IT - MH - .Net Developer- Intermediate

Net Developer with Mainframe development experience to support and enhance mission-critical enterprise applications in a complex hybrid environment that includes both legacy mainframe systems and modern Microsoft technologies. This individual will work closely with business analysts, project managers, database administrators, and cross-functional development teams to deliver scalable, secure, and maintainable solutions.

Title: .Net Developer with Mainframe developer experience
Duration: 6-12 months with extension possibility.
Location: Candidate will work 100% Onsite in Montgomery AL Main Office (No remote work allowed)
 
Position Summary

• We are seeking a Mid-Level Microsoft .Net Developer with Mainframe development experience to support and enhance mission-critical enterprise applications in a complex hybrid environment that includes both legacy mainframe systems and modern Microsoft technologies.
• This role will be responsible for development, maintenance, modernization, system integrations, reporting solutions, and production support activities.
• The ideal candidate will possess strong mainframe and Microsoft .Net development experience, solid database skills, and the ability to bridge legacy systems with modern application architectures.
• This individual will work closely with business analysts, project managers, database administrators, and cross-functional development teams to deliver scalable, secure, and maintainable solutions.

 
Essential Responsibilities

• Analyze, interpret, and decode legacy Easytrieve enterprise applications running on IBM mainframe platforms.
• Analyze business requirements and translate them into technical specifications and application solutions.
• Design, develop, test, and deploy application enhancements and defect fixes.
• Support batch processing, data transformation, and enterprise integration workflows.
• Develop and maintain reports, extracts, and data distribution processes.
• Create and support ETL solutions using SQL Server Integration Services (SSIS).
• Design, develop, and maintain reporting solutions using SQL Server Reporting Services (SSRS).
• Develop and maintain applications and supporting utilities using .NET technologies.
• Write, optimize, and troubleshoot complex SQL queries, stored procedures, views, and database objects.
• Monitor and resolve production support issues while ensuring system stability and data integrity.
• Participate in application modernization and legacy migration initiatives.
• Collaborate with business users to troubleshoot issues and identify process improvements.
• Create and maintain technical documentation, application specifications, and support procedures.
• Participate in code reviews and ensure compliance with organizational coding standards.
• Support testing efforts including unit, integration, regression, architecture, and user acceptance testing.

 
Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Information Systems, or related field, or equivalent work experience.
• Significant familiarity with the CMS Advise (835) and CMS 837 Health Care Claim file elements and standards.
• 3–7 years of professional software development experience.
• 3+ years of experience in IBM Mainframe development environments.
• Experience supporting large-scale enterprise applications.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent written and verbal communication skills.

 
Required Technical Skills
Mainframe Technologies

• JCL
• CICS
• ROSCOE or TSO
• Easytrieve/EasyPlus
• Batch Processing

 
Microsoft Technologies

• .NET Framework / .NET Core
• C#
• Entity Framework Core
• Database & Reporting
• SQL Server
• T-SQL
• SSRS (SQL Server Reporting Services)
• SSIS (SQL Server Integration Services)
• Stored Procedures
• Database Performance Tuning
• Development Tools
• Visual Studio
• Git
• Azure DevOps Server
• SQL Server Management Studio (SSMS)
• Markdown File for Documentation
• EDI Fabric SDK

 
Preferred Qualifications

• Experience with application modernization and migration of legacy systems.
• Experience using off-the-shelf technologies to manipulate data and report upon CMS data files (835 & 837)
• Experience parsing, generating, and troubleshooting ANSI ASC X12 HIPAA transaction sets, specifically 837 (claims submission) and 835 (Electronic Remittance Advice / ERA)
• Experience working with Alabama Medicaid electronic data specifications, companion guides, and proprietary state formats.
• Experience integrating mainframe applications with distributed platforms and APIs.
• Knowledge of ETL design and data transformation best practices.
• Familiarity with REST and SOAP web services.
• Experience with secure file transfer processes and data integration workflows.
• Experience with enterprise reporting and document generation solutions.
• Knowledge of Agile/Scrum methodologies.
• Experience with Microsoft Azure cloud services.
• Experience in healthcare, financial services, government, insurance, or other highly regulated industries.

 
Core Competencies

• Strong problem-solving and root-cause analysis abilities.
• Ability to work independently with minimal supervision.
• Effective collaboration across technical and business teams.
• Strong organizational and time management skills.
• Ability to manage multiple priorities and deadlines.
• Commitment to quality, accuracy, and continuous improvement.
• Strong customer service mindset and support orientation