Usha L

Senior Java Full Stack Developer @ Citi

About

Senior Java Backend Developer with 10+ years of experience delivering and modernizing enterprise applications across finance, healthcare, and retail. Specialized in designing scalable, secure, high-performance backend systems and delivering end-to-end features across APIs, data layers, and responsive UIs.Currently building business-critical microservices for a financial services platform, developing Java 17 / Spring Boot services, REST and GraphQL APIs, enterprise integrations, and database performance optimizations. Strong background in distributed systems and event-driven architectures using Kafka/RabbitMQ/JMS and AWS messaging (SQS/SNS/Kinesis), with hands-on experience in legacy J2EE modernization.Experienced with cloud-native delivery on AWS/Azure, containerization (Docker/Kubernetes), and CI/CD automation (Jenkins, GitHub Actions, GitLab CI) using Terraform/CloudFormation. Comfortable with observability and production support (Datadog, Prometheus/Grafana, ELK, Splunk) and quality engineering (JUnit/Mockito/REST Assured/Cucumber). Front-end experience includes Angular + TypeScript and React concepts, working effectively in Agile teams with strong ownership and mentoring.

Country

City

United States

Industry

Computer Software

Skill

J2EE Web Services, Microservices & RESTful APIs, AWS + Docker/Kubernetes, Java 11, HTML, Apache Kafka, RabbitMQ, Spring Ribbon, Selenium, AWS, Amazon EC2, JPAS, RESTful WebServices, Angular 12/14, Express.js, GraphQL, Apollo, Microsoft Azure, YAML, Shell Scripting

Experience

Senior Java Full Stack Developer

Citi

2023-10 - Present · 3 yrs

*Designed and delivered financial domain microservices and APIs using Java 17, Spring Boot (MVC, Security, Cloud), Spring Data JPA/Hibernate, supporting high-volume processing. *Built REST + GraphQL APIs (resolvers/batch loaders, versioning) and implemented Spring Batch pipelines for large-scale data ingestion and processing. *Implemented secure authentication/authorization using OAuth2, OIDC, JWT, and role-based access control for sensitive data. *Developed event-driven workflows using Kafka (producers/consumers/streams) and integrated cloud services for downstream analytics. *Deployed cloud-native services using Docker + Kubernetes/OpenShift and AWS (ECS/EC2/Lambda/API Gateway/S3/IAM/CloudFormation) with CI/CD (Jenkins/Maven/SonarQube) and automated testing (JUnit 5/Cucumber). *Built and integrated enterprise solutions with Salesforce (Apex, LWC, Platform Events) and legacy modernization (J2EE/SQL Server integrations).

Senior Java Full Stack Developer

CVS Health

2021-11 - 2023-9 · 1 yr 11 mos

Boston, Massachusetts, United States

*Built and maintained Spring Boot microservices/REST APIs using Java 11, Spring MVC, Spring Data JPA, Hibernate. *Deployed containerized services on AWS (EC2, S3/CloudFront) using Docker + Jenkins, and supported deployments on Kubernetes/AKS. *Worked with Oracle/PostgreSQL and MongoDB/DynamoDB, including data migrations and performance-focused data access. *Implemented CI/CD and IaC using Jenkins, Terraform, CloudFormation; managed artifacts with Artifactory and deployments on Tomcat/JBoss. *Ensured quality and operability with JUnit/Mockito/Postman, plus logging/monitoring using Log4j and Datadog, working in Agile/Scrum with Git/Azure DevOps.

Senior Java Developer

Staples

2020-4 - 2021-10 · 1 yr 7 mos

San Ramon, California, United States

*Developed high-availability backend services for an e-commerce grocery platform (orders + customer accounts) using Java/J2EE and REST APIs. *Implemented asynchronous messaging using JMS and RabbitMQ to decouple order, payment, and inventory workflows. *Built and optimized data access using Oracle SQL/PLSQL and Hibernate caching, plus services with Node.js, MongoDB, and Redis. *Deployed containerized microservices to Azure AKS using Docker/Kubernetes and Terraform, with monitoring via Prometheus/Grafana. *Automated build/test/release pipelines using Jenkins/GitHub Actions/Maven and ensured quality with JUnit/Mockito/Postman (plus UI tests with Jasmine/Karma/Protractor).

Java Developer

Express Scripts Pharmacy Benefit Services

2018-1 - 2020-3 · 2 yrs 3 mos

St Louis, Missouri, United States

*Built and maintained PBM applications using Java 8, Spring, Spring Boot, and Hibernate, supporting high-volume transactions. *Developed secure Spring Boot microservices/REST APIs with Spring Security and optimized data access using DAO + HQL/JPA. *Worked on Oracle SQL/PL/SQL (procedures, triggers) and JDBC for backend/data-layer development. *Deployed services on AWS (EC2, Lambda, API Gateway) and supported monitoring/search with ELK (Elasticsearch, Kibana, Logstash). *Automated build and deployments using Jenkins CI/CD, version control with Git/GitHub, and followed Agile/Scrum using JIRA.

Software Developer

GlobalLogic

2014-8 - 2017-2 · 2 yrs 7 mos

India

*Built enterprise applications using Java and Spring (Spring MVC/Spring Boot). *Developed REST/SOAP integrations and handled JSON/XML data. *Implemented security (authentication/authorization, RBAC) using Spring Security. *Improved performance using Collections and multithreading. *Developed UI using JSP/JavaScript/jQuery/Ajax/HTML/CSS. *Supported delivery using Maven, Jenkins (CI/CD), Git, JUnit, JIRA, and Oracle SQL/PLSQL.