Lead Mainframe Engineer

Quantum Technologies. LLC; Denver (CO); On-site; USD 140,000 - 190,000; Full time

Job summary

Quantum Technologies. LLC is seeking a Lead Software Engineer to join the Safe Deposit Box Modernization team, focusing on a mainframe system of record.

You will evaluate, plan, and support modernization efforts, including AI-assisted discovery, code and dependency analysis, solution design, and testing. The role involves applying human review and controls to AI outputs, preserving business logic, improving delivery, and reducing risk.

Qualifications

• 5+ years of software engineering experience with IBM z/OS mainframe applications, including application development, maintenance, production support, and troubleshooting
• 5+ years of hands-on COBOL experience, including structured and modular programming, copybooks, file processing, debugging, unit testing, and analysis of existing business logic
• 5+ years of hands-on experience developing, maintaining, and troubleshooting JCL, cataloged and in-stream PROCs, job steps, parameters, utilities, restart and recovery procedures, batch schedules, dependencies, and job abends
• 3+ years of hands-on experience with VSAM datasets, including ESDS, KSDS, or RRDS structures; file definitions; IDCAMS utilities; data access; and production issue resolution
• 3+ years of experience with CICS and one or more mainframe data technologies such as Db2 or IMS, including transaction flows, program interfaces, data access, and performance or failure analysis
• 3+ years of experience integrating mainframe applications with enterprise platforms using technologies such as IBM MQ, Kafka, APIs, or managed file‑transfer patterns
• Experience using source‑control, build, debugging, testing, scheduling, monitoring, and deployment tools within a mainframe development environment
• Experience working across the full software development lifecycle in Agile delivery environments, including requirements analysis, solution design, coding, testing, implementation, production validation, incident management, and technical documentation
• Familiarity with approved AI‑assisted engineering tools for mainframe application discovery, COBOL and JCL analysis, dependency mapping, documentation, code development, test creation, business‑rule extraction, and migration or modernization planning, with appropriate human validation and adherence to security, data‑protection, and risk‑management requirements

Responsibilities

• Analyze, design, and develop strategic technical solutions and interface with enterprise systems of record, architecture, frontend channels, and middleware servicing applications
• Support mainframe modernization efforts and AI-assisted discovery, code and dependency analysis, solution design, modernization planning, code development, and test creation
• Resolve issues, test coded solutions, locate or create test data for end-to-end testing with partners, perform production research to resolve reported issues, and validate implemented solutions in production
• Collaborate across enterprise systems, architecture, and middleware teams to ensure alignment with business goals and project milestones

Skills

COBOL programming

Mainframe development

JCL

CICS

VSAM

IBM MQ/Kafka integration

Agile delivery

AI-assisted engineering tools

Tools

IDCAMS

VSAM (ESDS/KSDS/RRDS)

Db2

IMS

IBM MQ

Kafka

Job description

Client is seeking a Lead Software Engineer to join the Safe Deposit Box Modernization team supporting the Safe Deposit Box Mainframe System of Record Application.

This role will be critical in helping to evaluate, plan, and support our mainframe modernization, including responsibly using approved artificial intelligence (AI) tools to accelerate application discovery, code and dependency analysis, technical documentation, solution design, modernization planning, code development, and test creation.

The engineer will apply appropriate human review, validation, security, data protection, and risk controls to AI-assisted outputs to help preserve business logic, improve delivery efficiency, and reduce implementation risk.

This role will analyze, design, and develop strategic technical solutions and interface with enterprise systems of record, architecture, frontend channels, and middleware servicing applications.

This role also supports resolving issues, testing coded solutions, locating, or creating test data for end-to-end testing with partners, performing production research to resolve reported issues or assist other team members, and validating implemented solutions in production to confirm successful outcomes.

Required Qualifications

• 5+ years of software engineering experience with IBM z/OS mainframe applications, including application development, maintenance, production support, and troubleshooting
• 5+ years of hands‑on COBOL experience, including structured and modular programming, copybooks, file processing, debugging, unit testing, and analysis of existing business logic
• 5+ years of hands‑on experience developing, maintaining, and troubleshooting JCL, cataloged and in-stream PROCs, job steps, parameters, utilities, restart and recovery procedures, batch schedules, dependencies, and job abends
• 3+ years of hands‑on experience with VSAM datasets, including ESDS, KSDS, or RRDS structures; file definitions; IDCAMS utilities; data access; and production issue resolution
• 3+ years of experience with CICS and one or more mainframe data technologies such as Db2 or IMS, including transaction flows, program interfaces, data access, and performance or failure analysis
• 3+ years of experience integrating mainframe applications with enterprise platforms using technologies such as IBM MQ, Kafka, APIs, or managed file‑transfer patterns
• Experience using source‑control, build, debugging, testing, scheduling, monitoring, and deployment tools within a mainframe development environment
• Experience working across the full software development lifecycle in Agile delivery environments, including requirements analysis, solution design, coding, testing, implementation, production validation, incident management, and technical documentation
• Familiarity with approved AI‑assisted engineering tools for mainframe application discovery, COBOL and JCL analysis, dependency mapping, documentation, code development, test creation, business‑rule extraction, and migration or modernization planning, with appropriate human validation and adherence to security, data‑protection, and risk‑management requirements

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.