Senior Software Engineer- Mainframe

Responsibilities and Duties: This senior-level position is an integral member of an agile software engineering team responsible for designing, developing, enhancing, and supporting business-critical enterprise applications. The engineer will provide deep mainframe expertise for high-volume, file-based financial processing and will participate throughout the software delivery lifecycle, from requirements and technical design through development, testing, implementation, and production support. Software Design and Engineering: Create engineering specifications and technical designs for mainframe applications, batch programs, interfaces, data-transformation processes, and supporting components. Mainframe Development: Design, develop, test, implement, and maintain senior-level mainframe solutions using COBOL, JCL, z/OS tools, batch-processing patterns, and flat-file interfaces. Financial Data Processing: Maintain and enhance rules that standardize source data, map financial attributes and General Ledger accounts, validate required information, and transform transactions into client-ready financial feeds. Interface and Data Support: Develop and support inbound and outbound file processing, interface extracts and passbacks, translation and validation tables, control-total files, journal-entry outputs, and detail and summary files. Production Support: Diagnose and resolve production abends, failed batch jobs, file-processing errors, data discrepancies, mapping defects, balancing failures, and reconciliation issues. Perform safe restart and recovery activities and communicate impacts and status promptly. Controls and Auditability: Preserve data integrity and financial-control requirements through duplicate-file checks, record and control-file balancing, traceability, reconciliation, and evidence needed for audit or compliance reviews. Integration Delivery: Partner with Finance, Accounting, Business Systems Analysts, data and integration teams, operations, architecture, testing, and product teams to deliver new interfaces, financial feeds, platform changes, and client or line-of-business onboarding. Software Quality: Write code that adheres to coding standards, perform code reviews, develop unit and integration tests, and follow source-control, build, deployment, testing, and change-management practices. Agile Execution: Participate in scrum ceremonies, sprint planning, backlog refinement, estimation, story creation, definition of done, acceptance criteria, task creation, status updates, and final execution of software changes. Technical Leadership: Evaluate technical alternatives, identify feasibility and operational trade-offs, safeguard functionality and performance, communicate blockers, document support procedures, and mentor associate and intermediate engineers.

Additional Responsibilities: Participate in scheduled production support and after-hours implementation or incident coverage as required. Perform other duties as assigned or requested.

Education: Bachelor's degree in Computer Science, Computer Engineering, Computer and Information Science, or a closely related field, or equivalent relevant experience consistent with company hiring standards.

Experience: At least 5 years of professional software engineering experience designing, building, deploying, and supporting scalable, highly available, or business-critical systems. Senior-level knowledge of mainframe systems, demonstrated through substantial hands-on experience with z/OS application development, production batch operations, troubleshooting, implementation, and support. Strong hands-on experience developing and maintaining COBOL programs and JCL, including job streams, file-based processing, dependency handling, abnormal-end diagnosis, restart and recovery, and production implementation. Experience supporting large-scale batch applications that process financial, accounting, claims, billing, payment, or similarly controlled enterprise data. Experience with algorithm and data-structure fundamentals, system design, technical feasibility evaluation, design patterns, and maintainable application architecture. Experience translating business requirements, technical specifications, prototypes, interface definitions, or user stories into working software solutions.

Skills/Competencies: Advanced proficiency in COBOL and JCL for enterprise mainframe batch development and support. Strong understanding of z/OS, mainframe datasets, flat-file layouts, record processing, job dependencies, control files, batch scheduling, operational monitoring, and failure recovery. Working knowledge of SQL and relational data concepts. Experience with Oracle or PeopleSoft-related tables and query tools is beneficial for financial translation and validation processing. Ability to analyze complex data flows across source extracts, translation processes, passback files, control totals, detail and summary outputs, data-warehouse feeds, and General Ledger interfaces. Knowledge of professional software-engineering practices across the full SDLC, including coding standards, unit testing, code reviews, source control, build and deployment processes, operations, and technical documentation. Experience with Agile/Scrum delivery and work-management tools such as Jira, RTC, or Digital.ai Agility. Strong production-support, root-cause-analysis, problem-solving, and incident-communication skills. Ability to collaborate with technical and non-technical partners and translate financial or operational requirements into reliable technical solutions. Ability and willingness to mentor less-experienced engineers and serve as a senior technical resource.

Certifications: None required.

Other Requirements: Travel requirement: 0% to 25%. Ability to support planned implementations, batch-processing windows, and critical production incidents outside standard business hours when required. Must comply with applicable privacy, information-security, confidentiality, HIPAA, Code of Business Conduct, legal, regulatory, and training requirements. Key Attributes: Senior technical judgment, ownership, urgency, attention to detail, accountability, analytical thinking, clear communication, collaboration, adaptability, and a strong commitment to reliable financial processing and data integrity.

Preferred Qualifications: Master's degree in Computer Science, Computer Engineering, Information Systems, or a related field.7 or more years working with varied technology systems, designing solutions, or developing applications in healthcare, financial services, or another highly controlled industry. Prior experience supporting General Ledger, accounting, reconciliation, journal-entry, claims, billing, payment, or financial-reporting applications. Experience with a mainframe-based financial translation or interface application. Prior experience with the specific in-house application is not required. Experience with Oracle or PeopleSoft data structures, Informatica or enterprise data-integration processes, managed file-transfer patterns, data-warehouse integrations, and enterprise job scheduling. Experience with translation tables, validation rules, financial mappings, balancing controls, duplicate-file checks, reconciliation, and audit evidence. Knowledge of healthcare payer data and financial feeds. Exposure to Java, Python, JavaScript, C/C++, or other programming languages that support broader engineering work and modernization initiatives.