Top Software Engineer Jobs in Seattle, WA

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 and build scalable backend services for real-time distribution of orders, ensuring reliability and operational excellence in a fast-paced environment.

The Staff Backend Engineer will lead the development of OXIO's telecom platform, focusing on backend systems, architecture, and scalable solutions. They will utilize multiple languages and cloud services while collaborating with stakeholders to innovate telecom apps.

The Staff Backend Engineer will design and scale core systems for a B2B SaaS platform, focusing on backend architecture, reliability, and AI-assisted engineering workflows.

Design and build PostHog's observability stack (logs, traces, metrics) to ingest, store, and retrieve petabyte-scale telemetry reliably and cost-effectively. Own product area end-to-end from alpha to GA, make architecture decisions, implement high-throughput distributed systems, and optimize query/storage performance while ensuring data integrity in a multi-tenant SaaS environment.

You will design and implement scalable backend systems integrating August infrastructure with third-party DeFi protocols while collaborating with engineering teams.

Senior Backend Engineer responsible for building and scaling backend systems to enhance the WeightWatchers member experience, ensuring performance and reliability. Responsibilities include developing APIs, improving data management, achieving operational excellence, and mentoring junior engineers.

The Back End Engineer will maintain and enhance various projects, work with product and engineering teams, design REST APIs, and handle cloud technologies while contributing to the vision of Barstool Sports.

Senior full‑stack engineer responsible for building backend services (Node.js/TypeScript) and integrating with frontends (React/Vue). Ship production APIs, collaborate cross‑functionally, own delivery, mentor peers, and develop modular, testable, performant systems across diverse greenfield projects.

The Backend Engineer will implement new SDK and Indexer features, automate testing, support integration, and oversee production releases.

The Staff Backend Engineer will own the Economic Core of Voyagu's Radar platform, focusing on financial systems architecture and ensuring revenue correctness and financial logic implementation across the system.

Design, optimize, and scale ClickUp's search infrastructure using OpenSearch/ElasticSearch. Improve relevance, speed, and real-time indexing; build vector/semantic search capabilities; create measurement frameworks; integrate search with AI and product features; troubleshoot at scale; and mentor junior engineers to maintain high search quality under heavy load.

Develop and maintain scalable backend systems at ClickUp. Collaborate with teams, optimize database queries, debug issues, and foster a culture of learning.

The role involves developing features for Grafana's SaaS platform, mentoring team members, and improving operational systems. Candidates should have experience with distributed systems and strong coding skills, particularly in Golang.

As a Staff Backend Engineer for Tempo, you'll lead technical initiatives, own core component architecture, drive operational excellence, mentor engineers, and contribute to open-source projects, focusing on enhancing Grafana's tracing capabilities and API development.

Design, build, and maintain scalable backend services and data interfaces. Develop REST/GraphQL APIs, implement data ingestion/transformation, integrate with databases and third-party platforms, ensure security, reliability, and observability, and support CI/CD and infrastructure-as-code workflows.

Design, build, and operate high-scale backend APIs, services, event-driven workflows, queues, background jobs, caching, and integrations. Lead ambiguous technical initiatives from discovery through production, improve reliability and performance, debug complex production issues, and mentor engineers while partnering cross-functionally to deliver durable backend systems.

Design, build, test, and maintain backend services and APIs for an insurance platform. Integrate external services and data providers, improve system stability, performance, and scalability, participate in architecture discussions, mentor teammates, and support internal tooling and deployment practices.

As a Backend Engineer at Coral AI, you will design and build scalable backend systems, collaborate with teams, enforce best practices, and mentor engineers.

Design, develop, and maintain scalable, secure backend systems for online gaming. Implement server-side logic in Java, optimize databases, build and maintain APIs, troubleshoot performance bottlenecks, collaborate with frontend and cross-functional teams, participate in code reviews, and contribute to technical documentation and architecture improvements.

Lead design, development, and maintenance of scalable, secure APIs and integrations. Drive API architecture, governance, automation, and self-service tooling. Ensure reliable, high-performance integrations, mentor and onboard team members, and deliver impactful digital integration features.

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.

Build and maintain backend services and APIs for onboarding, accounts, payments, cards, transfers, rewards, FX, KYC and risk. Design reliable, secure, observable systems, integrate with partners and AI services, ensure data integrity and incident handling, and collaborate with product and frontend teams to launch and improve financial products at scale.

Design, build, and maintain backend workflow orchestration and state management for analyzer integrations on the ECL platform. Modernize legacy .NET systems, ensure reliable event-driven operations, collaborate with integration, infrastructure, and QA teams, and preserve workflow behavior during knowledge transfer.

Build and scale a live ML data streaming analytics platform, lead greenfield real-time processing projects (Python/Rust), and design reliable backend services using cloud and orchestration tools.