Mainframe Developer

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

Job Details

Job ID#: 64443

Job Category: Information Technology

Position Type: Contract

Duration: Long Term

Remaining Positions: 1

Location: Dearborn, MI

Posting Date: 10/14/2026

Stefanini Group is hiring!
Stefanini is looking for a Mainframe Engineer, Dearborn, MI

We are looking for a candidate who will be responsible for designing, developing, testing, and maintaining software applications and products to meet customer needs. Full-stack software engineering roles, including those responsible for developing both user interfaces and server-side components, also fall within this job function. Employees are expected to leverage AI-assisted development tools and techniques to accelerate delivery, improve code quality, and enhance team productivity.

Key Responsibilities

• Engage with customers to deeply understand their use cases, pain points, and requirements, demonstrating empathy and advocating for user-centric software solutions.


• Solve complex problems by designing, developing, and delivering solutions using various tools, programming languages, frameworks, methodologies-including Agile-and technologies, including AI-assisted coding tools such as GitHub Copilot, OpenCode, or similar LLM-based development assistants.


• Assess software application or service requirements and determine the most suitable technology stack, integration method, deployment strategy, and related technical approaches.


• Create high-level software architecture designs that outline the overall structure, components, and interfaces of applications.


• Define and implement software testing strategies, guidelines, policies, and processes in alignment with organizational vision, industry regulations, and market best practices.


• Continuously improve performance, optimize applications, and implement new technologies to maximize development efficiency.


• Apply programming practices such as test-driven development, continuous integration, and continuous delivery.


• Support security practices that safeguard user data, including encryption and anonymization.


• Develop and maintain back-end applications, including APIs and microservices, using server-side programming languages.

Job Requirements

Skills Required

• CA-7, Performance Testing, Job Control Language (JCL), Root Cause Analysis, Software Testing, z/OS, AIPGEE, Batch Processing, SQL, IBM DB2, GitHub, TSO/ISPF, REST APIs, Customer Information Control System (CICS), Application Support, Program Analysis, COBOL, Mainframe Systems, JSON, Application Testing, Agile Software Development, GitHub Copilot, AI-Assisted Development, Prompt Engineering, LLM API Integration, AI Code Review

Skills Preferred

• Process Improvement, Google Cloud Platform, BigQuery, Data Migration, Data Management

Experience Required

• 10+ years of experience in IT, 8+ years of experience in software development

Education Required

• Bachelor's degree

**Listed salary ranges may vary based on experience, qualifications, and local market. Also, some positions may include bonuses or other incentives***

Stefanini takes pride in hiring top talent and developing relationships with our future employees. Our talent acquisition teams will never make an offer of employment without having a phone conversation with you. Those face-to-face conversations will involve a description of the job for which you have applied. We will also speak with you about the process, including interviews and job offers.

About Stefanini Group

The Stefanini Group is a global provider of offshore, onshore and near shore outsourcing, IT digital consulting, systems integration, application, and strategic staffing services to Fortune 1000 enterprises around the world. Our presence is in countries like the Americas, Europe, Africa, and Asia, and more than four hundred clients across a broad spectrum of markets, including financial services, manufacturing, telecommunications, chemical services, technology, public sector, and utilities. Stefanini is a CMM level 5, IT consulting company with a global presence. We are a CMM Level 5 company.

Pay Range

$ 61.00 - $ 66.00