Varun Ranga

Full-stack Developer @Wells Fargo

TX, US

Designed and implemented 12+ FHIR-compliant microservices for managing EHR, claims processing, and eligibility verification, improving data retrieval speed by 35% and ensuring seamless interoperability with HL7 and healthcare data exchange standards. • Developed and optimized RESTful and GraphQL APIs to support real-time patient record access, billing automation, and claims adjudication, reducing API response time by 40% and enhancing system scalability. • Integrated Apache Kafka and gRPC for event-driven architecture, enabling real-time data streaming for HL7 messages and secure inter-service communication, boosting system scalability by 50%. • Implemented CI/CD pipelines using Jenkins, Terraform, and GitHub Actions, reducing deployment time by 60% through automated infrastructure provisioning and code deployments on AWS. • Designed and secured authentication mechanisms using Spring Security 6 with OAuth 2.0 and JWT, implementing role-based access control (RBAC) to protect PHI and ensure HIPAA compliance. • Optimized SQL queries and NoSQL data models across PostgreSQL, MongoDB, and DynamoDB, achieving a 30% improvement in database query performance for patient data retrieval. • Integrated HL7, FHIR, and Facets-based claims processing workflows to streamline EDI 837/835 transactions, ensuring accurate and real-time healthcare claims adjudication. • Built interactive UI components using React 18+ with Redux Toolkit and Angular 17+ with RxJS, improving frontend load times by 45% for provider and patient portals. • Automated testing with JUnit 5, TestNG, and Rest-Assured, ensuring 100%-unit test coverage for backend services and improving overall application reliability.