Senior .NET Application Architect with Financial or Tax System

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 a recent tax accounting system implementation. Reporting directly to the IT Director, this role is hands-on and delivery-focused, requiring both architectural leadership and active development in a fast-paced, high-visibility public-sector environment.

Key Responsibilities

• Assess and modernize existing MVC-based .NET applications

• Define application architecture standards and modernization strategies

• Lead hands-on development of .NET applications and REST/GraphQL APIs

• Design and optimize SQL Server stored procedures, queries, and indexes

• Break technical work into milestones, estimates, and development tasks

• Collaborate with project managers and business analysts on scope and sequencing

• Mentor developers through code reviews and technical guidance

• Support development workflows using GitHub Enterprise

• Communicate progress, risks, and recommendations to IT leadership

Required Skills & Experience

• 10+ years of professional .NET development experience

• Strong expertise in C#, .NET, Entity Framework, and MVC

• Proven experience modernizing or migrating legacy applications

• Experience designing RESTful APIs and working with GraphQL

• Advanced SQL Server development and performance tuning skills

• Experience with React, Vite, and NodeJS

• Strong leadership and mentoring experience

• Experience supporting financial, tax, or property-related systems

• Public sector or highly visible environment experience preferred