Nirmal Kumar Mohanta

Experienced Java Backend Developer with 3.5 years of professional experience in designing, developing, and maintaining scalable, secure, and high-performance backend applications. I have strong expertise in Java (11/17), Core Java concepts, and Spring Boot, with hands-on experience building microservices-based architectures for enterprise applications, particularly in banking and telecom domains. I have successfully designed and exposed RESTful APIs, integrated multiple backend services, and ensured seamless inter-service communication using OpenFeign and API Gateway patterns. My technical expertise includes implementing robust security solutions using Spring Security, OAuth2, JWT, and Keycloak to ensure secure authentication and authorization across distributed systems. I have practical experience working with relational and NoSQL databases such as MySQL and MongoDB, where I designed optimized schemas, wrote efficient queries, and managed large-scale datasets. I have also worked with Apache Kafka for event-driven communication and asynchronous processing, improving system scalability, fault tolerance, and performance. I have implemented resilience and fault-tolerance mechanisms using Resilience4j, including circuit breakers, retries, and rate limiters, to build highly available and stable microservices. I am familiar with modern frameworks and technologies such as Micronaut, GraphQL (Query, Mutation, and Subscription), and reactive programming concepts. I consistently follow clean code principles, write unit tests using JUnit, maintain strong code coverage, and ensure high code quality with minimal Sonar violations. I am a proactive and dependable team player with strong analytical and problem-solving skills. I collaborate effectively with frontend developers, QA teams, and product owners to deliver reliable, maintainable, and business-focused solutions.