Senior Software Engineer – Platform Modernization (.Net &Azure Redmond, WA

Who is Blueprint?

We are a technology solutions firm headquartered in Bellevue, Washington, with a strong presence across the United States. Unified by a shared passion for solving complicated problems, our people are our greatest asset. We use technology as a tool to bridge the gap between strategy and execution, powered by the knowledge, skills, and the expertise of our teams, who all have unique perspectives and years of experience across multiple industries.

We’re bold, smart, agile, and fun.

Blueprint helps organizations unlock value from existing assets by leveraging cutting‑edge technology to create additional revenue streams and new lines of business. We connect strategy, business solutions, products, and services to transform and grow companies.

At Blueprint, we believe in the power of possibility and are passionate about bringing it to life. Whether you join our bustling product division, our multifaceted services team or you want to grow your career in human resources, your ability to make an impact is amplified when you join one of our teams. You’ll focus on solving unique business problems while gaining hands‑on experience with the world’s best technology.

We believe in unique perspectives and build teams of people with diverse skillsets and backgrounds. At Blueprint, you’ll have the opportunity to work with multiple clients and teams, such as data science and product development, all while learning, growing, and developing new solutions. We guarantee you won’t find a better place to work and thrive than at Blueprint.

As a Software Engineer, you will design, build, and maintain services that support large‑scale driver‑servicing systems for global Windows users. Operating within an Agile/Scrum environment, you’ll work across modern and legacy codebases, develop cloud‑hosted services, and contribute to infrastructure modernization efforts. This role requires deep expertise in C#/.NET, Azure cloud services, and Dev Ops foundations, with a strong focus on service reliability, developer productivity, and continuous improvement of production systems.

• Design, develop, implement, test, and maintain business and application software.
• Fine‑tune and enhance complex software implementation projects.
• Gather and analyze system requirements, document specifications, and deliver tailored software solutions.
• Review enhancement requests and translate them into actionable technical updates.
• Implement system software and customize solutions to meet client and platform needs.
• Prepare detailed technical specifications, documentation, and test plans.
• Develop new programs aligned to specifications and generate test data for validation.
• Modernize and refactor existing programs to meet new standards and improve service health.
• Conduct unit testing and troubleshoot issues across both new and legacy systems.
• Build migration packages for system testing, user acceptance, and production deployment.
• Perform quality assurance reviews to ensure reliability and compliance.
• Validate post‑implementation performance and resolve production bugs.

• Strong hands‑on experience with C# across both .NET Framework and modern .NET (.NET Core / .NET 6+).
• Experience building production systems and handling large/legacy codebases.
• Proven ability to perform refactoring, modernization, and code quality improvements.
• Experience migrating to SDK‑style projects, updating NuGet packages, and upgrading .NET runtimes.
• Ability to write maintainable, testable, service‑oriented code and troubleshoot complex issues.

• Strong hands‑on experience with C# across both .NET Framework and modern .NET (.NET Core / .NET 6+).
• Experience building production systems and handling large/legacy codebases.
• Proven ability to perform refactoring, modernization, and code quality improvements.
• Experience migrating to SDK‑style projects, updating NuGet packages, and upgrading .NET runtimes.
• Ability to write maintainable, testable, service‑oriented code and troubleshoot complex issues.

• Experience…