Senior Mainframe Engineer — AI-Assisted Dev & APIs (Contract)

Stefanini; Dearborn (MI); Hybrid; USD 84,000 - 91,000; Full time

Job summary

Stefanini Group in Dearborn, MI seeks a Senior Mainframe Engineer to design, develop, test, and maintain enterprise software. You will leverage AI-assisted coding tools to accelerate delivery and improve quality across user interfaces and back-end services.

The role emphasizes customer collaboration, architecture planning, and secure, scalable solutions using COBOL, CICS, DB2, JCL, and REST APIs in a full-stack context.

Qualifications

• 10+ years of IT experience with 8+ years in software development.
• Bachelor's degree in a related field required.
• Strong expertise in mainframe tech and modern dev practices.

Responsibilities

• Engage with customers to understand use cases and requirements.
• Design, develop, test, and maintain software applications.
• Create high-level architectures and determine tech stacks.
• Define testing strategies and ensure quality across releases.
• Apply test-driven development, CI, and CD practices.
• Support security practices including encryption and data anonymization.

Skills

Mainframe engineering

JCL

z/OS

COBOL

DB2

REST APIs

CICS

SQL

JSON

GitHub Copilot

AI-assisted development

TSO/ISPF

Agile software development

Education

Bachelor's degree

Tools

GitHub Copilot

OpenCode

LLM-based development tools

Job description

Stefanini Group in Dearborn, MI seeks a Senior Mainframe Engineer to design, develop, test, and maintain enterprise software. You will leverage AI-assisted coding tools to accelerate delivery and improve quality across user interfaces and back-end services.

The role emphasizes customer collaboration, architecture planning, and secure, scalable solutions using COBOL, CICS, DB2, JCL, and REST APIs in a full-stack context.