Design, develop, modify, and enhance applications using SYNON/COOL 2E, COBOL400, CL/400, CLLE, and DB2/400. Develop and support RxCLAIM / pharmacy claims adjudication functionality and related business processes. Analyze and enhance complex claim processing logic, including business rules and system workflows. Develop and maintain integrations with downstream healthcare and PBM systems. Perform major enhancements and modifications to existing healthcare applications. Maintain, modernize, and improve existing AS/400 applications while developing new solutions. Analyze, troubleshoot, and resolve complex production and application issues. Investigate system defects, identify root causes, and implement effective technical solutions. Translate business requirements into technical designs and application changes. Document system flows, application functionality, interfaces, and business logic. Perform impact analysis for application changes and ensure changes do not negatively affect downstream processes. Conduct unit testing, integration testing, and support system/user acceptance testing as required. Collaborate with business analysts, technical teams, QA teams, and healthcare/PBM stakeholders. Deliver high-quality, reliable code with minimal supervision. Take ownership of assigned development activities and meet project milestones and deadlines. Provide technical guidance and assume leadership responsibilities when needed.