Senior Mainframe Developer: COBOL/JCL for Enterprise Apps

Insight Global (United States); West Des Moines (IA); On-site; USD 62,000 - 76,000; Full time

Benefits offered by this job

Benefits starting day one

401(k) after 90 days

Paid time off

Job summary

Insight Global is seeking a Mainframe Application Developer to design, build, and support core business applications. This role focuses on translating business requirements and use cases into reliable, high‑performing mainframe solutions with long‑term scalability and maintainability, including batch and online processing.

The ideal candidate has 6+ years of mainframe development experience with COBOL and JCL, a strong debugging mindset, and a track record of delivering clean, readable, reusable

Qualifications

• 6+ years of mainframe development experience.
• Strong COBOL and JCL skills.
• Solid understanding of mainframe design and architecture.
• Experience supporting enterprise-scale applications.
• Strong problem-solving and debugging skills.
• Ability to write clean, readable, and well-structured code.

Responsibilities

• Translate business requirements and use cases into functional mainframe applications.
• Work on backlogs and tech debts.
• Ensure application performance, quality, and responsiveness.
• Identify system bottlenecks and defects, and implement effective solutions.
• Apply appropriate design and architectural patterns in a mainframe environment.
• Develop reusable code libraries and utilities.
• Collaborate with cross-functional teams to support ongoing enhancements and maintenance.

Skills

Mainframe development

COBOL

JCL

Debugging

Readable code

Enterprise-scale apps

Job description

Insight Global is seeking a Mainframe Application Developer to design, build, and support core business applications. This role focuses on translating business requirements and use cases into reliable, high‑performing mainframe solutions with long‑term scalability and maintainability, including batch and online processing.

The ideal candidate has 6+ years of mainframe development experience with COBOL and JCL, a strong debugging mindset, and a track record of delivering clean, readable, reusable