Senior .NET Architect/Lead - Onsite

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Job Description:

The client is seeking a Senior .NET Application Architect and Lead Developer to provide technical leadership for application migration and modernization efforts following a recent tax accounting system implementation. This role reports directly to the IT Director and is responsible for assessing existing MVC based and Entity Framework applications, defining architecture recommendations, and leading hands on development work. This is a delivery focused role requiring both architectural judgment and direct coding responsibility in a fast paced, high visibility environment.

Essential Duties and Responsibilities

Review existing MVC based applications and identify required migration or modernization work.

Define and recommend application architecture patterns and technical standards appropriate to the current environment.

Break technical work into milestones, deliverables, and development tasks.

Provide development estimates and support project planning activities.

Lead hands on development of .NET applications and APIs (Rest & GraphQL).

Design, develop, and optimize SQL Server stored procedures, indexes, and queries.

Ensure best practices with Entity Framework code first and data access patterns.

Develop and enhance front end utilizing react and prime react components.

Collaborate with business analysts to translate functional requirements into technical designs.

Work closely with the development team, business analysts, and IT Project Manager to define scope and sequencing.

Mentor and support other developers through code reviews and troubleshooting.

Support development workflows using GitHub Enterprise.

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

Perform other related duties as assigned.

Skills/Requirements

Skill Required Years

Professional .NET development experience Required

Demonstrated experience taking ownership of existing applications and codebases Required

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

Strong experience designing and building RESTful APIs and using GraphQL Required

Advanced SQL Server expertise including stored procedures and indexing strategies Required

Proven experience using GitHub Enterprise. Required

Demonstrated experience leading development efforts and mentoring other developers Required

Strong written and verbal communication skills Required

Experience migrating or modernizing legacy MVC applications Highly desired

Experience with React, Vite, and NodeJS Highly desired

Experience stabilizing or improving applications in active production environments Highly desired

Experience working in public sector or highly visible environments Highly desired

Experience supporting financial, tax, or property related systems Highly desired