Senior .NET / SQL Server Developer

Position Summary

We are seeking a highly skilled Senior .NET / SQL Server Developer to support the development, modernization, and enhancement of enterprise applications within a payroll-focused environment. The ideal candidate will have 7+ years of hands-on software development experience, with strong expertise in C#, modern .NET, and Microsoft SQL Server.

This role will primarily focus on backend application development, database development, and the modernization of business-critical applications. The developer will work closely with technical and business teams throughout the software development lifecycle to deliver scalable, maintainable, and high-performing solutions.

Experience with legacy application modernization, React, Kubernetes, containerized environments, and data integration is highly desirable.

Responsibilities

• Design, develop, test, enhance, and maintain enterprise applications using C# and modern .NET.
• Design and develop scalable backend application components, services, and business logic.
• Develop, optimize, and maintain Microsoft SQL Server databases, complex queries, stored procedures, and database objects.
• Perform SQL query optimization, database performance tuning, and troubleshooting.
• Support the modernization and migration of legacy applications to modern .NET-based architectures.
• Analyze existing application functionality and business logic to support modernization initiatives.
• Participate in all phases of the software development lifecycle, including requirements gathering, design, development, testing, deployment, and production support.
• Troubleshoot complex application and database issues and implement effective long-term solutions.
• Collaborate with business analysts, developers, database teams, and other technical stakeholders to develop scalable and maintainable solutions.
• Support data integration between enterprise applications and systems.
• Write clean, efficient, maintainable, and reusable code while following established development standards and best practices.
• Participate in code reviews and contribute to continuous improvements in application architecture and development practices.
• Support applications deployed within containerized environments, including Kubernetes, where applicable.
• Contribute to frontend development using React as needed.

Required Qualifications

• 7+ years of hands-on software development experience in enterprise application environments.
• Strong hands-on development experience with C# and modern .NET (.NET Core / .NET 8/10).
• Extensive experience with Microsoft SQL Server and T-SQL.
• Strong SQL development skills, including:
• Complex query development
• Stored procedure development
• Query optimization
• Database design
• Performance tuning
• Troubleshooting database performance issues
• Strong experience designing and developing backend applications, services, and business logic.
• Experience supporting and maintaining large-scale, business-critical enterprise applications.
• Experience troubleshooting application and database issues in development and production environments.
• Strong understanding of software development principles, design patterns, and coding best practices.
• Experience working throughout the full software development lifecycle (SDLC).
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent communication and collaboration skills.

Preferred Qualifications

• Experience supporting payroll, human capital management (HCM), financial services, or other complex enterprise business applications.
• Experience with legacy application modernization or system migration initiatives, including migration from mainframe or COBOL-based applications to modern .NET architectures.
• Experience with React or other modern JavaScript frontend frameworks.
• Experience working with Kubernetes and containerized application environments.
• Experience with data integration and enterprise system interfaces.
• Experience developing or consuming REST APIs and web services.
• Experience working within Agile/Scrum development environments.
• Ability to collaborate effectively across technical and business teams.

Key Technical Skills

Core: C#, .NET / .NET Core, Microsoft SQL Server, T-SQL, Stored Procedures, SQL Query Optimization, Database Design, Performance Tuning, Backend Development

Preferred: React, Kubernetes, Containers, REST APIs, Data Integration, Legacy Modernization, COBOL Migration, Agile/Scrum

Ideal Candidate

The ideal candidate is a senior hands-on .NET developer with particularly strong SQL Server expertise who can develop and support complex enterprise applications while contributing to modernization initiatives. Candidates should be equally comfortable working with C# application code and complex SQL/database logic, with additional experience in React, Kubernetes, or legacy modernization considered a strong advantage.