Programmer Advanced (Application Developer II) - PA 26-02758

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Position: Programmer Advanced (Application Developer II)

Location: Columbia, South Carolina

Duration: 12 Months

Employment Type: Contract

Note: The Candidate applying for this role must be SC resident and be eligible for getting Security Clearance.

Overview

Seeking a highly skilled Application Developer to support the modernization of a legacy Case Management System (CMS) into a scalable and maintainable .NET (C#) architecture. This role focuses on migrating business logic, data layers, and interfaces from a legacy model-driven environment into a modern, service-oriented architecture with RESTful APIs.

Key Responsibilities

<>1. Legacy System Analysis & Reverse Engineering

• Analyze legacy system models, generated code, and database structures
• Identify and document business rules, data flows, and system dependencies
• Translate legacy logic into maintainable .NET-based solutions
  
  

<>2. Application Modernization

• Design and develop .NET (C#) applications to replace legacy components
• Refactor systems into layered architecture (API, Services, Data Access)
• Apply modular and domain-driven design patterns
• Ensure compatibility during phased system migration
  
  

<>3. API Development & Integration

• Develop RESTful APIs for internal and external integrations
• Enable secure system integrations across enterprise platforms
• Implement authentication and authorization (JWT, OAuth2, RBAC)
• Manage API versioning, monitoring, and governance
  
  

<>4. Data Layer Transformation

• Modernize data access using Entity Framework and/or Dapper
• Work with SQL Server environments and multi-database systems
• Support data warehouse and reporting integrations
• Ensure data integrity, performance optimization, and auditability
  
  

<>5. Development & DevOps Practices

• Utilize Git-based version control and CI/CD pipelines
• Implement development standards, documentation, and testing strategies
• Support unit and integration testing
  
  

<>6. Incremental Migration Strategy

• Support phased modernization using strategies like Strangler Pattern
• Enable parallel system operations during migration
• Collaborate on prioritization of system modules
  
  

<>7. Stakeholder Collaboration

• Work with cross-functional teams to translate business requirements into technical solutions
• Collaborate with internal teams and external partners for system integration
  
  

Required Qualifications

• Bachelor s degree in Computer Science, Information Systems, or related field (or equivalent experience)
• 3 years of application development experience
• 3 years of SQL Server / T-SQL experience
• 3 years working with legacy or enterprise systems
• Strong debugging and troubleshooting skills
  
  

Preferred Qualifications

• Experience with legacy 4GL or model-driven environments (e.g., CA Plex)
• Experience with generated languages (C , Java, or .NET)
• Knowledge of API integrations and data warehousing
• Experience with batch processing and transactional systems
• Familiarity with case lifecycle management and reporting metrics