Involved in developing components on Reporting Dashboard with Spring MVC, Spring boot, Spring Framework and Hibernate. As a Big Data Developer i implemented solutions for ingesting data from various sources and processing the Data-at-Rest utilizing Big Data technologies such as Hadoop, MapReduce Frameworks, MongoDB, Hive, Oozie, Flume, Sqoop and Talend etc Configured Kafka to read and write messages from external programs. Worked on creating the micro service for Inventory Price Changes that took continuous stream of price updates for products with different PLUs by region, state and store type and pushed the changes to corresponding downstream systems. Worked as part of Micro-services team to develop and deliver Maven projects to deploy on Tomcat. Developed Restful endpoints for UI and other services to consume. Documented and rendered API’s using Swagger for QA and BA teams to view. Involved in developing JUNIT Test Cases to validate the type of data in the XML Files. Used Log4J for logging and tracing the messages. Hands on experience on REST based web services using JAX-RS library. Customized Restful Web Service using Spring Restful API, sending JSON format data packets between front-end and middle-tier controller. Used Maven tool to build and packaged, deploy an application project, and integrated with Jenkins. Implemented modules using Core Java APIs, Java collection, Java 8(Streams), multi-threading, and object-oriented designs.

Experience on modifying the existing Backend code for different level of enhancements. Developed Merge jobs in Python to extract and load data into MySQL database Involved in J2EE patterns MVC, Dependency Injection (DI), Inversion of Control (IOC), Data Access Object (DAO), Business Delegate, Service Locator and Singleton for the enterprise Java based application. Worked in designing and implementation of Microservice based applications using Java 8, JDBC, SP, HTML5, Spring Boot 2.x, Angular 8.0, Servlets with Eclipse. Developed test cases and performed unit testing using JUNIT. Developed different JavaBeans and helper classes to support Server-Side programs. Experienced in the architecture, design and development of high traffic application built in Java/J2EE using MVC architecture integrating spring, Hibernate and Struts frameworks in SOA. Used spring as an application framework to build the Services layer and implemented its core modules such as Spring Core Container, Inversion of Control, Data Access and MVC and Used XML/java /annotation spring boot configurations. Implemented ORM (Object Relational Mapping) framework with Hibernate for mapping Java classes and database tables. Designing and developing the Spring –boot REST services to push data to PostgreSQL, save logs to AWS S3, validated and authorized other REST services Rewrite existing Java application in Python module to deliver certain format of data Developed Merge jobs in Python to extract and load data into MySQL database Used Couchbase Python SDK to build applications that use Couchbase Server. Designing and implementing scalable, Restful, and micro services-based mobile back-end. The back end is written in Java using Spring Boot for simplicity and scalability.

Used Hibernate as the ORM tool to communicate with the database Involved in building database Model, APIs and Views utilizing Python, in order to build an interactive web based solution Involved in writing Java API for AWS Lambda to manage some of the AWS Created Angular8 Directives, Components, Pipes, Injectable across the whole system, such as to build the custom filter. Designed and Developed persistence layer with Hibernate, jQuery. Written jQuery Validations for the User Front ends. Worked with JSON objects and JavaScript and jQuery intensively to create interactive web pages. Implemented JSF framework in the application which is based on MVC design architecture. Implemented CSS3, DOM Api, DOJO and Ajax to create a dynamic and interactive experience. Created various UI components for different web pages using HTML, JavaScript, ExtJs. Used AJAX Asynchronous JavaScript and XML to implement user friendly and efficient client iterfaces frontend. Developed entire frontend and backend modules using Python on Django Web Framework Implemented and maintained AJAX based rich client for improved customer experience, Designed Front-end using JSP, Servlets, HTML, AJAX, CSS, and JavaScript. Designed the web user interfaces for all the above use cases using JSP, Struts, HTML5, jQuery, XML and Ajax. Created Node.js middleware application server to encapsulate modern JS widget framework and control set. Involved in building Lambda functions in AWS, to replace the Elastic bean for better performance and efficiency Used AWS WAF for making the Web application on Cloud Secure. Developed a fully functional prototype application

Involved in complete Life Cycle of the project starting from design to Testing the application Practiced Agile Methodology to keep track of the workflow tasks for every Sprint Developed application modules using Spring MVC, Spring Annotations, Spring Beans, Dependency Injection and Spring AOP, with database interface using Hibernate Implemented the application using Spring Boot Framework and handled the security using spring security Extensive experience in AWS Cloud and Its Components like EC2, S3, Lambda, Auto Scaling, Elastic Search, Cloud Watch and Cloud Formation Designed and developed web tier components and restful APIs using Spring MVC 3.0 Implemented Spring Bean Factory to create proxy object using AOP Framework Used Hibernate as an ORM mapping tool and worked with Hibernate Query Language (HQL) Defined the Hibernate Configuration File, Hibernate Mapping using annotation and created classes to persist the data Created client-side validation tool using Angular, React JS and JavaScript Involved in implementation of enterprise integration with Web Services and Legacy Systems using REST and Soap Web service Produced and consumed the web services data in the form of JSON, XML Have designed and built the new breed of Microservices for the client using Spring boot Developed classes using core java (multithreading, concurrency, collections, memory management) and some spring IOC Extensively worked on writing JUnit test cases for testing the business components developed in Spring and Java Extensive experience in AWS Cloud and Its Components like EC2, S3, Lambda, Auto Scaling, Elastic Search, Cloud Watch and Cloud Formation Expertise in distributed, secure and scalable application development using J2EE Technologies like Servlets, JDBC, JSP, Struts, Spring IOC, Spring MVC, Amazon Web Services (AWS), Web Services development (SOAP and RESTful