Senior Mainframe Developer, Senior .NET Developer

Fixity Technologies; Plano (TX); On-site; USD 110,000 - 150,000; Full time

Job summary

Fixity Technologies in Plano, TX is seeking a Senior Mainframe Developer with COBOL, DB2, CICS and .NET experience to maintain, enhance and modernize enterprise applications. You will work across mainframe and distributed platforms to enable seamless data flows.

The role emphasizes modernization projects, strong debugging, performance tuning, and collaboration with analysts, architects and cross-functional teams. Applicants should be adept with DevOps practices, CI/CD, and Git.

Qualifications

• Experience in Mainframe modernization programs.
• Knowledge of Micro Focus COBOL or IBM z/OS Connect.
• Understanding of DevOps, CI/CD, and Git.

Responsibilities

• Analyze, design, develop, test, and support Mainframe applications.
• Develop and maintain applications using COBOL, DB2, CICS, JCL, VSAM, and IMS.
• Perform production support, incident resolution, and root cause analysis.
• Create and optimize DB2 queries, stored procedures, and database performance.
• Design and implement interfaces between Mainframe and .NET applications.
• Participate in application modernization and migration initiatives.
• Collaborate with business analysts, architects, and cross-functional teams.
• Conduct code reviews and ensure adherence to development standards.
• Prepare technical specifications, design documents, and operational procedures.
• Support regulatory, compliance, and audit requirements in enterprise environments.

Skills

COBOL

DB2

CICS

JCL

VSAM

IMS

.NET

DevOps

CI/CD

Git

Tools

IBM z/OS Connect

Job description

Senior Mainframe Developer – COBOL, DB2, CICS with .NET Experience

We are seeking a highly skilled Mainframe Developer with strong expertise in COBOL, DB2, CICS, JCL, VSAM, and working knowledge of .NET technologies. The ideal candidate will be responsible for maintaining, enhancing, and modernizing critical enterprise applications while supporting integration between Mainframe and distributed .NET platforms.

Experience in Mainframe modernization programs, Knowledge of Micro Focus COBOL or IBM z/OS Connect.

understanding of DevOps, CI/CD, and Git.

Key Responsibilities

• Analyze, design, develop, test, and support Mainframe applications.
• Develop and maintain applications using COBOL, DB2, CICS, JCL, VSAM, and IMS.
• Perform production support, incident resolution, and root cause analysis.
• Create and optimize DB2 queries, stored procedures, and database performance.
• Design and implement interfaces between Mainframe and .NET applications.
• Participate in application modernization and migration initiatives.
• Collaborate with business analysts, architects, and cross-functional teams.
• Conduct code reviews and ensure adherence to development standards.
• Prepare technical specifications, design documents, and operational procedures.
• Support regulatory, compliance, and audit requirements in enterprise environments.