Senior .NET Backend Developer

Job Title: Senior .NET Backend Developer

Location: Plano, TX -Hybrid

Duration: 6 Months Contract

Role Overview:

We are looking for a skilled Senior .NET Backend Developer with strong SQL expertise and experience working on application modernization initiatives. The role requires a solid understanding of existing business logic implemented in complex SQL queries and the ability to rebuild, optimize, and implement that logic within a modern .NET backend architecture.

Key Responsibilities:

Analyze and understand existing business logic embedded in SQL queries, stored procedures, and database objects.

Design and develop backend components using .NET / .NET Core, translating database-driven logic into scalable application-layer services.

Participate in application modernization projects, including migration from legacy systems to modern, service-oriented or API-driven architectures.

Optimize SQL queries for performance, scalability, and maintainability.

Collaborate with business stakeholders, architects, and frontend teams to ensure accurate interpretation of business rules.

Develop and maintain RESTful APIs and backend services to support application functionality.

Ensure high-quality code through unit testing, code reviews, and adherence to best practices.

Support production issues, root cause analysis, and performance tuning as needed.

Required Skills:

10+ years of experience in .NET / C# (.NET Core preferred) for backend development.

Excellent SQL knowledge, including complex queries, joins, CTEs, stored procedures, and performance tuning.

Hands-on experience in application or database modernization projects.

Ability to reverse-engineer business logic from legacy SQL-based implementations.

Experience working with relational databases such as SQL Server (preferred).

Understanding of layered architecture, service-oriented design, and API development.

Familiarity with source control systems (Git, Azure DevOps, etc.).