Top .NET Developer Jobs in Seattle, WA

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Senior .NET Web App Developer responsible for designing and building .NET web applications, implementing Oracle PL/SQL solutions, using Entity Framework and Blazor, applying design principles, producing technical documentation, performing performance tuning, and collaborating in Scrum/Agile teams with Bitbucket, JIRA, Tempo, and Confluence.

Develop and maintain web-based applications using .NET/C#, JavaScript, HTML/CSS, SQL and Oracle/SQL Server. Perform root cause analysis, collaborate with teams for requirements, follow Agile SDLC, present change demonstrations, and use Azure DevOps/Jira for lifecycle management. Implement and maintain Blazor components.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

Lead customer-facing architecture and development of scalable, cloud-native AWS applications. Drive design discussions, migrate monoliths to microservices, implement serverless and container solutions, advise on AWS best practices, and influence developer-focused product and platform strategy.

Lead technical engagements to architect and build scalable, cloud-native AWS applications using serverless, containers, and microservices. Migrate monoliths to microservices, advise on AWS best practices, influence infrastructure and product strategy, and work directly with customers and cross-functional teams.

The Integration Developer supports and maintains Rhapsody and .NET applications, automates workflows, and modernizes legacy systems for public health data exchange.

Hands-on technical lead responsible for migrating a legacy VB.NET Web Forms system to ASP.NET Core, owning architecture, releases, security hardening, CI/CD, and mentoring an engineering team. Drive phased migration, coordinate cross-team dependencies, improve DevOps pipelines, enforce secure SDLC, and actively contribute to development and code reviews.

As a Senior Software Engineer, you will design and develop scalable systems, enhance underwriting applications, and leverage AI to improve operational efficiency.

We are looking for a motivated .NET Developer to build scalable applications, collaborating with teams to design, develop, and maintain software.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

The Senior .NET Developer will work on developing and maintaining applications, mentor junior developers, and ensure compliance with regulations. The role requires expertise in full-stack development, particularly with SQL Server databases and Azure.

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.

As an Online Game Services Engineer, you will develop backends for multiplayer games, support live features, and improve player experience through feature iteration and optimization.

Lead backend development on the scheduling platform modernization, contribute across products, write APIs, and drive AI-accelerated software development workflows.

Lead backend development on the scheduling platform modernization. Contribute across Python and .NET ecosystems, write APIs, review code, and support AI-accelerated development workflows while collaborating in a remote team environment.

The Staff Software Engineer will design .NET infrastructure, automate builds, maintain tooling for .NET libraries, and mentor peers while ensuring security and reliability.

As a Senior Software Engineer at PerfectServe, you'll design, build, and maintain high-quality code for healthcare communication systems, mentoring junior engineers and collaborating across teams to improve patient care and clinical workflows.

The Full Stack .NET Developer will enhance Coretek's Insights product by developing features, improving user experience, and collaborating with stakeholders while applying Agile methodologies and CI/CD practices.

Develop and maintain scalable software solutions, mentor developers, and integrate AI tools. Collaborate on technical solutions aligned with business goals.

The Senior .NET Software Engineer will develop and manage work-management software using a wide technology stack while collaborating with a remote engineering team.

As a Principal .NET Software Engineer at Versapay, you will modernize payments infrastructure, improve scalability, design distributed services, and take ownership of payment workflows while collaborating with various teams to enhance customer experience.

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.

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.