Mainframe Developer

Stefanini North America and APAC; Detroit (MI); On-site; USD 120,000 - 170,000; Full time

Job summary

Stefanini North America and APAC seeks a senior full‑stack software engineer to design, develop, test, and maintain applications that meet customer needs. You will leverage AI-assisted tools to accelerate delivery and improve code quality while engaging with customers to understand requirements.

The role involves selecting tech stacks, architecting systems, implementing robust tests, and delivering scalable APIs and microservices in an Agile environment.

Qualifications

• Experience delivering full-stack software with user-centric focus.
• Proficiency with Agile methodologies and AI-assisted tooling.
• Strong code review practices and automated quality gates.

Responsibilities

• Engage with customers to understand use cases and requirements.
• Design, develop, test, and maintain software applications.
• Choose technology stacks, integration methods, and deployment strategies.
• Create high-level architecture designs for apps and services.
• Define testing strategies and processes to align with best practices.
• Improve performance and adopt new technologies to boost productivity.
• Apply test-driven development, CI/CD, and delivery practices.
• Support data security with encryption and anonymization.
• Develop and maintain back-end APIs and microservices.

Skills

Client engagement

User-centric design

Agile methodologies

AI-assisted development

Code review

Tools

GitHub Copilot

LLM API

CI/CD

REST APIs

OpenCode

Job description

Only W2 (open for H1B transfer as well), No C2C/1099

Details:

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.

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