Senior .NET Application Architect with Financial or Tax System

ClinDCast, LLC; Columbus (OH); Hybrid; USD 140,000 - 180,000; Full time

Job summary

The Franklin County Auditor’s Office is seeking a Senior .NET Application Architect and Lead Developer to provide technical leadership for migration and modernization of a tax accounting system. This hands-on role requires architectural vision and practical delivery in a fast-paced public sector environment.

You will modernize MVC-based applications, design RESTful APIs and GraphQL endpoints, and mentor developers while collaborating with IT leadership, PMs and analysts to align scope and

Qualifications

• 10+ years of professional .NET development experience.
• Strong expertise in C#, .NET, Entity Framework, and MVC.
• Experience modernizing or migrating legacy applications.
• Experience designing RESTful APIs and GraphQL.
• Advanced SQL Server development and performance tuning.
• 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.

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.
• Communicate progress, risks, and recommendations to IT leadership.

Skills

C#

Entity Framework

MVC

REST APIs

GraphQL

SQL Server

Performance Tuning

React

Vite

NodeJS

Leadership

Mentoring

Public Sector

Financial Systems

Job description

Senior .NET Application Architect with Financial or Tax System

Job#: 1978 - Senior .NET Application Architect with Financial or Tax System

Job Description:

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
• 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