Senior Software Engineer – Platform Modernization (.Net &Azure)

Blueprint Technologies•Redmond, WA

12h•$130,000 - $140,000

About The Position

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.

Requirements

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 testing, debugging, and troubleshooting production systems
Solid foundation in computer science concepts, including data structures, algorithms, and software design
Ability to work independently while collaborating effectively with distributed teams
Strong written and verbal communication skills

Nice To Haves

Experience working with large-scale or legacy enterprise systems undergoing modernization
Experience splitting or migrating workloads to new repositories or isolated environments
Exposure to improving developer experience, testing tooling, or build automation
Experience in Agile/Scrum environments with two-week sprint cycles
Familiarity with secure service-to-service authentication and identity patterns
Experience removing or replacing legacy authentication mechanisms
Background in cloud security, secure engineering initiatives, or compliance-driven development
Experience performing in-depth root cause analysis and long-term reliability improvements
Prior experience working in highly regulated or high-privilege environments

Responsibilities

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