Senior .NET Application Architect & Lead Developer

Job Summary

The Franklin County Auditor’s Office is seeking a Senior .NET Application Architect and Lead Developer to provide technical leadership for application migration and modernization initiatives following the implementation of a new tax accounting system.

This role reports directly to the IT Director and is responsible for assessing existing MVC and Entity Framework–based applications
, recommending modern architecture patterns, and leading hands‑on development efforts. The position requires a balance of technical architecture expertise and active coding responsibilities in a fast‑paced, high‑visibility public sector environment.

The ideal candidate will bring strong experience in .NET development, API design, SQL Server optimization, and modern front‑end frameworks
, while mentoring developers and driving best practices across the development lifecycle.

• Review existing ASP.NET MVC applications and identify required migration or modernization opportunities.

• Define and recommend application architecture patterns, technical standards, and development frameworks aligned with organizational needs.

• Assess existing codebases and recommend improvements for maintainability, scalability, and performance.

• Lead modernization efforts for legacy MVC applications
  .

• Lead hands‑on development of .NET applications and services
  .

• Design and implement RESTful APIs and Graph
  
  QL services
  .

• Apply best practices using C#, .NET, and Entity Framework (Code First).

• Develop and enhance front‑end components using React and Prime React
  .

• Design, develop, and optimize SQL Server stored procedures, queries, and indexing strategies
  .

• Ensure efficient database performance and proper data access patterns.

• Break down technical initiatives into milestones, deliverables, and development tasks
  .

• Provide development estimates and support project planning
  .

• Mentor developers through code reviews, troubleshooting, and technical guidance
  .

• Ensure adherence to coding standards, architecture guidelines, and development best practices
  .

• Collaborate with Business Analysts to translate functional requirements into technical designs.

• Work closely with the development team, IT Project Manager, and stakeholders to define project scope and delivery sequencing.

• Communicate technical progress, risks, and recommendations clearly to the IT Director and project leadership
  .

• Support development workflows using Git Hub Enterprise
  .

• Participate in maintaining code quality and continuous improvement practices.

• Perform other related duties as assigned.

• Professional experience in .NET application development
  .

• Deep expertise with C#, .NET, and Entity Framework
  .

• Strong experience designing and developing RESTful APIs and Graph
  
  QL services
  .

• Advanced SQL Server development experience
  , including stored procedures, indexing strategies, and query optimization.

• Demonstrated experience taking ownership of existing applications and codebases
  .

• Proven experience leading development efforts and mentoring other developers
  .

• Experience using Git Hub Enterprise or similar source control platforms
  .

• Strong written and verbal communication skills
  .

• Experience migrating or modernizing legacy ASP.NET MVC applications
  .

• Experience with
  React, Vite, Node.js, and Prime React
  .

• Experience stabilizing or improving applications in active production environments
  .

• Experience working in public sector or high‑visibility government environments
  .

• Experience supporting financial, tax, or property‑related systems
  .

• Technical architecture and system modernization

• Full‑stack .NET development

• API design and integration

• Database performance optimization

• Leadership and developer mentorship

• Strong analytical and problem‑solving skills