Mainframe application development

• Design, develop, and maintain mainframe batch and online applications supporting capital markets and banking workflows
• Develop and enhance COBOL programs for business critical processing logic
• Build and support CICS online transactions with strong performance and availability SLAs
• Create, maintain, and tune JCL jobs for large scale batch processing and scheduling
• Design and optimize DB2 (z/OS) database access, SQL queries, and indexing strategies
• Work with VSAM datasets, file definitions, and data access patterns
• Perform root cause analysis and resolve production defects efficiently
• Support audit, regulatory, and compliance requirements through controlled and traceable changes
• Collaborate with business analysts, QA teams, and operations in Agile delivery models
• Participate in code reviews, performance tuning, and mentoring of junior resources

• COBOL (Batch & Online)
• CICS transaction processing
• JCL (Job Control Language) scheduling, restart/recovery, performance tuning
• DB2 z/OS Application Programming
• VSAM (KSDS, ESDS, RRDS)
• Strong understanding of Mainframe architecture and z/OS utilities

Financial Services / Capital Markets Domain Experience

• Experience with broker dealer, banking, or capital markets systems
• Knowledge of high volume transaction processing and batch cycles
• Understanding of data reconciliation, controls, and audit trails
• Familiarity with regulatory environments and change control processes
• Experience supporting 24x7 production systems with strict SLAs

Nice to Have Skills

• z/OS Connect or API enablement of mainframe applications
• Mainframe modernization exposure (refactoring, API enablement, or coexistence models)
• Tools such as EASYTRIEVE, REXX, or schedulers (e.g., CA 7)
• Experience working in distributed + mainframe hybrid architectures
• Familiarity with CI/CD practices adapted for mainframe ecosystems

Soft Skills

• Strong analytical and problem solving abilities
• Ability to translate complex business requirements into technical solutions
• Clear communication with business and technical stakeholders
• Mentoring and technical leadership mindset

Ecolab + Austin, TX + $81,200-121,700 per year As the industry leader in water technology, we're growing and need talented people like you to help us continue to protect the world's most vital resource. Nalco Water, an Ecolab…, © 2026 Careerjet All rights reserved