Senior Mainframe Developer

ensono; United States; Remote; USD 90,000 - 150,000; Full time

Job summary

Ensono is seeking a senior mainframe specialist to design, develop, and maintain enterprise mainframe applications in a managed services environment. The role blends hands-on coding with production support, operating within both waterfall and agile teams to keep mission-critical systems stable while driving modernization and performance improvements.

You will work with COBOL, JCL, CICS, DB2, IMS DC/DB, MQ, VSAM, and Netron Frame; handle incidents and change requests; perform troubleshooting;

Qualifications

• Bachelor's or Master's in Computer Science, Information Technology, or related field.
• Extensive mainframe development, support, and maintenance experience.
• Proficiency in COBOL, JCL, CICS, DB2, IMS DC/DB, MQ, VSAM, and Netron Frame.
• Strong SDLC, version control, and software development tools knowledge.

Responsibilities

• Design, develop, and maintain mainframe applications using COBOL, CICS, IMS DB/DC, DB2, MQ, VSAM, and Netron Frame technology.
• Handle incidents, service requests, and change requests via enterprise ticketing systems such as ServiceNow or Service Manager.
• Perform complex technical troubleshooting and resolution for application and integration issues.
• Conduct performance tuning and optimization of mainframe applications and database queries.
• Produce technical documentation including knowledge base articles and SOPs for business and support teams.
• Translate functional and technical requirements into implementation and change options aligned with business needs.

Skills

Mainframe dev

Analytical thinking

Communication

Teamwork

Education

Bachelor's degree in CS/IT

Tools

COBOL

JCL

CICS

DB2

IMS DC/DB

MQ

VSAM

Netron Frame

Job description

Role overview

This senior position focuses on designing, developing, and maintaining enterprise mainframe applications within a managed services environment. The work combines hands-on coding with production support, delivered across both waterfall and agile methodologies. The role centers on keeping mission-critical systems stable while continuously modernizing and optimizing performance.

Responsibilities

• - Design, develop, and maintain mainframe applications using COBOL, CICS, IMS DB/DC, DB2, MQ, VSAM, and Netron Frame technology


• - Handle incidents, service requests, and change requests simultaneously using enterprise ticketing systems such as ServiceNow or Service Manager


• - Perform complex technical troubleshooting and resolution for application and integration issues


• - Conduct performance tuning and optimization of mainframe applications and database queries


• - Produce technical documentation including knowledge base articles and standard operating procedures for business and support teams


• - Translate functional and technical requirements into implementation and change options aligned with business needs

Requirements

• - Bachelor's or Master's degree in Computer Science, Information Technology, or a related field


• - Extensive experience in mainframe application development, support, and maintenance


• - Proficiency in COBOL, JCL, CICS, DB2, IMS DC/DB, MQ, VSAM, and Netron Frame technology


• - Strong understanding of SDLC methodologies, version control systems, and software development tools


• - Excellent problem-solving, analytical, and communication skills; able to work independently or as part of a team

Nice to have

• - Prior experience operating across both agile and waterfall delivery models