**Experience** + Experienced in Financial services and account receivables and payments product processors and kwnoledgable of the various industry standards and file formats specification such as EDI, ACH, XML, BAI/BAI2, Comma or Pipe delimeted files as well as Sequential and text file fomatting. **Key Responsibilities** + Develop, maintain, and enhance mainframe applications. + Analyze business requirements and design technical solutions. + Write and test COBOL, JCL, and other mainframe code. + Debug and resolve application issues. + Optimize application performance. + Create and maintain technical documentation. + Collaborate with other developers, business analysts, and stakeholders. + Participate in code reviews. + Stay up-to-date on new mainframe technologies. **Programming Languages:** + **COBOL:** Proficiency in COBOL is fundamental. This includes a deep understanding of COBOL syntax, data structures, and program control flow. Experience with different COBOL dialects (e.g., IBM COBOL, Micro Focus COBOL) is a plus. + **JCL (Job Control Language):** Expertise in JCL is essential for submitting jobs, managing datasets, and controlling the execution of programs on the mainframe. This includes a thorough understanding of JCL syntax, parameters, and system commands. + **REXX:** Familiarity with REXX scripting language is helpful for automating tasks and interacting with the mainframe environment. **Database Management Systems:** + **DB2:** Strong experience with IBM's DB2 relational database management system is crucial. This includes skills in SQL, database design, performance tuning, and data management. **Transaction Processing Systems:** + **CICS (Customer Information Control System):** In-depth knowledge of CICS is often required for developing online transaction processing applications. This includes understanding CICS commands, programming techniques, and system administration. **Data Storage and Access Methods:** + **VSAM (Virtual Storage Access Method):** Understanding of VSAM file structures and access methods is important for working with mainframe data. + **Sequential Files:** Knowledge of sequential file processing techniques. **Operating System:** + **z/OS:** A solid understanding of the z/OS operating system is fundamental. This includes knowledge of system services, security features, and resource management. **Essential Skills and Knowledge** **SDLC (Software Development Life Cycle):** + Familiarity with different SDLC methodologies (e.g., Waterfall, Agile) and their application in a mainframe environment. **Debugging and Problem Solving:** + Strong analytical and problem-solving skills are essential for debugging complex mainframe applications. This includes the ability to use debugging tools and techniques to identify and resolve issues. **Performance Tuning:** + Experience in optimizing mainframe applications for performance and efficiency. This includes identifying performance bottlenecks and implementing solutions to improve response times and resource utilization. **Security:** + Understanding of mainframe security concepts and best practices. This includes knowledge of RACF (Resource Access Control Facility) or other security systems. **Testing:** + Experience in testing mainframe applications, including unit testing, integration testing, and system testing. **Documentation:** + Ability to create clear and concise documentation for mainframe applications. **Soft Skills** **Communication:** + Excellent written and verbal communication skills are essential for collaborating with other developers, business analysts, and stakeholders. **Teamwork:** + Ability to work effectively in a team environment. **Problem-Solving:** + Strong analytical and problem-solving skills. **Adaptability:** + Ability to adapt to changing priorities and technologies. **Learning Agility:** + A willingness to learn new technologies and techniques. **Optional/Preferred Skills** **DevOps:** + Experience with DevOps practices and tools in a mainframe environment. **Automation:** + Experience in automating mainframe tasks using scripting languages or tools. **Cloud Integration:** + Knowledge of integrating mainframe applications with cloud platforms. **Modernization:** + Experience in modernizing mainframe applications using new technologies. Esta y todas las ofertas de CITIGROUP SERVICES CHILE SPA se encuentran bajo el marco de la Ley 21015 que incentiva la inclusión de personas en situacion de discapacidad al mundo laboral. ------------------------------------------------------ **Job Family Group:** Technology ------------------------------------------------------ **Job Family:** Applications Development ------------------------------------------------------ **Time Type:** Full time ------------------------------------------------------ **Most Relevant Skills** Please see the requirements listed above. ------------------------------------------------------ **Other Relevant Skills** For complementary skills, please see above and/or contact the recruiter. ------------------------------------------------------ _Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law._ _If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review_ _Accessibility at Citi (https://www.citigroup.com/citi/accessibility/application-accessibility.htm)_ _._ _View Citi’s_ _EEO Policy Statement (https://www.citigroup.com/global/eeo-aa-policy)_ _and the_ _Know Your Rights (https://www.eeoc.gov/sites/default/files/2023-06/22-088\_EEOC\_KnowYourRights6.12ScreenRdr.pdf)_ _poster._ Citi is an equal opportunity and affirmative action employer. Minority/Female/Veteran/Individuals with Disabilities/Sexual Orientation/Gender Identity.