Mainframe Developer

MainframeMaster; New York (NY); On-site; USD 85,000 - 97,000; Full time

Benefits offered by this job

Health insurance

401(k) retirement savings plan

Paid time off and holidays

Life and disability insurance

Employee assistance program

Job summary

Capgemini in New York is seeking a Mainframe Developer to analyze, support, and modernize legacy Mainframe applications while transforming COBOL-DB2-VSAM workloads to Java on AWS.

You will work in an Agile team, use Claude-assisted code transformation tools, perform testing and deployments, and collaborate with stakeholders to ensure functional equivalence and production success.

Qualifications

• Experience with mainframe development, support, batch processing, and file handling.
• Experience with mainframe modernization, COBOL-to-Java migrations.
• Hands-on experience using Claude to support development and modernization efforts.
• Proficiency in Java and AWS cloud environments for migration/deployment.

Responsibilities

• Analyze, support, and modernize legacy Mainframe applications.
• Develop, enhance, maintain, and support COBOL/JCL/DB2/VSAM applications.
• Perform impact analysis and modernization opportunities.
• Collaborate with business stakeholders, architects, and cross-functional teams in an Agile environment.

Skills

Mainframe technologies

COBOL

JCL

DB2

VSAM

Java

AWS

AI tools (Claude)

Agile / JIRA

Testing / UAT

Tools

JIRA

AWS tooling

Job description

# Mainframe DeveloperCapgeminipermanentNew York, NY, US0 viewsPosted November 5, 2026## Job DescriptionChoosing 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.Job DescriptionJoin our Financial Services Business Unit as a **Mainframe** Developer, where you will play a key role in analyzing, supporting, and modernizing legacy **Mainframe** applications while helping drive their transformation to **Java**-based solutions on **AWS**.ResponsibilitiesPerform detailed system analysis, requirement gathering, and technical design for **Mainframe** applications.Develop, enhance, maintain, and support applications using **COBOL**, **JCL**, **DB2**, and **VSAM**.Analyze existing **Mainframe** batch applications, job streams, business processes, and application dependencies.Perform impact analysis to assess the effects of application changes, modernization efforts, and decommissioning activities on upstream and downstream systems.Analyze interfaces, data flows, batch schedules, and business rules to identify dependencies, risks, and modernization opportunities.Support application rationalization and decommissioning of legacy **Mainframe** applications.Participate in **Mainframe** modernization initiatives involving the migration and transformation of **COBOL**-**DB2** applications into **Java**-based applications on **AWS**.Utilize Claude-assisted code transformation tools to support code analysis, conversion, refactoring, and documentation activities.Execute unit testing, integration testing, and support User Acceptance Testing (UAT).Validate functional equivalence between legacy **Mainframe** applications and modernized **Java** applications.Participate in production deployments and perform Post Verification Testing (PVT).Provide periodic testing, production support, troubleshooting, and research support.Collaborate with business stakeholders, architects, and cross-functional teams in an Agile environment.Maintain project documentation and work management activities using JIRA.Be flexible and willing to work across different IST shifts based on project requirements.Required SkillsStrong experience with **mainframe** technologies including **COBOL**, **JCL**, **DB2**, and **VSAM**Experience with **mainframe** application development, support, batch processing, and file handlingExperience with **mainframe** modernization, legacy application transformation, and **COBOL**-to-**Java** migration initiativesHands-on experience leveraging AI tools such as Claude to support application development, analysis, and modernization effortsProficiency in **Java** development and **AWS** cloud environments, including application migration and deploymentExperience performing application impact assessments, dependency mapping, system analysis, and technical designKnowledge of legacy system rationalization, decommissioning, and modernization planningExperience with unit testing, integration testing, production support, and troubleshootingFamiliarity with Agile delivery methodologies and tools such as JIRAThe base compensation range for this role in the posted location is: 85,000 - 96,655.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 LeaveMedical, 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 insuranceEmployee assistance programsOther benefits as provided by local policy and eligibilityImportant 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.DisclaimersCapgemini 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. If you need assistance or accommodation, please reach out to your recruiting contact.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.Click the following link for more information on your rights as an Applicant in the United States.http://www.capgemini.com/resources/equal-employment-opportunity-is-the-lawCapgemini 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.## How to ApplyApply directly through the application link above