Sai Leela  – Senior Full Stack Application Engineer–  11+ years Exp – J2 EAD –  Willing to go onsite from Day 1

Sai Leela's Resume

 

Professional Summary:

• Over 11+ years of extensive development experience in an environment building n-tier applications for web deployment using Java, J2EE, Spring Framework, Spring MVC, Spring Boot, Hibernate and Web Services.

• Experience in developing web applications using JSP, Spring Boot, Kotlin, Spring MVC Frameworks, EJB, Hibernate, Spring Security, JBOSS, JDBC, Java Server Pages, Servlet, Web Services, JavaScript, JavaBeans  
• Experience with Version Control Systems like Subversion (SVN), Git, and VSS. 

• Proficient in developing the application by implementing the Object-Oriented Principles and Core Java Concepts like Collections, Exception Handling and Multi-threading.
• Experience leveraging AI tools like ChatGPT and GitHub Copilot for code optimization, debugging, and productivity improvement
• Basic exposure to integrating AI/LLM APIs into applications
• Hands on experience with Java features like Lambda expressions and Stream API for Bulk data operations on Collections which would increase the performance of the Application.
• 5+ years of experience in Production Support, including incident management, root cause analysis, and on-call support for critical applications.
• Strong experience in monitoring tools like Splunk, with exposure to alerting and log analysis for proactive issue detection.
• Expertise in building cloud-native applications using AWS serverless architecture and microservices
• Hands-on experience with Infrastructure as Code (Terraform) and event-driven systems
• Strong experience in CI/CD, DevOps practices, and production support environments
• Experience in designing scalable, high-performance distributed systems
• Expertise in troubleshooting production issues, performance tuning, and ensuring high availability of enterprise applications.
• Integrated React front-end applications with Spring Boot microservices.
• Proficient in developing the enterprise application with Servlets, Struts, Spring Framework modules like Spring IOC, Spring MVC (Model View Controller), Spring AOP, Spring Boot, Spring Security, Spring Data, Spring Integration and ORM Frameworks like Hibernate.
• Experience in Analysis, Design, Development, Implementation and Maintenance of applications using Java/J2EE Technologies like Servlets, JSPs, Hibernate, Spring DI, Struts and JPA with knowledge of SDLC concepts.
• Excellent experience in developing RESTful Services and SOAP based Web Services.
• Good Knowledge and hands-on experience in Angular and Typescript.
• Expertise in developing SOAP based Web Services with WSDL, UDDI, XML, JAX-WS, JAXB, JAX-RPC and Apache Axis.
• Expertise in XML technologies such as XSL, XSLT, XML schemas, XPath, XForms, XSL-FO and parsers like SAX and DOM.
• Experienced in building AI-assisted and Agentic workflow-driven applications integrating LLMs, automation pipelines, and intelligent orchestration systems.
• Built Agentic AI platform integrating LLMs, AI agents, and enterprise workflows.
• Solid understanding of Service Oriented Architecture (SOA) and Micro Services Architecture.
• Hands on experience in migrating existing Java applications in AWS cloud and worked on performance and cost-efficient solutions in AWS cloud to suit application specific needs.
• Experience in working with Amazon Web Services Elastic Bean Stalk like EC2, SQS, S3, Lambda, Elastic Search, Dynamo DB, Elastic Load Balancer (ELB) and Docker Container.
• Experience in developing cloud-based application using Amazon Web Services, Pivotal Cloud Foundry and Spring Cloud.
• Good understanding on Migrating applications to Google Cloud Platform, Off site disaster recovery and archival with Google Cloud Platform, Hybrid architectures and multi cloud deployments.
• Experience in Design, support and maintain the Splunk infrastructure in a highly available configuration.
• Strong MySQL and MongoDB administration skills in Unix, Linux and Windows.
• Experience using Hibernate for mapping Java classes with database and using Criteria API and Hibernate Query Language (HQL).
• Experienced with SQL ORACLE, MongoDB, HTML/CSS, Java and JavaScript, JDBC, JNDI, JMS, Hibernate, xml, Unix/Linux, Maven, Git, SPA, Node.js, Postgre SQL, Taglibs
• Experienced in developing front end applications using HTML5, XHTML, DHTML, CSS2/3(using SASS and LESS), Bootstrap, Angular JS, Angular and developing dynamic web pages and implementing React JS with Redux and Flux patterns to attain MVC functionality.
• Experience in development, deployment and troubleshooting Web based and enterprise-based applications on Windows, UNIX and Linux platforms.
• Hands on experience with build tools like ANT, Maven and Gradle.
• Extensive experience in using different IDE's like Spring Tool Suite, RAD, Eclipse and IntelliJ.
• Experience in using various version control tools like Visual Source Safe, IBM Clear Case, SVN, CVS and Git.
• Experience as a Production Support and technical support for complex/ critical applications and coordinated with other teams to resolve end-user issues promptly.
• Have knowledge about Scala and alternative JVM application development environments like Java and Kotlin

    TECHNICAL SKILLS:

    PROFESSIONAL EXPERIENCE:

Senior Full Stack Application Engineer
Hyundai Auto Ever America, Fountain Valley, California | Nov 2025 – Present

Responsibilities:

• Developed and enhanced the VINSearch application to enable efficient vehicle data retrieval and validation using VIN (Vehicle Identification Number).
• Built scalable full stack solutions using Java, React, and Node.js, delivering responsive and high-performance applications.
• Designed and implemented RESTful APIs and microservices with Springboot architecture for secure, reliable, and distributed systems.
• Deployed and maintained applications on AWS using Docker and CI/CD pipelines with GitLab, improving release efficiency and system stability.
• Provided L2/L3 production support for critical applications, handling incidents, outages, and on-call support
• Monitored applications using Splunk and log analysis tools to proactively identify issues
• Performed root cause analysis (RCA) for production defects and implemented preventive measures
• Troubleshot and resolved performance issues, including database query optimization
• Managed production deployments, hotfix releases, and rollback procedures
• Built AI-assisted workflow automation solutions integrating OpenAI APIs and intelligent orchestration systems.
• Developed Agentic AI workflow prototypes for automating business operations and user interactions.
• Utilized GitHub Copilot and AI-assisted tools to accelerate development and improve code quality
• Leveraged ChatGPT/OpenAI tools for debugging, code optimization, and generating reusable components
• Explored integration of OpenAI APIs to enhance application features and automate workflows
• Used AI tools for log analysis, troubleshooting, and faster root cause identification in production support
• Designed and implemented serverless architectures using AWS Lambda, API Gateway, and EventBridge
• Provisioned cloud infrastructure using Terraform (Infrastructure as Code)
• Provided L2/L3 production support for enterprise Java applications and React-based front-end systems.
• Supported Java Spring Boot microservices and React.js applications deployed in cloud environments.
• Worked on AI-assisted automation tools and intelligent workflow integrations.
• Built event-driven microservices using Kafka and AWS messaging services
• Deployed containerized applications using Docker and Kubernetes (EKS/ECS)
• Improved system reliability through monitoring, alerting, and proactive issue resolution
• Designed serverless architectures using AWS Lambda, API Gateway, and SQS
• Implemented Infrastructure as Code using Terraform for cloud resource provisioning
• Built event-driven systems using Kafka and AWS messaging services
• Explored integration of AI/LLM APIs for enhancing application capabilities
• Worked with AWS services including API Gateway, CloudFront, and EventBridge
• Deployed applications using AWS EKS/ECS and container orchestration
• Worked with cross-functional teams to resolve customer-reported issues within SLA timelines
• Supported UAT and production validation activities
• Maintained support documentation and knowledge base for recurring issues
• Managed and optimized database operations using OracleDB and PostgreSQL.
• Accessed Big Data Platform Elastic Search Index in backend.
• Worked in Agile/Scrum environments, actively participating in sprint planning, daily stand-ups, and retrospectives.
• Collaborated closely with business stakeholders to gather requirements, translate them into technical solutions, and ensure alignment with business goals.
• Participated in operations review meetings to monitor system performance, address production issues, and implement continuous improvements.
• Conducted code reviews, debugging, and troubleshooting to maintain high-quality and reliable software delivery.
• Automation Testing with Selenium.
• Version Control using GitLab
• Agile Methodology throughout the application using Jira
• Used Eclipse IDE and Visual Studio Code for the development.

 

Senior Full Stack Developer – Financial Corporation

June 2022 – April2025

Responsibilities:

• Driving the technical design of the application by collecting requirements from the Functional Unit in the design phase of SDLC.
• Worked with database migration (Graph DB to Cassandra DB)
• Developed the framework based on Spring MVC Architecture with Spring Dependency Injection.
• Creating requirement documents and design the requirement using UML diagrams, Class diagrams, Use Case diagrams for new enhancements.
• Built backend systems to manage order financials, billing, and refunds, ensuring accuracy and auditability.
• Developed dynamic and responsive React JS front-end components integrated with Spring Boot-based REST APIs for order and billing systems
• Developed responsive UI applications using React.js, JavaScript, and Bootstrap.
• Deployed and managed applications on OpenShift Container Platform (OCP)
• Worked on backend integration tasks involving Java Native Interface (JNI) to interface with existing C/C++ components for low-latency billing systems.
• Developed the Application Module using several design patterns like Singleton, Factory, DAO, DTO, Business Delegate, Composite View and MVC.
• Developed applications using Kotlin for backend and Android-based solutions.
• Used Kotlin’s concise syntax and null safety features to write cleaner and more reliable code.
• Involved in integrating APIs, managing data flows, and implementing business logic using Kotlin.
• Collaborated with team members to migrate Java codebases into Kotlin, improving readability and reducing boilerplate code.
• Kotlin’s coroutines and asynchronous programming support helped us to build efficient, responsive applications.
• Used JBoss application server deployment of applications.
• Developed communication among SOA services using XML schema.
• Designed the user interface of the application using HTML5, CSS3, React JS, jQuery, AJAX and Node JS.
• Set up the Web-driver-IO test cases for the application to generate snapshots of the UI
• Implemented a metrics collection mechanism for the server by utilizing Apache Kafka to stream server-side events.
• Integrated microservices with payment gateways and financial reconciliation systems.
• Involved in design, development, testing and implementation of the process systems, working on iterative life cycles business requirements, and creating Detail Design Document.
• Using agile methodologies to plan work for every iteration and used continuous integration tool to make the build passes before deploying the code to other environments.
• Web application development for backend using ReactJs with cutting edge HTML and CSS3 techniques.
• Implemented Single Page Applications (SPA) using React JS and Redux, enhancing performance and user experience.
• Participated in performance tuning discussions for C++ services supporting order reconciliation, contributing to cross-language troubleshooting.
• Designed and implemented serverless components in Kotlin using AWS Lambda for real-time eCommerce event processing.
• Implemented Single Page Design and customized directive and filter criteria by using React JS.
• Modified existing applications to a suite of micro services and all micro services to facilitate deployment using Spring Boot and Junit and Power Mock frameworks for unit testing.
• Developed code for Responsive web design in JavaScript using ReactJs.
• Involved in daily SCRUM meetings to keep track of the project status.
• Developed various single page applications (SPA) using ReactJs and used various predefined components from NPM (Node Package Manager) and redux library.
• Deployed Docker contained spring boot Micro services in to AWS EC2 container service using AWS admin console and used lambda to run applications in AWS console.
• Used Nodejs to run Grunt tasks and build properly the project (compile, minify, concat etc.) 
• Implement modules into Node JS to integrate with designs and requirements. 
• Used Spring Boot which is radically faster in building cloud Micro services and develop Spring based application with very less configuration.
• Used Webpack to bundle TypeScript and JavaScript modules.
• Used Hibernate Persistence Strategy to interact with database.
• Implemented React services for connectivity between web applications and backend API's using Typescript.
• Built single-page applications (SPAs) using React JS with Redux to manage state for dynamic order and logistics management systems.
• Utilized Kotlin to write clean, testable REST APIs for backend services supporting inventory and logistics workflows.
• Used DAO pattern to retrieve the data from database.
• Worked with Session Factory, ORM mapping, Transactions and HQL in Hibernate framework.
• Implemented a security module in AngularJS which integrated with the Spring security in the backend with Authentication and Authorization.
• Worked with the NoSQL Database Cassandra to manage extremely large data sets.
• Used Web Services for sending and getting data from different applications using Restful.
• Wrote client side and server-side validations using Struts Validators and Java Scripts Validations.
• Created and managed development and continuous integration environments automated through Jenkins using Perl Script. 
• Configured maven profiles and Jenkins jobs to enable deployments to Pivotal Cloud Foundry PaaS environments.
• Writing stored procedures, complex SQL queries for backend operations with the database.
• Followed Agile Methodology (SCRUM) to satisfy the customers and wrote Junit test cases for unit testing the integration layer.
• Experience in Designing, Architecting and implementing scalable cloud-based web applications using AWS.
• Develop the Shell scripts to automate the data configuration and data transfer between different environments.
• Devised logging mechanism using Log4j. 
• Creating tracking sheet for tasks and timely report generation for tasks progress.
• Code review, review its effectiveness, defect tracking, defect solving.
• Analyzing bugs, production problem and assigning it to offshore team members.

 

Environment: Java, J2EE, Core Java, Multithreading, HTML5, TypeScript, CSS3, JDBC, JSP, Shell script, ReactJS, Redux, Node JS, AWS, UML, Micro services, Spring Framework, Hibernate, Kafka, Cassandra, OCP, NoSQL, Spring Boot, XML, Maven, Jenkins, Perl, Oracle 11g, JBoss, SDLC methodologies, Log4j, Splunk, Rational Application Developer, JUnit, GIT, Restful, Eclipse IDE.

 

Project Engineer –Java/Full Stack – Centre for Development of Advanced Computing (CDAC)

Kochi, India | Jan 2014 – May 2022

Responsibilities:

• Developed UI application initially using Angular and made use of customized components.
• Implemented customer side validations using Angular and created services on UI for storing and retrieving data from UI to the backend.
• Migrated legacy Angular components to React JS, improving performance and code maintainability.
• Developed Kotlin-based microservices to streamline financial operations, enabling rapid backend processing.
• Supported C++ backend processes related to travel booking engines and coordinated data flow between C++ services and Java/React applications.
• Was under migration of the project converting angular components and updating router Modules.
• Developed key services for authorization and authentication in Node server, where we used LDAP. Later migrated the authentication from LDAP to Ping Access-SSO (Single Sign On) Application.
• Refactored existing Java services into Kotlin-based microservices, improving developer productivity and application scalability.
• Developed secure APIs for payment capture, refund authorization, and fraud prevention in travel booking systems.
• Migrated existing Angular modules to React JS to modernize the UI layer of the travel booking and policy engine.
• Created sessions for Login user and setting session timed out for the entire UI application.
• Strong understanding on client-side application and very good at attaining the architectural design for MVC using directives, promises and pipes.
• Implementation of the design wireframe using Angular and creating services and exposing it to the backend which runs on Spring Boot. Here we also have another layer that makes use of NodeJS mainly used for authentication, authorization and session maintenance.
• Ran Log aggregations, website Activity tracking and commit log for distributed system using Apache Kafka.
• Gained familiarity with POSIX-compliant C++ services running in Linux containers, used for high-speed booking calculations.
• Involved in innovation of the current UI to make an implementation under mobile device access using cross platform technologies such as Ionic which helps in improving the business.
• Involve in development, design and implementation of the front-end application using HTML5, CSS3, AJAX, Bootstrap.
• Made use of Reactive Forms using Angular where most of the validation is done using component rather than using template-driven which provides in HTML.
• Mainly involved in deployment activities CI/CD deployment and familiar with OSE (Open shift origin). Also made changes in Jenkins Files as per the requirement of the pipeline.
• Involved in web services design and development. Responsible for creating and consuming web services using REST and XML.
• Implemented JavaEE components using Spring MVC, Spring IOC, Spring transactions and Spring security modules.
• Enhanced system stability by leveraging Kotlin’s type-safe builders and sealed classes in API design.
• Implemented transaction management using Spring AOP and used Spring Aspects for implementing logging functionalities.
• Worked in integrating JMS with SPRING BOOT by providing an instance which is embed with Active MQ.
• Contributed to test harnesses and mocking C++ APIs for validation within Java-based functional test suites.
• Node Package Manager (NPM) was used to list out the right versions of the packages and their dependencies for the project.
• Integrated third-party financial APIs for currency conversion and VAT calculations.
• Worked on a project which handles searching algorithms using Elastic Search which is mainly used for pulling analytics related information using the keywords entered by the end user.
• Authenticating Users and to provide the security to RESTful web services using OAUTH 2.0.
• Integrated the ORM Object Relational Mapping tool hibernate to the spring using Spring ORM in our app and used spring transaction API for database related transactions.
• Configured JPA to use Hibernate as ORM tool.
• Extensively used Spring IOC configured Application Context files and performed database object mapping using Hibernate annotations.
• Implemented Spring Validators, persistence layer, and service layer components using Spring/Hibernate API and Spring/Hibernate annotations. Extensively used Hibernate QL.
• Created persistence layer using Hibernate for sending and retrieving data from the database.
• Developed test cases for each component in different panels using Junit, reported and deployed using Jenkins.
• Worked with Jenkins Continuous Integration and Continuous Deployment (CI/CD).
• Designed and developed the framework to consume web services hosted in Amazon EC2 instances.
• Integrated Kotlin services with Spring Boot and PostgreSQL, improving maintainability and performance of trading APIs.
• Building cloud Micro services and implemented back-end using Spring Boot. And Authored application using Spring Cloud services.
• Verified data integrity on Apache Cassandra cluster while batch loading.
• Used Apache Kafka in cluster as messaging system between APIs and micro services and worked on Splunk, SPL (Search process language) queries, reports and logging using Log4j.
• Used Docker Container to address every application across the hybrid cloud and Docker for better collaboration and innovation.
• Designed, configured and deployed Amazon Web Services (AWS) for a multitude of applications utilizing the AWS stack (Including EC2, S3), focusing on high-availability, fault tolerance, and auto-scaling.

 

Environment: Java, JavaScript, HTML5, Angular, CSS3-LESS, AJAX, Bootstrap, jQuery, Spring Security, Rabbit MQ, Node JS, Express JS, HTML5, Bootstrap, Site Minder, Hibernate4.x, OIDC, Jenkins, Log4j, MongoDB, Mongoose Connector, Oracle, JBoss, Elastic search, EBS, Elastic Load Balancer, Docker, Apache tomcat, Mockito, Junit, mock MVC, Kubernetes.

Kushal Desai