Sivasankari Nagarajan

Finxact Integration and DoorDash Implementation, Fiserv Inc.

• Led the implementation of Finxact integration, and successfully designed, developed, and certified over 100 REST APIs.
• Implemented REST APIs for the DoorDash application, enabling dashers to instantly receive their earnings through debit cards.
• Architected and implemented web services using Spring Boot and MapStruct, enhancing system efficiency and scalability.
• Deployed software updates and patches to ensure security and functionality.
• Improved and corrected existing software and system applications.
• Managed version control systems and maintained codebase integrity.

Data Acquisition -Action OI and Integrating Healthcare Enterprise (IHE), IBM Watson Health

• Designed and developed a Java application to convert raw data into the IBM FHIR model, uploaded the data into the IBM FHIR server, and conducted comparisons between data from two different components.
• Developed the IBM Watson Assistant chatbot, and imported skills to enhance its functionality.
• Migrated the application from CDT to a VPC environment, incorporating CI/CD toolchains, App ID, and containerization with Docker and Kubernetes.
• Delegated work and assignments to team members, providing guidance through technical issues and challenges.
• Conducted detailed explorations of IBM cloud products to facilitate the migration of existing applications to the cloud for enhancements.
• Participated in architectural and design review sessions, proposing alternative technical solutions to enhance client requirements with increased efficiency, reusability, and longevity.
• Identified system deficiencies and implemented effective solutions, including identifying and creating reusable code for the code library.
• Mentored and coached team members, built competencies to ensure successful project delivery, and developed personal development plans through counseling and guidance.

Espresso Disbursement, Tata Consultancy Services.

• Developed RESTful web services using Spring Boot and MongoDB.
• Designed, built, and deployed CI/CD pipelines in Microsoft Azure.
• Adhered to client-specified coding and quality standards.
• Identified and resolved application security vulnerabilities, including addressing Veracode bugs, and applying necessary patches.

Government e-Procurement

• Worked as a Full Stack Developer on n-tier artifacts, including HTML pages, JavaScript pages, custom components, SQL scripts, and cascading style sheets (CSS) based on client-provided mock wireframes.
• Designed and developed technical solutions for projects.
• Conducted coding with a focus on optimization, analyzing the ramifications of coding decisions, and applying object-oriented design principles. Proficient in JAVA, J2EE, and RESTful web services.
• Created and managed various reports, such as User Management, Tender Management, Statistical, Payment Management, and Miscellaneous reports, for eProcurement running in 42 instances nationwide.
• Participated in unit testing to ensure code quality.
• Resolved tender-related queries for government organizations and tender participants.
• Prepared technical documentation, including SRS, FRS, user manuals, presentations, and web content.
• Executed several diverse database queries.