Top .NET Developer Jobs in Seattle, WA

Develop and maintain a mission-critical .NET financial web application. Responsibilities include full-stack development with C#, ASP.NET, JavaScript, and jQuery; SOAP/XML integrations; Oracle SQL and PL/SQL database work; secure coding; unit testing; production troubleshooting; Agile delivery; documentation; and collaboration with product, business, and testing teams.

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.

Configure and support the FASTDS-VS COTS application, including requirements analysis, user permissions, reference tables, change-request development, scripting, debugging, source control, testing, implementation specifications, and production support. The role requires SQL and object-oriented development experience, familiarity with software development methodologies, and strong analytical and communication skills.

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.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

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.

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.

Owns the design, development, testing, deployment, and maintenance of production software. Builds C#/.NET backend services, Angular web applications, and .NET MAUI mobile apps; optimizes SQL Server databases; resolves production issues; improves reliability, security, performance, and observability; writes tests and documentation; participates in code reviews; and translates ambiguous business needs into maintainable technical solutions.

Leads hands-on full-stack development across architecture, implementation, testing, deployment, and support. Designs secure, scalable C#/.NET and Angular applications, cloud integrations, APIs, and data solutions on AWS. Guides developers, establishes engineering standards, manages CI/CD and automated testing, troubleshoots complex issues, and drives cloud optimization, security, and technical debt reduction. Collaborates with product, architecture, DevOps, analytics, and project teams while supporting migration of on-premises applications to AWS.

Lead a development team while remaining hands-on in full-stack engineering. Design, build, test, deploy, and support secure web applications using C#/.NET, Angular, databases, and AWS. Drive cloud migrations, architecture, CI/CD automation, application security, troubleshooting, performance and cost optimization. Mentor developers, establish engineering standards, lead technical delivery, and collaborate with product, data, DevOps, and architecture teams.

Build scalable backend-heavy services and applications using C# and .NET, while contributing to Angular and TypeScript UI development. Design and develop REST APIs and microservices, work with relational databases, implement automated testing and CI/CD, and ensure system security, scalability, and performance. Preferred work includes event-driven architectures, messaging systems, NoSQL databases, caching, search technologies, and mentoring engineers or leading technical initiatives.

Leads end-to-end modernization from a monolith to microservices, including legacy analysis, architecture, estimation, data migration, deployment, and production support. Guides .NET services, databases, messaging, containerization, and frontend integrations. Acts as the technical escalation point for complex issues while improving Jira tracking, estimation accuracy, QA collaboration, release predictability, and engineering processes. Manages and develops the team through one-on-ones, performance reviews, feedback, and career-focused objectives.

Lead end-to-end development of secure, scalable web applications and data solutions supporting clinical trial operations. Design frontend and backend components using C#/.NET, Angular, AWS, and relational or non-relational databases. Guide architecture, testing, deployment, CI/CD, security, cloud optimization, and regulatory compliance. Mentor developers, oversee technical delivery, troubleshoot complex issues, and lead migration and modernization of on-premises applications to AWS.

Develop, design, modify, test and implement ASP.NET applications using MVVM, UWP and WPF. Collaborate in Agile Scrum, provide estimates, participate in code reviews, and resolve production issues.

Develop web applications using AngularJS, ASP.NET, C#, and documentation. Collaborate with teams to solve problems and ensure high quality.

The role involves developing applications using .Net technologies and managing testing for web services and applications.

The role involves enhancing, developing, and maintaining .NET applications for over 6 years. Communication skills are essential.

Develop and maintain applications using .Net C# and SQL, with a focus on Azure deployments, while communicating effectively and multitasking under pressure.

The .Net Developer will develop applications using .Net C#, SQL, and Azure, requiring strong communication skills and the ability to work independently.

Seeking a Jr. .Net Developer with hands-on C# experience and SQL Server knowledge. Familiarity with Azure, ASP.NET, and web services is preferred.

Looking for a Junior .Net Developer with at least 2 years of experience in C#. This is a full-time position.

Develop and maintain applications using C#, ASP.NET, and MVC. Collaborate with the team and improve communication skills.

This role requires a Dot Net Developer with over 5 years of experience in software development, particularly with C#, ASP.NET, MVC, and SQL. Knowledge in Azure is advantageous.

Seeking a .NET Developer with 5+ years of experience in C# and SQL to design and maintain applications using Microsoft technologies, focusing on Azure and system development methodologies.

Seeking a .NET Developer proficient in C# .NET, SQL, Power BI, and Windows PowerShell with good communication skills.