Mainframe Developer

Capgemini; Hartford (CT); On-site; USD 120,000 - 156,000; Full time

Job summary

Capgemini seeks a Senior Mainframe SME to guide code analysis and reverse engineering during large-scale modernization projects in Hartford, CT. You will apply deep IBM mainframe expertise across COBOL, JCL, CICS, DB2, IMS DB/DC, and VSAM to document legacy architectures and dependencies.

Collaborating with customer SMEs and modernization teams, you will drive discovery, governance, and targeted architecture discussions, delivering actionable recommendations and traceable documentation.

Qualifications

• Strong expertise in IBM Mainframe technologies.
• Extensive experience with COBOL, JCL, CICS, DB2, IMS, and VSAM.
• Deep understanding of batch and online processing environments.
• Experience with code analysis, reverse engineering, and discovery tools.
• Knowledge of SDLC and mainframe modernization approaches.

Responsibilities

• Lead the mainframe code analysis and reverse engineering workstream for modernization programs.
• Define analysis strategies, deliverables, timelines, and governance processes.
• Provide technical leadership to architects, analysts, and development teams.
• Review project progress, risks, dependencies, and mitigation plans.
• Produce detailed analysis reports and system documentation.

Skills

COBOL

JCL

CICS

DB2

IMS/DB

VSAM

MQ Series

REXX

Easytrieve

CA7/Control-M

Endevor/Changeman

Job description

Mainframe Developer

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world.

Location: Hartford, CT

Job Description

Experience

• 12+ Years of Mainframe Application Development, Modernization, Reverse Engineering, and Legacy System Analysis.

Role Summary

We are seeking an experienced Senior Mainframe SME to lead the mainframe code analysis and reverse engineering phase of large-scale modernization and transformation programs. The candidate will provide deep technical expertise across IBM Mainframe technologies, collaborate with customer and internal stakeholders, and drive the successful assessment, understanding, and documentation of legacy applications.

Key Responsibilities

Program Leadership & Governance

• Lead the overall code analysis and reverse engineering workstream for mainframe modernization programs.


• Define analysis strategies, deliverables, timelines, and governance processes.


• Provide technical leadership to architects, analysts, and development teams.


• Review project progress, risks, dependencies, and mitigation plans.


• Ensure quality and completeness of application discovery and documentation.

Mainframe Code Analysis & Reverse Engineering

• Analyze and reverse engineer complex legacy applications to identify business processes, application functionality, and technical dependencies.


• Perform application inventory and portfolio assessment.


• Identify program-to-program, batch, online, database, and external interface dependencies.


• Derive business rules and functional workflows from legacy code.


• Create application architecture diagrams, data flow diagrams, and system documentation.


• Support automated and manual code discovery activities.

Technical Expertise

• Provide SME guidance on IBM Mainframe technologies including:


• COBOL


• JCL


• CICS


• DB2


• IMS DB/DC


• VSAM


• MQ Series


• REXX


• Easytrieve


• CA7/Control-M Schedulers


• Endevor/Changeman


• Evaluate modernization, remediation, and migration approaches.


• Support application decomposition and target-state architecture discussions.

Stakeholder Collaboration

• Work closely with customer SMEs, business users, architects, and modernization teams.


• Conduct technical workshops, requirement discussions, and knowledge transfer sessions.


• Present findings, recommendations, and analysis reports to leadership stakeholders.


• Act as the primary technical escalation point for mainframe-related issues.

Documentation & Reporting

• Produce detailed analysis reports, dependency matrices, and application assessments.


• Document business processes, application architecture, interfaces, and data models.


• Prepare executive summaries and modernization recommendations.


• Maintain traceability between business functions and legacy code components.

Required Skills & Qualifications

• Strong expertise in IBM Mainframe technologies.


• Extensive experience in COBOL, JCL, CICS, DB2, IMS, and VSAM.


• Deep understanding of batch and online processing environments.


• Experience with code analysis, reverse engineering, and application discovery tools.


• Strong knowledge of software development lifecycle (SDLC) and application modernization methodologies.


• Experience in legacy application assessment and transformation programs.

The base compensation range for this role in the posted location is: $120000 to $155800

Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws. The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to: Geographic location, Education and qualifications, Certifications and licenses, Relevant experience and skills, Seniority and performance, Market and business consideration, Internal pay equity.

It is not typical for candidates to be hired at or near the top of the posted compensation range.

In addition to base salary, this role may be eligible for additional compensation such as variable incentives, bonuses, or commissions, depending on the position and applicable laws.

Capgemini offers a comprehensive, non-negotiable benefits package to all regular, full-time employees. In the U.S. and Canada, available benefits are determined by local policy and eligibility and may include:

• Paid time off based on employee grade (A-F), defined by policy: Vacation: 12-25 days, depending on grade, Company paid holidays, Personal Days, Sick Leave


• Medical, dental, and vision coverage (or provincial healthcare coordination in Canada)


• Retirement savings plans (e.g., 401(k) in the U.S., RRSP in Canada)


• Life and disability insurance


• Employee assistance programs


• Other benefits as provided by local policy and eligibility

Important Notice

Compensation (including bonuses, commissions, or other forms of incentive pay) is not considered earned, vested, or payable until it becomes due under the terms of applicable plans or agreements and is subject to Capgemini’s discretion, consistent with applicable laws. The Company reserves the right to amend or withdraw compensation programs at any time, within the limits of applicable legislation.

Disclaimers

Capgemini is an Equal Opportunity Employer encouraging inclusion in the workplace. Capgemini also participates in the Partnership Accreditation in Indigenous Relations (PAIR) program which supports meaningful engagement with Indigenous communities across Canada by promoting fairness, accessibility, inclusion and respect. We value the rich cultural heritage and contributions of Indigenous Peoples and actively work to create a welcoming and respectful environment. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity/expression, age, religion, disability, sexual orientation, genetics, veteran status, marital status or any other characteristic protected by law.

This is a general description of the Duties, Responsibilities and Qualifications required for this position. Physical, mental, sensory or environmental demands may be referenced in an attempt to communicate the manner in which this position traditionally is performed. Whenever necessary to provide individuals with disabilities an equal employment opportunity, Capgemini will consider reasonable accommodations that might involve varying job requirements and/or changing the way this job is performed, provided that such accommodation does not pose an undue hardship. Capgemini is committed to providing reasonable accommodation during our recruitment process.

Please be aware that Capgemini may capture your image (video or screenshot) during the interview process and that image may be used for verification, including during the hiring and onboarding process.

Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.

Ref. code: 528250

Posted on: Aug 5, 2026

Experience Level: Experienced Professionals

Contract Type: Permanent

Location:

New York, NY, US

Brand: Capgemini

Professional Community: Software Engineering

Capgemini is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity/expression, age, religion, disability, sexual orientation, genetics, veteran status, marital status or any other characteristic protected by law.