Mainframe Developer

job summary:

Working knowledge of Java, Spring Boot, 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.

location: Westlake, Texas

job type: Contract

salary: $63 - 64 per hour

work hours: 8am to 5pm

education: Bachelors



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 perfection.

qualifications:

8+ years of enterprise Mainframe development experience.

Strong expertise in:

COBOL

JCL

CICS

DB2 (Native SQL and COBOL Stored Procedures)

VSAM

Syncsort

Experience designing and integrating REST APIs using XML and JSON.

Experience supporting high-volume, mission-critical production systems.

Strong troubleshooting, analytical, and problem-solving skills.

Experience working in Agile development environments.

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact

Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.