Mainframe Developer

Machine Learning Technologies, LLC; Edison (NJ); On-site; USD 90,000 - 130,000; Full time

Job summary

Machine Learning Technologies, LLC is seeking a mainframe developer to design, develop, and maintain enterprise applications using COBOL and JCL. You will work with DB2, CICS, and VSAM on z/OS in a production environment.

The role involves analyzing legacy systems, performing batch processing, and collaborating with business analysts and QA teams. Ideal candidates have strong problem-solving skills and experience with Endevor or similar source control.

Qualifications

• Proficient in COBOL/COBOL II and JCL for batch processing and job scheduling.
• Experience with DB2, SQL and performance tuning for mainframe databases.
• Strong knowledge of CICS online transactions and screen processing.
• Familiarity with VSAM datasets (KSDS/ESDS/RRDS) and mainframe utilities (SORT, IDCAMS, IEBGENER).

Responsibilities

• Analyze existing legacy applications and implement system enhancements.
• Develop and maintain batch processing, job monitoring, scheduling, and troubleshooting.
• Provide production support for critical mainframe applications and resolve abends.
• Perform code reviews, unit testing, integration testing, and system testing.
• Collaborate with business analysts, QA teams, architects, and cross-functional development teams.

Skills

COBOL

JCL

DB2/SQL

CICS

VSAM

TSO/ISPF

Mainframe utilities

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Design, develop, enhance, and maintain enterprise applications using IBM Mainframe technologies.

Develop and maintain COBOL programs to support complex business requirements.

Create, modify, and execute JCL scripts for batch processing and job scheduling.

Work with DB2 databases, including SQL queries, stored procedures, and database performance tuning.

Develop and maintain CICS online transactions and screen processing.

Work with VSAM datasets, including KSDS, ESDS, and RRDS.

Analyze existing legacy applications and implement system enhancements.

Perform batch processing, job monitoring, scheduling, and troubleshooting.

Develop and maintain production support solutions for critical mainframe applications.

Identify and resolve application defects, abends, and performance issues.

Perform code reviews, unit testing, integration testing, and system testing.

Work on mainframe application modernization and legacy system migration initiatives.

Collaborate with business analysts, QA teams, architects, and cross-functional development teams.

Optimize COBOL programs and DB2 queries for improved application performance.

Manage source code using Endevor, Changeman, or Git.

Support application deployments, release management, and production implementation.

Prepare technical documentation and participate in Agile development activities.

Required Technical Skills

COBOL / COBOL II

JCL (Job Control Language)

DB2 and SQL

CICS

VSAM

TSO / ISPF

Mainframe Utilities (SORT, IDCAMS, IEBGENER)

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.