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.).