Top Senior .NET Developer Jobs in Seattle, WA

The Senior .NET Software Engineer will drive development of .NET software products, focusing on back-end engineering, code reviews, and collaborating with cross-functional teams.

The Senior .Net Developer will enhance SDG's C#/.NET Core codebase, design high-load services, and optimize MS SQL queries, benefiting from a remote work environment and attractive benefits.

Develop and maintain full-stack .NET web applications in the telecom domain. Responsibilities include prototyping, implementation, deployment, integration with QA/production, database development with SQL Server/T-SQL, use of frontend frameworks (jQuery/AngularJS/Node.js), source control, SDLC/ALM practices, and WF/WCF development.

Senior .NET developer to design and build new front- and back-end components using C#, ASP.NET (MVP), SQL Server and web services. Work on healthcare/payer front-office features, producing greenfield code and integrating benefit data into broader systems. Contract role with potential for contract-to-hire.

Senior full-stack developer responsible for end-to-end web development using ASP.NET and AngularJS. Must write strong C# code, solve complex problems, and deliver E2E web solutions.

Lead design and delivery of scalable, reliable software using C#/.NET, SQL Server, React, and Azure. Own complex initiatives from design through operations, mentor engineers, improve CI/CD, observability, and apply DDD/TDD/VSA practices. Use modern APIs, microservices or modular monoliths, and AI-assisted tooling to improve delivery.

Seeking a Senior Full Stack .NET Developer to work on a social good project, with strong skills in C#, AngularJS, design, and UX. Requires 5+ years of experience.

The Staff Engineer will leverage 5+ years of experience in C#, JavaScript, and frameworks to lead and innovate solutions in a collaborative environment.

Responsible for programming and debugging in C# and .NET, developing web services, and working with database systems. Requires strong communication and problem-solving skills.

The .Net Developer will work on front-end heavy projects using ASP.NET, C#, JavaScript, and jQuery, requiring strong communication and independent work skills.

Develop and debug applications using C# and .NET. Design SOAP and RESTful web services, and work with SQL databases. Requires strong communication and problem-solving skills.

The Senior Backend .Net Developer will design and develop large-scale web services and APIs, ensuring high-quality code and utilizing Azure PaaS services, while adhering to Agile practices.

Seeking a Senior Lead/.NET Fullstack Developer to create scalable enterprise applications, focusing on exceptional user experiences and strong problem-solving skills.

Senior .NET full-stack developer responsible for custom application development, API integrations, database optimization, deployments, troubleshooting, performance, security, and production support using .NET/C#, ASP.NET Core, SQL, modern frontend frameworks, cloud, and CI/CD.

Design, develop, test, and deploy .NET solutions (APIs and web apps). Build and consume RESTful services, work with SQL and NoSQL databases, use cloud (Azure/AWS) and Docker, apply unit/integration/performance testing, participate in code reviews, define features via spikes, and architect scalable, high-performance systems. Support occasional after-hours and on-call rotation.

Design, build, and maintain scalable web applications for payroll and accounting. Collaborate with engineers and product partners, write tested code, participate in code reviews, contribute to architecture, improve CI/CD and monitoring, support production (including on-call), and communicate progress while continuously learning.