Mainframe Engineer

Charter Global; Dallas (TX); Hybrid; USD 120,000 - 170,000; Full time

Job summary

Charter Global is seeking a Senior Full Stack Mainframe Engineer to support CAM applications by developing, maintaining, and modernizing enterprise mainframe solutions. You will work alongside distributed teams to ensure platform stability and cloud-native integration.

The ideal candidate has deep mainframe expertise, hands-on experience with COBOL, JCL, CICS, DB2, VSAM, and Syncsort, and participates in modernization, API integration, and AWS-related efforts.

Qualifications

• 8+ years of enterprise Mainframe development experience.
• Strong COBOL, JCL, CICS, DB2 (Native SQL and COBOL Stored Procedures), VSAM, and Syncsort skills.
• Experience supporting high-volume, mission-critical production systems.
• Experience working in Agile development environments.

Responsibilities

• Design, develop, maintain, and enhance enterprise mainframe applications supporting critical business functions.
• Develop and support applications using COBOL, JCL, CICS, DB2, VSAM, and Syncsort.
• Analyze and resolve complex production issues, perform root cause analysis, and implement long-term solutions.
• Support both batch and online transaction processing while ensuring high availability and operational stability.
• Collaborate with distributed engineering teams developing Java, Spring Boot, REST APIs, and AWS-based applications.
• Participate in application modernization initiatives, API integration, and cloud transformation efforts.
• Perform code reviews, testing, deployment support, and production readiness activities.
• Create and maintain technical documentation, operational runbooks, and knowledge transfer materials to reduce key-person dependency.
• Partner with engineering teams to continuously improve application performance, reliability, monitoring, and operational excellence.

Skills

Mainframe development

COBOL

JCL

CICS

DB2

VSAM

Agile

Cloud integration

Troubleshooting

Tools

Java

Spring Boot

REST APIs

AWS

Insomnia

Postman

Job description

Location: Remote(Dallas, TX; San Antonio, TX; Raleigh, NC; or Jersey City, NJ)

Onboarding: Will require Client background check & fingerprint in addition to standard background check listed in our MSA. Generally expect a 3-4 week onboarding window at a minimum.

Note:(Only first week is onsite at your nearer location)

The Senior Full Stack Mainframe Engineer will support critical Customer & Account Management (CAM) applications by developing, maintaining, and modernizing enterprise mainframe solutions. This role partners closely with distributed engineering teams to ensure platform stability, production reliability, and successful integration between legacy mainframe systems and modern cloud-native applications. The ideal candidate is a hands-on engineer with deep mainframe expertise who is comfortable working across both legacy and distributed technologies while supporting ongoing modernization initiatives

Responsibilities:

• Design, develop, maintain, and enhance enterprise mainframe applications supporting critical business functions
• Develop and support applications using COBOL, JCL, CICS, DB2, VSAM, and Syncsort
• Analyze and resolve complex production issues, perform root cause analysis, and implement long-term solutions
• Support both batch and online transaction processing while ensuring high availability and operational stability
• Collaborate with distributed engineering teams developing Java, Spring Boot, REST APIs, and AWS-based applications
• Participate in application modernization initiatives, API integration, and cloud transformation efforts
• Perform code reviews, testing, deployment support, and production readiness activities
• Create and maintain technical documentation, operational runbooks, and knowledge transfer materials to reduce key-person dependency
• Partner with engineering teams to continuously improve application performance, reliability, monitoring, and operational excellence

Required Qualifications:

• 8+ years of enterprise Mainframe development experience
• Strong expertise in COBOL, JCL, CICS, DB2 (Native SQL and COBOL Stored Procedures), VSAM, and Syncsort
• Experience supporting high-volume, mission-critical production systems
• Strong troubleshooting, analytical, and problem-solving skills
• Experience working in Agile development environments

Preferred Qualifications:

• Working knowledge of Java, Spring Boot, REST APIs, XML, JSON, and AWS
• Experience with API testing tools such as Insomnia or Postman
• Experience integrating mainframe applications with distributed systems
• Familiarity with CI/CD and DevOps practices
• Experience supporting application modernization and cloud migration initiatives

Excellent communication, collaboration, and documentation skills