Joshuva Kirubhakar

My role and responsibilities at Citibank include:

• Developing RESTful web services for liquidity-based and trade-based applications in the Trade and Treasury (TTS) division using Java (8, 11, 17, 21) and Spring Boot (2.x and 3.x).
• *Designing and implementing high-performance APIs with concurrency features to reduce response times and improve system throughput.
• Migrating internal TIBCO tools to Java-based SOAP and REST APIs, resulting in significant performance improvements and reduced TIBCO license usage.
• Optimizing Trade and Liquidity APIs to improve response times and enhance system reliability.
• Writing complex SQL queries and stored procedures using Oracle DB to support core business logic.
• Supporting data operations and integration using Couchbase and Impala for various application needs.
• Building internal tools and APIs using Flask to streamline processes and increase team productivity.
• Collaborating with cross-functional teams, including Trade, Liquidity, and R&D, to deliver tailored technical solutions.
• Serving as a team player and mentor, guiding junior developers through code reviews and technical enhancements.
• Performing deployments using OpenShift through CI/CD pipelines configured with Jenkins and uDeploy, or using Lightspeed Tekton and Harness for modern DevOps workflows.
• Worked on Agile SDLC and with JIRA for work tracking.

• Specialized in microservices development, contributing to high-impact, enterprise-level projects for TransUnion CIBIL (Credit Bureau).
• Designed and developed scalable microservices using Java 11+ and Spring Boot(2.x and 3.x), focusing on gRPC and RESTful web services for low-latency, distributed system communication.
• Participated in the complete software development lifecycle: requirement analysis, design, implementation, testing, deployment, and maintenance of both backend services and frontend components.
• Migrated backend systems from Informix to PostgreSQL, resulting in significantly improved performance and response times.
• Gained hands-on experience with multiple databases:
• PostgreSQL – for structured relational data storage.
• Redis – for in-memory caching and high-speed key-value access.
• Informix – for handling legacy enterprise data systems.
• Implemented Apache Kafka-based event-driven architecture, including developing Kafka producer and consumer modules integrated with Spring Boot REST APIs.
• Worked on Kafka-based projects for real-time data streaming and processing.
• Diagnosed and resolved code vulnerabilities flagged by static analysis tools like Black Duck, Checkmarx, and SonarQube, ensuring secure and compliant code delivery.
• Collaborated in an agile team environment to deliver high-performance software solutions under tight deadlines.
• Achieved AWS Certified Cloud Practitioner certification, demonstrating foundational cloud computing knowledge.

• Developed and maintained end-to-end Java/J2EE applications for a major British telecom client.
• Designed and implemented business logic using EJB and Spring Framework.
• * Integrated Hibernate and JPA for efficient ORM and database interactions.
• Managed version control and collaboration using Git.
• Created and deployed containers using Docker; managed workloads using Kubernetes.
• Configured and maintained CI/CD pipelines with Jenkins and code quality checks using SonarQube.
• Handled relational and NoSQL databases, including MySQL, Oracle, and MongoDB.
• Contributed to cloud migration tasks involving AWS, Azure, and IBM Cloud environments.
• Wrote automation scripts and utilities using various scripting languages and frameworks.
• Delivered timely support and enhancements based on client feedback and business needs.