Top Software Engineer Jobs in Seattle, WA

The Senior Backend Engineer will develop cloud-based systems for cybersecurity, focusing on scalability and reliability, using languages like Go and Python. Collaboration and mentorship are key components.

Design, build, and own backend services for prediction markets across market lifecycle: creation, trading, oracle resolution, settlement, and payouts. Build low-latency, high-throughput microservices and event-driven systems, drive reliability via SLOs and observability, lead incident response, set technical standards, and mentor engineers while partnering cross-functionally to deliver product and compliance-aligned roadmaps.

Design and implement Kotlin backend services and end-to-end systems for Toast POS device management. Lead technical designs, estimations, performance optimization, cross-team collaboration, and software quality practices including modern testing and observability. Mentor peers and drive product roadmap alignment with product, hardware, and QA stakeholders.

Design, implement, and optimize high-performance backend systems in Rust for an xOT security platform. Participate across the development lifecycle—debugging, testing, and performance tuning—while integrating relational and NoSQL data stores, microservices, third-party devices, and AI tools. Provide technical leadership, code review feedback, and promote secure, reliable, observable distributed systems.

Design, build, and maintain backend services and APIs using Ruby on Rails. Improve performance, scalability, reliability, and write well-tested production code. Collaborate with Product, Frontend, Data Engineering, and QA teams.

As a Senior Software Engineer, you will enhance data pipelines, integrate with EHR systems, and mentor fellow engineers while ensuring scalable and reliable solutions for health technology.

Lead backend and full-stack work on the Payments team, building multi-gateway integrations (Stripe, PayPal), payment APIs, and customer payment UIs. Ensure secure, compliant (PCI-DSS) payment flows, reliability, observability, and scalability across AWS/Kubernetes microservices. Partner cross-functionally to design architecture, implement settlement/reconciliation, and maintain high availability.

Lead technical strategy and execution for a backend ledger team building highly available, audit-grade financial systems. Drive architecture, reliability, monitoring, on-call practices, code quality, cross-functional collaboration, and mentoring to ensure accurate, scalable ledger operations.

Develop, maintain, and optimize mission-critical backend APIs and scalable cloud services for web and mobile clients. Implement secure, high-performance systems, automated tests, observability, and technical documentation. Mentor peers, follow best practices, and support a proof-of-concept launch and fundraising activities as a volunteer contributor.

Seeking a Back-End Developer to design, develop, and maintain server-side applications, particularly CRM software solutions in a collaborative remote environment.

Nango is hiring Senior and Staff Backend Engineers to design, build, and optimize backend systems and APIs, collaborating with customers and driving product strategy.

As a Backend Engineer, you will own end-to-end backend systems, build reliable APIs on Node and AWS, and implement scalable architectures. You will be responsible for high-quality production code delivery, establish best practices, and interface with product teams to enhance financial product performance.

Lead design, build, and maintenance of scalable, secure blockchain participation and custody infrastructure. Improve automation, monitoring, incident response, and observability; debug distributed protocols; inform leadership strategy; scope product opportunities; and support on-call reliability and deployment automation.

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.

Design and build a centralized reliability platform and developer-facing APIs. Implement AI agents for incident triage, log/trace summarization, and recommended actions. Own projects end-to-end and collaborate with product, infra, data, and SRE teams.

Design and scale core backend systems for a multimodal conversational AI platform, optimize realtime audio/AI pipelines for low latency, improve reliability and analytics, drive engineering standards and code quality.

Own and develop backend services powering 270/271 benefit estimates, claims adjudication integrations, and claims processing pipelines. Build performant APIs and queries, manage data in PostgreSQL/Redis/BigQuery, improve reliability and throughput, write integration documentation, participate in code reviews and incident response, and join the on-call rotation.

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.

The Backend Engineer will design and scale distributed systems, improve performance, manage data services, and contribute to architecture decisions.

The Staff Backend Engineer will architect and implement a scalable, reliable workflow engine, focusing on extreme availability and integrating AI for automation.

The Senior Software Engineer will design and develop scalable applications, enhance DevOps practices, and drive continuous improvement within infrastructure and systems.

As a Software Engineer, you'll design, build, and maintain IAM solutions, ensuring security and reliability while working with cloud computing standards.

Lead technical strategy and hands-on engineering for Airbnb's AI-powered ads growth engine. Architect scalable systems for creative generation, bidding, budget optimization, and audience management across paid channels. Write and review code, set standards for availability and quality, collaborate with Marketing/Product/ML teams, roll out staged automation, and mentor engineers to advance platform autonomy while ensuring brand safety and human-in-the-loop controls.

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.

Lead the architectural design and implementation of a highly scalable workflow engine for Coupang, ensuring extreme availability and AI integration while collaborating across teams.