Position Summary: Ecosistemas Global is seeking a Senior COBOL Developer to join a major financial client, focused on mainframe program analysis, design and development. Key Highlights: 1. Mainframe program analysis, design and development 2. Functional and technical solution design creation 3. Batch and online execution support and monitoring We are Ecosistemas Global, a technology company that connects our clients with tailored, comprehensive and innovative solutions. We operate in more than 15 countries, including Argentina, Chile, Brazil, Mexico, the United States and Spain. With 30 years of experience and a multidisciplinary team of over 500 professionals, we are driven by our commitment to grow every project and client we work with. We want you to be part of this great team! What are we looking for? A Senior COBOL Developer to join a major financial client. Work Location: CABA Work Modality: Hybrid Working Hours: Monday to Friday, 9 a.m. to 6 p.m. What will be your responsibilities? In this role, you will have the opportunity to: Analyze, design and develop mainframe programs (COBOL, CICS, JCL) according to project requirements. Create functional and technical solution designs, including corresponding documentation. Provide support and monitor both Batch and online task executions. What do we require? You must have: Knowledge of VSAM files and Changeman version control. SQL proficiency. Proficiency in CICS programs, COBOL Batch, JCL, SCLM, Zscople TN3270 system, JIRA and Atlassian tools. Desirable Requirements: Knowledge of Teradata, AWS. Knowledge of Payment Methods or financial system institutions. English language proficiency. We offer excellent benefits, growth opportunities and professional development support. At Ecosistemas Global, we believe diversity enriches our culture and perspectives; therefore, we actively foster an inclusive environment where each individual—regardless of origin, gender, orientation, abilities or beliefs—is not only welcome but also essential to our success. We value and respect all voices, and invite you to join our team, where inclusion is a fundamental pillar of our values. -Requirements- Minimum Education: Tertiary years of experience Keywords: developer, programmer, senior, sr