Top Senior Software Engineer Jobs in Seattle, WA

The Senior Software Engineer will shape technical strategy, mentor engineers, and build financial management tools for restaurants, focusing on cash flow and operational efficiency.

The Senior Software Engineer, Mobile DevOps focuses on enhancing the POS app's development processes, optimizing build speeds, and mentoring team members, ensuring high-quality output using AI tools.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.

The Senior Software Engineer will build scalable backend systems, maintain data workflows, and collaborate across teams to enhance marketing initiatives.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

The Senior Software Engineer for Support AI will develop voice and chat systems for customer support, driving projects from concept to production, while collaborating across teams and improving AI capabilities through integration and data insights.

Develop end-to-end product features, lead projects, shape technical systems, and mentor teammates while collaborating with cross-functional teams.

The role involves developing React Native applications for iOS and Android, collaborating with teams, mentoring developers, and ensuring high-quality code and testing practices.

The Senior Software Engineer will drive the retail technology initiatives at Toast, focusing on payment solutions and enhancing customer experiences. Responsibilities include collaborating on high-impact opportunities, technical decision-making, and adapting to customer needs.

The Senior Software Engineer, Backend will lead projects, build impactful features, and support a collaborative engineering culture, focusing on scalable backend solutions.

Lead quality assurance and test strategy across Agile teams, drive automation for testing, mentor QA teams, and ensure high-quality software delivery.

The Sr. Software Engineer designs, implements, and maintains scalable cloud services, contributes to team processes, and acts as a subject matter expert while leading projects and mentoring others.

As a Senior Software Engineer, you'll enhance servicing decisions with ML models, improve experimentation, and scale decisioning systems for personalized borrower experiences.

The Senior Software Engineer will lead and support a team in developing reliable and scalable backend systems, collaborating on product development, and improving infrastructure for secure communication between services.

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

Join the Query Integration team to enhance MongoDB's query engine, integrating features, improving performance, and contributing C++ code with a focus on database systems.

Design and implement scalable mobile advertising experiences using React Native and Google Mobile Ads SDK. Translate revenue requirements into ad implementations, support native/interstitial/rewarded formats, manage ad configuration/loading/display, ensure performance and user experience, and collaborate with stakeholders while guiding engineering peers on consent management and programmatic advertising.

As a Senior Software Engineer, you will develop secure identity and access systems, mentor other engineers, and ensure privacy principles are embedded in all products.

The Senior Software Engineer will lead projects for the Forms platform, designing and building features across web, mobile, and backend systems while mentoring other engineers and improving platform scalability and reliability.

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

The Senior Software Engineer will design backend services, improve data pipelines, and enhance reporting infrastructure while mentoring other engineers. This role supports capital partners by ensuring accurate data flow through Upstart's platform.

The Senior Software Engineer will design and optimize recommendation algorithms, maintain data pipelines, and improve personalized user experiences using machine learning techniques and backend engineering skills.

As a Senior Software Engineer on the Productivity team, you'll enhance developer productivity, optimize CI/CD pipelines, and build internal tooling, all while influencing engineering velocity and code quality with a focus on AI-driven automation and collaboration across engineering teams.

As a Senior Software Engineer, you will build and integrate marketing technology stacks, lead technical projects, collaborate with cross-functional teams, and foster a high-performing engineering culture.