• Designed and developed Web Application based on Multi-Tier Architecture using the current most popular web technologies like HTML5, CSS3, JavaScript and RESTful Web Services.• Defined resource URI structure and a message format to interact Ext.js client application with Play Framework server application using REST and JSON and worked in continuous integration using Jenkins for timely builds, code coverage, running test as well as developed a batch processing system with REST based APIs, using Spring Batch 3.0, integrated with Quartz scheduling.• Configured Spark Streaming to receive real time data from the Apache Kafka and store the stream data to HDFS using Scala as well as Implemented Spark using Scala and utilizing Data frames and Spark SQL API for faster processing of data.• Worked on developing Restful endpoints to Cache application specific data in in-memory data clusters like Redis and exposed them with Restful endpoints by using Redis Cache as well as wrote Express.js and used MongoDB for persistence and Redis for caching.• Designed and deployed infrastructure using AWS solutions like CloudFormation, ECS, EC2, S3, EBS, ALB, Auto scaling, Route53, CloudWatch.• Wrote lightweight Angular.js, Node.js express server, using technologies such as Ajax, JavaScript/jQuery, JSON to make connections between server and NoSQL databases and involved in analysis, and design of the application in a team-environment using Python Django framework, MySQL for backend and TypeScript and Angular for front-end development.• Setting up Database infrastructure (RDS, REDSHIFT and DYNAMO DB) and AWS RDS (AZ-Failover and Read Replicas and done application deployment and data migration on AWS Redshift.• Worked on core AWS services such as Setting up new server (EC2) instances/services in AWS, configuring security groups, and setting up Elastic IP's, auto-scaling configuration, and Cloud Formation.

• Used core Java/J2EE components for tuning the application compatible with the new application server configuration and used Maven tool to build project and JUnit to develop unit test cases.• Researched JBPM process- engine, toward implementation of personnel flow-control system and involved in developing front-end screens using JSP, Struts View Tags, Bootstrap, JSTL, DHTML, CSS3 and JavaScript, and jQuery.• Involved in writing Thread Safe blocks for multithread access to make valid transactions as well as migrated test and use cases for applications to AWS cloud with public and private IP ranges to accelerate development productivity by decreasing test-run times.• Developed Spring boot application with microservices and deployed it into AWS using EC2 instances while using Microservices architecture, with Spring Boot based services interacting through a combination of REST and Spring Boot.• Provided knowledge transfer to other teams on MongoDB technology & tools as well as helped other teams in troubleshooting and fixing MongoDB issues.• Involved in troubleshooting of Front Endissues with the div base layout and Involved to implement various screens for the front end using REACTJS and used various predefined components from NPM (Node Package Manager) and REDUX library.• Extensively worked on Entity beans in the persistence layer, interaction with Oracle 11g DB and worked with high volume and complex PL/SQL stored procedures and packages using Oracle SQL• Involved in Analysis, design and coding on J2EE Environment as well as implemented MVC architecture using Struts, JSP, and EJB's and worked on Hibernate object/relational mapping according to database schema.• Used Core java concepts in application such as Multithreaded Programming, Synchronization of threads used thread Wait, Notify, Join methods etc.

• Developed various APIs to be consumed by other modules of the application using RESTful web services and Used Junit framework for unit testing of application and Log4j to capture the logs.• Implemented databinding using Node JS for front-end development of a current web application as well as involved in implementing a RESTful API server with Nodejs, Express and fetch queries for client and accountant relationship from Mongo DB.• Developed Mongo DB embedded documents from java code using spring data MongoDB as well as developed enhancements to MongoDB architecture to improve performance and scalability.• Heavily involved in Spring Framework, including IoC, AOP, DAO Support/ ORM, Spring MVC, Spring Security, Spring Integration, and Spring Cache.• Setup on “IoT Protocol translator” server by sending request (GET method) using HTTP and receiving response (POST method) using HTTP from “IoT Protocol translator” server.• Used jQuery to make the HTML, DHTML, Angular JS and CSS to interact with the JavaScript functions to add dynamics to the web pages at the client side and worked on to improve the look and feel of the web application based on user feedback using CSS, HTMLand JavaScript, Gulp.• Managed and monitored several applications that run-on AWS (Auto Scaling) to ensure delivery of optimized IAAS using Cloud Formation template and done performance tuning and query optimization in AWS Redshift.• Managed the SSO administration, testing and troubleshooting in development, staging and production environments as well as deployed Spring Boot based microservices in Docker and Amazon EC2 container using Jenkins and worked in securing microservices with the public and private key cryptography.• Implemented OAuth to access the protected API with Access Token by using Different Oauth Grant types.• Develop Responsive Html web pages using HTML5, CSS3, jQuery, JavaScript, Bootstrap, webpack and extensively used ES6 to create components in React.