Vishnu Arun Kumar Thumatty Rajan

- Contributed to the design, development, and modernization of a Spring Boot–based contract management system for the European Parliament. - Designed and implemented integrations with external systems hosted at the European Commission using both SOAP and RESTful web services. - Developed and maintained functionality for user management, group memberships, and role-based access control. - Led maintenance, production support, and multi-environment deployments, ensuring high availability and system reliability. - Played a key role in modernization initiatives, including migration from Spring to Spring Boot, Java 8 to Java 11, and JSP to Thymeleaf.

e-Parliament Services Contributed to the transformation of e-Parliament platforms towards a microservices-based architecture, enabling scalable and modular document processing systems. Designed and developed RESTful microservices for legislative document lifecycle management, including instantiation, prefill, and rendering across multiple document types. Ensured system reliability through production support, issue resolution, and coordinated deployments across environments. Played a key role in Spring Boot adoption and migration from monolithic to microservices architecture.

e-Parliament Services Designed and developed RESTful microservices for legislative document lifecycle management, including instantiation, prefill, and rendering across multiple document types.

Contributed to core lending platforms, developing contract appraisal workflows and enterprise search capabilities. Designed and implemented a Lucene/Solr-based search solution, enabling real-time search, ranking, and contextual filtering, significantly improving data retrieval performance. Developed front-office applications using Java EE and JSF, and supported development, maintenance, and Level-3 production support of the LEAP platform across environments. Resolved 200+ production issues within 200 days and delivered a key module 30% ahead of schedule.

Led development of statistical data dissemination platforms, delivering reliable and high-performance solutions for large-scale data processing. Built a custom web analytics system processing high-volume log data (~100GB), generating detailed monitoring and reporting insights. Developed XML-based data processing workflows and dataset views to support statistical data publication. Contributed to portal migration and modernization, including development of portlets and integration with LDAP/OID for secure access control. Ensured system stability and high availability during critical platform releases and data publication cycles.

Developed and maintained core modules in Oracle Financials (Accounts Receivable) and Oracle Reports (RXi), ensuring stability and performance of enterprise ERP systems. Acted as module owner for Oracle Reports, leading enhancements, fixes, and coordination across development activities. Introduced a structured bug triaging approach (“Autumn Cleaning”), grouping ~90 defects and reducing resolution time by ~40%. Optimized PL/SQL queries and database interactions to improve system performance and reliability. Collaborated with cross-functional teams to gather requirements, define technical specifications, and deliver solutions ahead of schedule.

Developed components of a medical insurance system for United Health Care, focusing on customer and claims data management. Automated batch processes, saving ~60+ hours per month and improving operational efficiency. Diagnosed and resolved a critical long-standing system issue using data flow analysis, restoring system stability. Led a team of 7 during training and onboarding, supporting smooth project ramp-up. Worked across multiple technologies including Java, Oracle, DB2, and mainframe systems. Recognized as Employee of the Month for innovation and problem-solving.