> Markdown version of [/jobs/ext/2424940-cobol-mainframe-developer](https://www.wearedevelopers.com/jobs/ext/2424940-cobol-mainframe-developer). 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). --- # Cobol / Mainframe Developer - **Company:** Ampcus Inc - **Location:** Milwaukee, WI, United States - **Experience:** Expert - **Salary:** $60,000.0 - $135,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Access, HTML, Java (Programming Language), JavaScript (Programming Language), IBM AIX, Amazon Web Services, Unit Testing, Microsoft Azure, Bash Shell, Batch Processing, Unix, Cascading Style Sheets (CSS), Customer Information Control System (CICS), Cloud Computing, COBOL (Programming Language), IBM DB2, Linux, Programming Tools, Eclipse (Software), Enterprise JavaBeans, Java Platform Enterprise Edition (J2EE), Hibernate (Java), Job Control Language (JCL), IBM WebSphere MQ, IBM Websphere Application Server, IntelliJ IDEA, JavaBeans, Java Database Connectivity, Java Servlet, Apache Struts, JSON, Java Specification Requests (JSRs), Mainframes, Microsoft Visual Studio, MVS (OS), Object-Oriented Software Development, OpenShift, Windows PowerShell, RabbitMQ, Simple Object Access Protocol (SOAP), Software Engineering, SQL Databases, TypeScript, Virtual Storage Access Methods, Extensible Markup Language (XML), XPath, Z/OS, Tso/ispf, File Transfer Protocol (FTP), ReactJS, Spring-boot, File-aid, Backend, Vue.js, Event Driven Architecture, AngularJS, Kubernetes, Information Technology, Avro, Easytrieve, Apache Kafka, Software Coding, JestJS, Restful APIs, Domain Driven Design, Docker, Microservices, Control M - **Published:** August 31, 2026 - **Apply:** https://www.careerjet.com/job/usfe8f959fa3dce01a681887f4bf9d4d9e/eaa ## About the Role This is for a Cobol / Mainframe Developer who would work within Card Management Systems. * Must need to have an experience with Mainframe. * Need a strong experience with Cobol Programming and JCL. * Will be responsible for handling backend business logics. * Experience with Payment Transactions or Debit Transactions area would be nice to have. * Must need to have hands-on coding experience. * Previous Client experience is a great to have., * Bachelor's degree in Computer Science, Information Technology or equivalent experience. * 8 years of software development engineering experience. * Working knowledge in Linux, UNIX & z/OS operating systems. * Proficient with Mainframe Development as well as modern Object-Oriented development. * Need to be able to develop in both a legacy Mainframe TSO environment and also a modern server/container environment using common IDE's and development tools. * Knowledge and experience in transformation/modernization of processing high volumes of data via Mainframe processing to scalable On-prem Distributed or Cloud processing via microservices and containers. * Knowledge of the following: File Transmission (FTP/NDM) & batch processing in very high-volume settings is required. * Knowledge of event driven architecture and common event processing models and platforms is desired. * Experience in technical design writing and documentation. * Work independently and collaborate in team design sessions. * Strong unit testing skills. * Flexibility to be on on-call support, as required. * Excellent written and verbal communication skills. * Experience in Financial Services industry. * Experience in decomposing and rewriting legacy processes and systems into more modern infrastructures a plus. * Familiarity in microservice architectures and containers (Kubernetes/K8s, OpenShift, Docker) a plus. * Familiarity in processing in a cloud (Azure, AWS) environment a plus. * Familiarity in Domain Driven Design a plus. Technical Experience * Linux, UNIX (AIX), z/OS. * Powershell, Bash/UNIX Scripting. * JAVA, J2EE, EJB, JavaBeans, JavaScript, servlets, JDBC, struts, JSR-352, Hibernate. * React, Angular, Vue, TypeScript, HTML, CSS, JavaScript, Vitest, Jest. * COBOL, CICS, MVS, JCL, VSAM, TSO/ISPF, FileAid, CA-EasyTrieve, Schedule tool (CA-7), Control-M, Abend-AID. * Eclipse, IntelliJ, Visual Studio Code, IBM Developer for z/OS. * JSON, AVRO, XML, XPath. * SOAP & Restful API's. * WLP, WebSphere, Open Liberty, Quarkus, Spring Boot/Batch. * Kafka, RabbitMQ, MQ Series. * DB2, SQL, MS Access, Yugabyte. * FTP/SFTP, NDM. ## Related Videos - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [From event streaming to event sourcing 101](https://www.wearedevelopers.com/videos/91-from-event-streaming-to-event-sourcing-101) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) ## Related Articles - [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) - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025) - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [Software Developer Salary in Switzerland [2023]](https://www.wearedevelopers.com/magazine/215-software-developer-salary-in-switzerland-2023)