Top Senior .NET Developer Jobs in Seattle, WA

Hands-on senior engineer responsible for modernizing and operating Azure-hosted .NET backend services. Tasks include migrating legacy code, updating SDK-style projects and NuGet packages, defining IaC, improving CI/CD, expanding E2E tests, diagnosing reliability issues, and participating in Agile ceremonies and design/code reviews.

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.

Design and implement cross-platform features for KeeperChat (desktop, mobile, web). Build and maintain .NET/C# MAUI clients and React web UI, optimize performance and reliability, participate in code reviews, collaborate with product/design/backend teams, and mentor junior engineers while upholding security and code quality.

Architect, design, build, test, and deploy highly available real-time systems. Participate across the SDLC, implement automated testing and CI/CD, maintain documentation, troubleshoot and enhance existing software, and collaborate in an Agile/Scrum team environment.

Senior Software Engineer II designs, develops, tests, and deploys scalable .NET-based features and ERP integrations. Responsibilities include technical design, code reviews, CI/CD pipeline management, troubleshooting, mentoring peers, and ensuring reliability, performance, and security across cloud-native Azure services.

Lead design and implementation of scalable .NET Core + Angular applications. Communicate with stakeholders, estimate work, drive agile delivery, ensure code quality, mentor engineers, and collaborate across product, QA, and design to deliver client-facing solutions.

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.

Develop and maintain web and desktop applications using .NET technologies. Requires strong programming skills, experience with databases, and project management.

Seeking a Senior Software Developer for developing high-performance distributed systems for media workflows, including video transcoding and content delivery.

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

Develop and maintain high-quality software solutions, analyze requirements, and collaborate with project leaders to ensure deadlines are met while adhering to coding standards.

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

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

Design and develop scalable services/APIs using C#/.NET/.NET Core, collaborate during SDLC, mentor junior engineers, and ensure code quality.

The role involves providing technical solutions, guiding teams, ensuring compliance with standards, and leading application design and development in .NET and SQL Server environments.

Develop and implement full-stack applications in .NET and Azure, collaborate with teams, provide technical guidance, and ensure high-quality standards.

The Senior .NET Developer will design, develop, and support REST APIs at scale, working with C# and the .NET Framework while collaborating with cross-functional teams.

The Sr. .Net Developer / Architect will design, develop, and support REST APIs and distributed systems, with a focus on C# and .Net technologies, and work with cloud platforms like Azure or AWS.

Seeking a Sr. .Net Developer experienced in C#, SQL, SDL Web, Tridion, Azure, and enterprise asset management for a 6-month project.

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.

We are looking for a .Net Developer with 5+ years of experience to build software on Microsoft's platforms, requiring great communication skills.