross-functional collaboration, and end-to-end project ownership.

Design and own backend infrastructure for a privacy-first AI memory platform. Responsibilities include multi-tier memory storage, secure multi-tenant isolation, real-time APIs, caching, LLM integrations, retrieval systems, synchronization, monitoring, deployment pipelines, and production reliability. The role requires close collaboration with ML engineering and product teams while owning architecture, infrastructure, testing, security, and operational troubleshooting.

Lead backend engineering strategy for Affirm’s search and recommendation platform. Design and launch highly available distributed systems, guide technical architecture and execution, improve team operations and reliability, establish engineering quality standards, collaborate with product, design, and analytics, and mentor engineers. The role focuses on search, recommendations, consumer shopping experiences, monetization, and scalable platform foundations.

Develop and scale backend streaming and data infrastructure using Kafka, Flink, AWS, Kubernetes, and related technologies. Break down projects, deliver tested software, collaborate with product and engineering teams, monitor system availability, participate in on-call support, debug code, conduct code reviews, and contribute to team development.

Leads architecture, development, and operation of Python-based AWS backend and IoT services. Designs Lambda microservices, REST APIs, event-driven workflows, telemetry pipelines, databases, device communication, and infrastructure as code. Provides hands-on technical leadership through coding, design and code reviews, mentoring, cross-functional planning, security practices, testing, CI/CD, monitoring, incident response, and roadmap development.

Architect, build, and operate large-scale relational and distributed SQL database infrastructure. Responsibilities include database control-plane automation, provisioning, failover, backups, upgrades, zero-downtime migrations, Kubernetes networking, connection proxy optimization, reliability monitoring, capacity planning, and operational support. The role also leads technical delivery, mentors engineers, establishes quality standards, collaborates cross-functionally, and contributes to team roadmap and on-call operations.

Design, develop, and maintain high-performance Scala/Java server-side applications and RESTful APIs. Work on distributed systems, ensure data integrity and security, write unit tests, optimize performance, participate in design reviews, and mentor junior engineers while supporting CMS mission requirements.

Principal frontend-focused software engineer responsible for leading frontend architecture, standards, tooling, accessibility, performance, testing, and deployment practices. The role delivers scalable customer-facing web applications, component libraries, and design systems using React or Angular. It includes cross-functional product collaboration, technical decision-making, mentoring, modernization initiatives, and occasional full-stack work. The position is remote, requires U.S. citizenship, Public Trust 6C eligibility, and approximately 0–10% business travel.