Java Developer Software Development

NAME: Sashvathi S

Sr. Full Stack Java Developer

Email: ad5dss@r.postjobfree.com

Contact: 724-***-****

LinkedIn: Sashvathi S

PROFESSIONAL EXPERIENCE

Around 9+ years of experience in all the technical phases of Software Development Life Cycle (SDLC) including Requirement Analysis, Design, Implementation and Testing in both Web based and Enterprise applications with emphasis on Object Oriented, Java/J2EE and Client Server technologies.

Experience in developing the application with Agile Methodology, Waterfall Methodology and Test-Driven Development.

Good knowledge on Python Scripting and Linux Shell Scripting.

Developed Linux Shell scripts, Python scripts and SQL control files to load data through SQL Loader & Oracle data pump.

Experience in Front-End UI technologies like HTML5, CSS3, jQuery, JSON, Ajax, AngularJS, NodeJS, Bootstrap, Tag Libraries and JSTL.

Good working knowledge with Java 1.8 and implemented its features like Lambdas Expressions, Time API, Streams, functional interfaces, Collectors, default methods, type interfaces, foreach.

Hands on Experience in developing web applications by using Spring framework modules like Spring IOC, Spring AOP, Spring MVC, Spring Security, Spring Boot, Spring Batch and Spring Data.

Expertise in developing data models using Hibernate Object relational mapping (ORM) framework and used Hibernate Annotations to reduce time at the configuration level

Having experience with Cloud Computing environments like Pivotal Cloud Foundry, Amazon Web Services (AWS), and Docker Containers.

Handled operations and maintenance support for AWS cloud resources which includes launching, maintaining and troubleshooting EC2 instances, S3 buckets, Auto Scaling, DynamoDB, AWS IAM, Elastic Load Balancers (ELB) and Relational Database Services (RDS).

Proficient in developing J2EE enterprise applications in Service Oriented Architecture and Micro Service Architecture.

Expert in Core Java with strong understanding of Garbage Collector, Collections, Multithreading, Event handling, Exception handling and Generics.

Expertise in J2EE Technology- Servlets, Struts, Spring, JDBC, JTA, JPA, Hibernate and JMS.

Experience with distinctive design patterns like Singleton, Factory, Prototype, Business Delegate, Session Facade, Service locator, Visitor, Observer, Decorator, Front Controller, DAO and MVC.

Worked with design and development of robust and highly scalable Web Service platforms and APIs based on REST and SOAP for enterprise applications using AXIS, WSDL, UDDI, XML, JAX-WS, JAX-RS, JAXB, JAX-RPC technologies and Jersey frameworks.

Expertise in XML technologies such as XSL, XSLT, XML schemas, XPath, XForms, XSL-FO and parsers like SAX, DOM.

Expertise in back-end/server-side java technologies such as: Web services, Java persistence API (JPA), Java Messaging Service (JMS), Java Database Connectivity (JDBC) and Java Naming and Directory Interface (JNDI).

Used Apache Kafka for integration and Data Processing with spring and for Multi-Threaded Message Consumption and worked on Zookeeper to maintain services.

Experienced in building Web Services for Service Oriented Architecture (SOA).

Good Understanding in databases such as Oracle, MySQL, SQL Server, IBM DB2 and MongoDB databases to manage tables, views, indexes, sequences, stored procedures, functions, triggers and packages

Experience in JMS over messaging to exchange the information more reliably and asynchronously for enterprise applications using Active MQ, RabbitMQ and Kafka as message queue.

Proficient with build automation tools like Gradle, Maven and Ant for builds and deployments to different environments.

Experience on different IDEs such as Eclipse, RAD, Spring Tool Suite, IntelliJ and deployment using Application Servers like Apache Tomcat, BEA WebLogic, Web Sphere, Glassfish, Camel and JBOSS

Experience with JUnit, Mockito, Log4j in developing test cases and determining application functionality.

Experience on UNIX/LINUX Shell Scripting and Deployment of Applications in Server.

Decent Experience in using Kubernetes, GIT, Tortoise SVN, and Visual Source Safe.

Trained and staff on Kubernetes administration.

Strong communication and analytical skills and a demonstrated ability to handle multiple tasks as well as work independently or in a team.

TECHNICAL SKILLS:

Programming Languages

C, C++, Java 1.8, J2EE, Python and PL/SQL.

Tools and Framework

Struts, Spring, Hibernate, Spring MVC, Spring Web Flow, Spring IOC, Spring AOP, Spring Security, Struts, JSF, JUnit, SOAP UI, JReport, Kubernetes.

J2SE/J2EE Technologies

Java, J2EE, RMI, Sockets, JDBC, Servlets, JSP, JMS, Java Beans, JSTL, JSF, Jakarta Struts, EJB, Spring, Hibernate, JTA, JNDI, JPA JMS, Web Services (JAX-RPC, JAX-WS, SOAP, REST, WSDL, UDDI and RESTFUL), Groovy/Grails. Angular 8

Web Technologies

HTML5, CSS3, JavaScript, jQuery, Bootstrap, AngularJS, JSF, AJAX, NodeJS, JSON Restful.

XML Technologies

XML, XSL, DOM, SAX, DTD, XQuery, XSD and XSLT.

Cloud Technologies

AWS EC2, S3, DynamoDB, ELB

Databases

Oracle, SQL-Server, MySQL server, MS SQL, IBM DB2, Amazon, MongoDB, NoSQL.

Web/Application Servers

Apache Tomcat, IBM WebSphere, Web logic Application, JBOSS.

Build Tools

ANT, Maven, Gradle, Docker and Jenkins

IDE / Tools

Eclipse, IntelliJ, Spring Tool Suite (STS), RAD

Testing Tools/ Others

JUnit, Mockito, Soap UI, Log4j and JIRA

Version Control

Tortoise SVN, CVS and GIT

Platforms

Windows, Mac, Linux and Unix.

Methodologies

Agile, Waterfall, Test Driven Development

PROFESSIONAL EXPERIENCE:

Client: CNA Insurance, Chicago, IL Oct 2022 - present

Role: Full Stack Java Developer

Responsibilities:

Involved in design discussions and understanding of business requirements and identifying the relevant functional and technical requirements.

Application is implemented using Agile methodology where there is a daily SCRUM meeting to understand the status and resolve any issues.

Developed a Single page application and structured the JavaScript code using Angular 8.

Implemented the front end using HTML5, CSS3, Bootstrap, NodeJS and Angular 8.

Used JAVA 1.8 features like Lambda Expressions, Parallel Streams and functional interfaces.

Implemented a production ready. Load balanced, highly available. Fault tolerant Kubernetes infrastructure.

Created a private cloud using Kubernetes that supports DEV, TEST, and PROD environments.

Managed Kubernetes charts using a helm. Created reproducible builds of the Kubernetes applications, managed Kubernetes manifest files and managed release and helm packages.

Involved in building database Model, APIs and Views utilizing Python, in order to build an interactive web based solution.

Responsible for gathering requirements, system analysis, design, development, testing and deployment.

Worked on UI using HTML5, CSS3 and Java Scripts.

Created User Controls and simple animations using Java Script and Python.

Designed and implemented Model-View-View Model pattern for many components in the project (Contracts, Products, Search Sales, Employees, BackOffice Admin). Developed tools using Python, Shell scripting, XML to automate some of the menial tasks. Interfacing with supervisors, artists, systems administrators and production to ensure production deadlines are met.

Developed multi-threaded standalone app in Python, PHP, C++ to view Circuit parameters and performance.

Developed Python batch processors to consume and produce various feeds.

Developed entire frontend and backend modules using Python on Django Web Framework.

Developed Business Logic using Python on Django Web Framework.

Developed Merge jobs in Python to extract and load data into MySQL database.

Developed RESTful Web Services with JAX-RS using Spring Boot and Microservices Architecture.

Experienced on spring framework applications like Spring Core, Spring AOP, Spring MVC, Spring Batch, Spring Security and Spring Boot and did integration to Micro services into existing system architecture.

Implemented the authentication and authorization of the application using Spring Security and OAuth 2.0.

Implemented Micro Services Architecture to divide the application into various sub modules.

Involved in migrating monolithic applications in Micro Service Architecture and developed Micro services using the OpenShift platform built upon Spring Boot Services.

Worked with Spring Ribbon and Kafka broker service with Zookeeper to handle heavy traffic.

Developed integration modules for disparate clients using Apache Camel.

Worked on XML and JSON for transferring and retrieving data between different applications.

Used Spring JMS module for lookup for the queues and MDBs for the listeners.

Used Jasper Reports as a reporting tool to generate various reports in different formats like PDF, XLS, CSV, HTML.

Established Database Connectivity using JDBC, Hibernate O/R mapping with Spring ORM for SQL.

Worked on Hibernate for mapping the java objects to relational database and SQL queries to fetch the data, insert and update the data from the database.

Writing Stored Procedures and JDBC prepared statements to retrieve the data from the database.

Experience in Test Driven Development (TDD) by identifying test case scenarios and unit testing the code using JUnit framework.

Collaborated with testers and developers and prepared test plans for producing high quality software applications.

Used Log Insight to monitor application logs, messages, network traces, configuration files and performance data in real time.

Worked on Amazon Web services (AWS) and worked on EC2, S3 and Lambda for a POC.

Worked on Active MQ to communicate with controllers and used a service layer to implement the business logic.

Worked on Log4j for logging errors, messages and performance logs.

Used GitHub as Version Control tool, JIRA for issue tracking (production issues at time) and Eclipse, IntelliJ, VS code as IDE.

Doing the POC for deploying the Services onto the OpenShift PODS and test end-to-end application.

Deployed and tested the application on Web Logic Application Server.

Support and maintain the CICD process & scripts to build and host angular SPA and Spring Boot applications using Atlassian tech stack (Git, Jenkins), Nexus, SonarQube and OpenShift Ecosystem – Plans, jobs, tasks etc.,

Environment: Agile Methodology, Java 1.8, J2EE, HTML5, CSS3, Ajax, Bootstrap, JavaScript, Angular 8, NodeJS, Hibernate, Spring MVC, Spring IOC, Spring boot, spring security, OAuth, XML, GIT, JSP, JUnit, Maven, WebLogic Application server, OpenShift, JAX-WS, Restful, Micro Services, Log4J, SQL, DB2, Docker, JIRA and Eclipse, IntelliJ, Log Insight, Jenkins.

Client: Change Healthcare, Nashville, TN Jun 2020– Sep 2022

Role: Full Stack Java Developer

Responsibilities:

Worked on High level and low-level system design, planning, estimation and implementation

Developed presentation layer using HTML5, CSS3 and client validation using JavaScript.

Developed a Single page application and structured the JavaScript code using AngularJS.

Design and develop template-based User Interface using Bootstrap and AngularJS.

Experience with NodeJS modules including Events, http, file system, MySQL. Wrote restful services on the server in NodeJS to listen to requests from devices.

Developed entire frontend and backend modules using Python on Django Web Framework.

Utilized PyQt to provide GUI for the user to create, modify and view reports based on client data. Designed and developed data management system using MySQL.

Rewrite existing Java application in Python module to deliver certain format of data

Wrote Python scripts to parse XML documents and load the data in database.

Generated property list for every application dynamically using Python.

Responsible for search engine optimization to improve the visibility of the website.

Handled all the client side validation using JavaScript.

Performed testing using Django's Test Module. Involved in AJAX driven application by invoking web services/API and parsing the JSON response.

Used Couchbase Python SDK to build applications that use Couchbase Server.

Utilized JAVA 1.8 features like Lambda expressions for collection, evaluation and comparing the data, Stream API for Bulk data operations on Collections which would increase the performance of the Application, Parallel operations on collections for effective sorting mechanisms and to change the sequential stream flow of threads while session establishment.

Excellent in deploying the applications in AWS as EC2 instances and creating snapshots for the data that must be stored in AWS S3.

Utilized Amazon Web Services (AWS) EC2 to deploy Docker containers.

Created and configured the continuous delivery pipelines for deploying Microservices and Lambda functions using Jenkins CI server.

Utilized Docker for the runtime environment of the CI/CD system to build, test and deploy the application.

Worked on development and implementation of the MVC Architectural pattern using Spring Framework.

Developed the application with various Spring Framework modules like Spring IOC, Spring AOP, Spring Boot, Spring Security, Spring Batch.

Used Spring MVC framework at the Web tier level to isolate each layer of the application so that complexity of integration will be reduced and maintenance will be very easy.

Used Spring AOP for solving crosscutting concerns like keeping customer log data and transactions details etc.

Implemented Batch jobs to deal with large number of chunks using Spring Batch Framework to execute the similar jobs simultaneously.

Designed and integrated the full-scale Hibernate persistence solution with the application architecture.

Involved in design and development of the Hibernate Domain Model for the service.

Involved in using JPA (Java Persistence API) frameworks and APIs as JDO and Hibernate.

Enterprises Integrated Pattern Implemented with Apache Camel (ESB).

Developed a RESTful based service for data retrieval to make it independent of the current application.

Involved in development of RESTful web services with JAX-RS using Spring Boot and Microservices Architecture.

Proficient in Application Development/Maintenance using Legacy RPI languages.

Involved in migrating monolithic applications in Micro Service Architecture and Developed Micro services using Pivotal Cloud Foundry platform built upon Spring Boot Services.

Worked on XML and JSON for transferring and retrieving data between different applications.

Wrote services to store and retrieve user data from MongoDB for the application on devices.

WebSphere is used as an Application Server to Deploy the Application.

Experience in using JUnit and building tools such as MAVEN.

Collaborated with testers and developers and prepared test plans for producing high quality software applications.

Used Log4j for logging errors, messages and performance logs.

Environment: Agile Methodology, Java 1.8, J2EE, HTML5, CSS3, Ajax, Bootstrap, JavaScript, AngularJS, NodeJS, Hibernate, Spring MVC, Spring IOC, Spring boot, spring security, OAuth, XML, AWS, GIT, JSP, JUnit, Maven, IBM WebSphere, Apache AXIS, JAX-WS, Restful, Micro Services, Log4J, Oracle, MongoDB, WSD, Docker, JIRA and Spring Tool Suite.

Client: T- Mobile, Bothell, WA Oct 2018 – May 2020

Role: Sr. Full Stack Developer

Responsibilities:

Developed REST APIs using Spring Boot applications and deployed the applications in the Z.

Assisting the Development Manager with all aspects of software design and coding.

Attending and contributing to company development meetings.

Monitoring the technical performance of internal systems.

Responding to requests from the development team.

Gathering information from consumers about program functionality.

Worked on integration layer of the application with Spring MVC in backend and Angular in front end.

Designed and develop a custom, single-page, responsive Web Application on the front end using Angular.JS

Develop and maintain efficient server-side code using Spring Boot framework with a focus on microservices and cloud-oriented deployment.

Designed and built Confidential highly scalable serverless micro-service known as the App Intake service, which uses the Lambda, DynamoDB, and API Gateway services from AWS for high-speed data ingestion.

Assess change proposals and define solutions to help the organization achieve its goals

Built Microservices built using spring boot, spring security and deployed to AWS cloud.

Work with the training team to document system scenarios and identify roles impacted to help develop a change management/training plan.

Create reports and share results with management and clients.

Actively participated in different phases of the Software Development Life Cycle (SDLC) and analyzed Use case diagrams and Class diagrams based on the requirement.

Also, been a part of Designing, Developing, documenting, and maintaining tools and Automation Frameworks part of an Agile team

Used Kafka as a messaging system and performed the validation jobs using Java visual VM.

Worked in the design, development, and implementation of web application technologies.

Actively involved in coding using Java 1.8, Used Java collection API extensively, such as Lists, Sets, and Maps.

Ensure that the design and development is conforming to best practices, standards, and technical design.

Took ownership of day-to-day issues and escalations and brought issues to resolution.

Environment: Java, HTML, CSS, AJAX, jQuery, JavaScript, JSON, XML, Struts, JDBC, IBATIS, Web Services, SOAP UI, Restful, HQL, SQL, JBOSS, Oracle, ANT, Eclipse IDE, JIRA, Tortoise SVN, and UNIX.

Client: Vision Infotech, Hyderabad, India Jul 2016 – Sep 2018

Role: Java/J2EE Developer

Responsibilities:

Involved in Requirement Analysis, Design, Development and Testing of the risk workflow system.

Involved in the implementation of design using vital phases of the Software development life cycle (SDLC) that includes Development, Testing, Implementation and Maintenance Support in WATERFALL methodology.

Created user-friendly GUI interface and Web pages using Struts, JSP, HTML, CSS, AJAX, jQuery and JavaScript.

Responsible for designing, coding, and developing the application in J2EE using Struts MVC.

Implemented Struts framework (Action & Controller classes) for dispatching requests to appropriate classes.

Used simple Struts Validation for validation of user input as per the business logic and initial data loading.

Achieved synchronization of multiple threads through Multithreading and Exception Handling.

Extensively used JSON to parse the data from server side to satisfy the business requirement.

Developed Struts Action Forms, Action classes and performed action mapping using Struts.

Developed batch jobs using EJB scheduling and leveraged container managed transactions for highly transactions.

Involved in developing Web Services to send XML requests and reading the response SOAP UI from the Java platform.

Used various Core Java concepts such as Multi-Threading, Exception Handling, Collection APIs, Garbage collections for dynamic memory allocation to implement various features and enhancements.

Consumed Web Services to interact with other external interfaces to exchange the data in different forms by using Restful service.

Established Database Connectivity using JDBC for Oracle.

Used Log4J for application logging and notification tracing mechanisms.

Developed the ANT scripts for preparing WAR files used to deploy J2EE components.

Analysis and Bug fixing of the production problems and defects along with enhancements.

Implemented JUNIT test cases for unit testing and Suites for end-to-end testing.

Used JIRA for tracking the Project Stories and bug fixing.

Used SVN to check-in and check-out and co-ordinate among team members for Version Controlling.

Environment: Java, HTML, CSS, AJAX, jQuery, JavaScript, JSON, XML, Struts, JDBC, IBATIS, Web Services, SOAP UI, Restful, HQL, SQL, JBOSS, Oracle, ANT, Eclipse IDE, JIRA, Tortoise SVN, and UNIX.

Client: Lancesoft India, Hyderabad, India May 2013 – Jun2016

Role: Software Developer

Responsibilities:

Developed the application based on MVC architecture.

Developed web application using JSP, Servlets, Java beans that uses MVC design pattern.

Created user-friendly GUI interface and Web pages using HTML, CSS and JSP.

Wrote JavaScript for client-side validation.

Used Java Swings in designing user interfaces.

Used Java Fundamentals and OOPS concepts like inheritance, polymorphism, abstraction to develop the code.

Implemented core java concepts like Multithreading, Exception Handling and Collection wherever necessary.

Used Eclipse as an IDE tool for creating Servlets, JSP, and XML.

Wrote SQL for JDBC prepared statements to retrieve the data from the database.

Monitored the logs using Log4J and fixed the problem.

The Application was deployed on Apache Tomcat Server.

Involved in building and deploying the application using ANT.

Used Configuration Management Tools for version control which is built on CVS.

Worked on bug fixing and Production Support.

Environment: Java, HTML, CSS, JavaScript, JSP, Servlets, JDBC, MVC Design pattern, PL/SQL, Log4J, Apache Tomcat server, My SQL, Eclipse IDE, CVS, ANT, Log4J.

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