Senior Software Engineer – Platform Modernization (.Net &Azure

Redmond, WA

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 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—while learning, growing, and developing new solutions. We guarantee you won’t find a better place to work and thrive than at Blueprint.

In this role, you will be responsible for modernizing, enhancing, and maintaining enterprise‑grade software systems with a strong focus on business logic, reliability, and long‑term maintainability. You will work on upgrading legacy services, improving build and deployment pipelines, and implementing secure, scalable solutions in a cloud environment. The role requires hands‑on development, close collaboration with cross‑functional teams, and ownership of scoped technical initiatives from design through post‑production support.

• Design, develop, test, and maintain business and application software, including client/server and distributed systems
• Modernize existing services, codebases, and infrastructure to align with current engineering standards
• Migrate legacy project definitions to modern SDK‑style projects and updated frameworks
• Upgrade and manage NuGet packages, resolve compiler warnings, and improve overall code hygiene
• Refactor and modernize authentication and authorization mechanisms using secure, cloud‑aligned patterns
• Build and maintain RESTful APIs and backend services
• Participate in build pipeline modernization and CI/CD improvements
• Define and manage cloud infrastructure using Infrastructure as Code (IaC)
• Analyze system requirements and translate them into technical designs and implementation plans
• Review enhancement requests and provide technical recommendations
• Create detailed software specifications, test plans, and supporting documentation
• Develop and execute unit, integration, and end‑to‑end tests
• Support system migrations, testing cycles, and production deployments
• Perform post‑implementation validation and resolve defects or reliability issues
• Conduct quality assurance reviews and participate in code reviews
• Collaborate within Agile/Scrum teams, contributing to sprint planning, stand‑ups, reviews, and retrospectives

• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field
• 8–10 years of professional software engineering experience
• Strong hands‑on experience with C# across .NET Framework and modern .NET
• Proven experience modernizing legacy applications and services
• Experience building and maintaining cloud‑based applications and backend services
• Strong understanding of RESTful API design and implementation
• Experience with Infrastructure as Code (ARM, Bicep, Terraform, or similar)
• Hands‑on experience with CI/CD pipelines and build system modernization
• Strong focus on code quality, maintainability, and engineering best practices
• Experience with automated…