> Markdown version of [/jobs/ext/2305670-mainframe-application-developer-modernization](https://www.wearedevelopers.com/jobs/ext/2305670-mainframe-application-developer-modernization). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mainframe Application Developer - Modernization - **Company:** Computer Task Group, Inc - **Location:** New York, NY, United States - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Customer Information Control System (CICS), Cloud Computing, COBOL (Programming Language), Code Review, IBM DB2, Python (Programming Language), Mainframes, Software Engineering, Mainframe Programming, Information Technology - **Published:** August 30, 2026 - **Apply:** https://dejobs.org/x/x/41C2DF89AE984530BF723EB226E39CD5/job/ ## About the Role * Strong mainframe application development skills. * Proficiency with COBOL, CICS, and DB2. * Experience with application modernization and transformation initiatives. * Knowledge of APIs and integration between mainframe and non-mainframe environments. * Experience with application optimization and performance improvement. * Exposure to or experience with Java and/or Python in conjunction with mainframe technologies. * Strong analytical, problem-solving, and troubleshooting skills. * Excellent verbal and written communication skills. * Ability to work effectively with technical and business stakeholders. Experience: * 10+ years of industry experience. * Extensive experience developing and supporting mainframe applications. * Demonstrated experience with CICS, COBOL, and DB2. * Experience participating in application modernization initiatives, including one or more of the following: * Language migration. * Mainframe integration with non-mainframe environments using APIs. * Application optimization. * Use of Java and/or Python with mainframe technologies. * Experience in the financial services and/or cash management industry strongly preferred. * Experience working in collaborative, enterprise technology environments. Education: * Bachelor's degree in Computer Science, Information Technology, or a related field preferred, or equivalent combination of education and experience. Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required. ## Description * Develop, enhance, maintain, and modernize mainframe applications supporting critical business functions. * Analyze existing mainframe applications and identify opportunities for modernization, optimization, and improved performance. * Support application modernization initiatives, including language migration and integration with non-mainframe environments. * Develop and maintain applications using COBOL, CICS, and DB2. * Design and implement APIs and integration solutions connecting mainframe applications with distributed and cloud-based environments. * Collaborate with cross-functional teams, architects, business stakeholders, and technology teams to define and implement modernization solutions. * Troubleshoot application issues, perform root-cause analysis, and implement sustainable solutions. * Contribute to the adoption of modern technologies such as Java and/or Python alongside existing mainframe technologies. * Participate in code reviews, testing, deployment, and ongoing application support. * Ensure solutions meet organizational standards for quality, security, performance, and reliability. ## Related Videos - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Cloud as the new mainframe: why the cloud hype does not reflect the dev reality](https://www.wearedevelopers.com/videos/797-cloud-as-the-new-mainframe-why-the-cloud-hype-does-not-reflect-the-dev-reality) - [Data Fabric in Action - How to enhance a Stock Trading App with ML and Data Virtualization](https://www.wearedevelopers.com/videos/253-data-fabric-in-action-how-to-enhance-a-stock-trading-app-with-ml-and-data-virtualization) - [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data) - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) - [Migrating from COBOL with AI: A Moonshot Demo](https://www.wearedevelopers.com/videos/1531-migrating-from-cobol-with-ai-a-moonshot-demo) ## Related Articles - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [7 Important Tips That Every Software Developer Should Know](https://www.wearedevelopers.com/magazine/101-7-important-tips-that-every-software-developer-should-know) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Now is the time for industrialized software development](https://www.wearedevelopers.com/magazine/601-now-is-the-time-for-industrialized-software-development) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)