Senior .NET Developer / Architect

Company: Grange Insurance Association
Location: Seattle
Posted on: January 1, 2026

Job Description:

For over 130 years, our Company has proudly provided trusted insurance solutions to individuals and families. With a legacy built on stability and service, we are now focused on shaping the future of our technology platforms. Our systems are rooted in the Microsoft stack. We are embarking on a journey to modernize these platforms by adopting modern architecture, cloud capabilities, and scalable development practices to lay the foundation for future innovation. The successful candidate must be located in and able to commute to our Seattle office for required hybrid work. Current residence in the Greater Seattle area is a prerequisite for application. Position Overview We are seeking an experienced and forward-thinking Senior .NET Developer / Architect to lead this transformation. This is a hands-on role for a proven technical leader who can balance active development with high-level architectural direction. You will play a pivotal role in defining the Company’s Applications modernization strategy, guiding the migration to .NET Core and C#, and establishing scalable, secure, and resilient platforms for the future. Key Responsibilities Lead the modernization of legacy systems by migrating applications to .NET Core and C#. Architect and develop next-generation web and application platforms that support business growth and long-term maintainability. Design and implement RESTful APIs, establishing standards and practices that support modular and scalable architectures. Provide technical leadership and mentorship to development staff, ensuring high-quality code and best practices are consistently applied. Collaborate with IT and business stakeholders to align technical roadmaps with organizational objectives. Evaluate and recommend emerging tools, frameworks, and design approaches to support scalability, performance, and resilience. Ensure that all solutions meet security, compliance, and performance standards. Qualifications The successful candidate must be located in and able to commute to our Seattle office for required hybrid work. Current residence in the Greater Seattle area is a prerequisite for application. 7 years of hands-on experience with C# and .NET Core/.NET Framework. Demonstrated success migrating legacy applications to modern Microsoft platforms. Proficiency with SQL Server and the Microsoft technology ecosystem. 5 years of strong experience in designing and delivering RESTful APIs. Knowledge of modern architectural patterns such as layered architectures and microservices. Hands-on experience with version control systems (Git), CI/CD pipelines, and automated testing practices. Ability to balance technical leadership with hands-on coding responsibilities. Strong analytical, problem-solving, and communication skills. Preferred Skills Experience with cloud platforms (Azure preferred) and cloud-native architectures. Familiarity with containerization technologies such as Docker and Kubernetes. Understanding of DevOps methodologies and modern deployment pipelines. Experience with using AI tools to assist with development, code generation, debugging, and documentation tasks. Why Join Us This is a unique opportunity to directly shape the future of a long-standing, stable organization while working with modern technologies. You will play a key role in defining the technical vision, lead critical modernization efforts, and leave a lasting impact on the Company’s technology strategy for decades to come. Comprehensive Benefits: Pay Range: $89,805 to $172,401 Flexible hybrid work schedule (2 days per week in Seattle office required) Medical, Dental, and Vision plans 401(k) plan with up to 5% match Employer sponsored LTD, life insurance, and AD&D Discretionary profit sharing and bonuses Fully subsidized ORCA card and/or free parking for Seattle employees Education Reimbursement On-Site Fitness Center Opportunities for career growth and advancement within the organization. A supportive and collaborative work environment. Ongoing training and professional development opportunities. How to Apply: Grange Insurance Association is an equal opportunity employer and welcomes all qualified candidates to apply. Grange Insurance Association is committed to ensuring a diverse and inclusive workplace where all employees are treated with respect and dignity. We encourage applications from candidates of all backgrounds and experiences. Compensation details: 89806-172401 Yearly Salary PIb769de47924f-37456-39227666

Keywords: Grange Insurance Association, Sammamish , Senior .NET Developer / Architect, IT / Software / Systems , Seattle, Washington