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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mainframe Programmer - SWIFT & Financial Messaging Platform - **Company:** Brown Brothers Harriman & Co. - **Location:** Boston, MA, United States - **Experience:** Expert - **Salary:** $110,000 - $160,000 - **Contract:** Permanent contract - **Skills:** Application Performance Management, Customer Information Control System (CICS), COBOL (Programming Language), Code Review, Computer Programming, Databases, System Configuration, Extract Transform Load (ETL), IBM DB2, Disaster Recovery, Middleware, IBM Software, Monitoring of Systems, Job Control Language (JCL), Mainframes, Performance Tuning, Standard Sql, Software Engineering, Z/OS, Transaction Processing (Computing), System Availability, Swift (Programming Language), Information Technology, Software Version Control, Ibm Integration Bus - **Published:** November 10, 2026 - **Apply:** https://www.careerbuilder.com/job-details/mainframe-programmer-swift-financial-messaging-platform-boston-ma--3df3c424-0c5d-4f4f-aeed-a68efacf53a1 ## About the Role Mainframe Computer, Swift, Computer Programming, Mainframe Computer, Swift, Computer Programming, IBM DB2, Transaction Processing/Management, Payment Processing, IBM CICS (Customer Information Control System), * 10+ years of hands-on mainframe development and support experience in large-scale enterprise environments. * Strong expertise in: * COBOL * JCL * DB2 * CICS * MQ * z/OS (MVS) * ChangeMan or equivalent source control/change management tools * Experience installing, configuring, and supporting IBM software products. * Experience with IBM Financial Transaction Manager (FTM) or similar financial transaction processing platforms. * Strong SQL, and performance tuning experience within DB2 environments. * Experience troubleshooting complex production issues and conducting root-cause analysis. * Experience with system monitoring and application performance optimization. * Excellent verbal and written communication skills. * Ability to work effectively in a fast-paced, high-availability financial services environment. * Strong analytical and problem-solving skills with a focus on delivering reliable, scalable solutions., * Experience supporting financial services transaction processing systems. * Familiarity with SWIFT messaging standards and infrastructure. * Experience with IBM Integration Bus (IIB) or related integration technologies. * Knowledge of payment processing, settlements, or banking operations. * Bachelor's degree in Computer Science, Information Technology, or a related discipline (preferred but not required)., You are a seasoned Mainframe Engineer who thrives in a mission-critical financial environment. You bring deep expertise in COBOL, DB2, MQ, CICS, JCL, and z/OS, enjoy solving complex technical challenges, and have experience supporting high-volume transaction processing platforms. SWIFT knowledge is valuable, but your primary strength is the support, maintenance, and optimization of mission-critical mainframe financial messaging applications. ## Description Brown Brothers Harriman is seeking an experienced Mainframe Programmer to join our Data Movement Technology team. This role is ideal for a highly skilled mainframe professional with extensive experience in enterprise transaction processing, COBOL development, DB2, CICS, z/OS, and IBM middleware. While knowledge of SWIFT messaging is beneficial, the primary focus of this position is the support, maintenance, and optimization of mission-critical mainframe applications that support financial messaging and payment processing operations. The successful candidate will play a key role in the full software development lifecycle, including analysis, design, coding, testing, implementation, troubleshooting, performance tuning, and production support within a high-availability mainframe environment. The successful candidate will play a key role in the maintenance, support, and operational stability of business-critical mainframe applications. Responsibilities will include incident analysis and resolution, production/testing support, performance tuning, monitoring system health, application upgrades, troubleshooting, and ensuring the reliability and availability of high-volume financial transaction processing systems within a 24x7 environment. Limited development work may be required to support enhancements, defect remediation, and regulatory or business-driven changes. In addition this position also provides an excellent opportunity to expand technical expertise by gaining hands-on experience with the SWIFT network, financial messaging technologies, and distributed platforms that support BBH's global payment and data movement infrastructure. Key Responsibilities * Support and maintain critical mainframe applications that support financial transaction processing and messaging. * Provide application support using COBOL, JCL, DB2, MQ, CICS and z/OS and technologies. * Troubleshoot production issues, perform root-cause analysis, and ensure system stability. * Support, install and administer IBM Financial Transaction Manager (FTM). * Monitor application and system performance and implement improvements as needed. * Collaborate with operations, infrastructure, database, network, and support teams. * Participate in code reviews and support application enhancements and defect fixes. * Create and maintain technical and operational documentation. * Follow change management and release processes using tools such as ChangeMan. * Participate in an on-call rotation to support high availability requirements. * Support Business Continuity Planning (BCP) and Disaster Recovery (DR) activities. * Support SWIFT Customer Security Programme (CSP) requirements. * Contribute to platform reliability, operational efficiency, and modernization initiatives.