Web Services Software Engineer

Varun Venkaya

Senior Full Stack Developer

E-mail: ac2ia6@r.postjobfree.com Mobile: 678-***-****

PROFESSIONAL SUMMARY:

Having 7+ years of experience in designing, implementing and deploying commercial Enterprise Applications for Multi-tiered-distributed software products and distributed applications using Java/J2EE technologies

Experienced in defining and designing the layers, components of the project using OOAD methodologies and standard J2EE patterns and guidelines

Excellent experience in developing secure Web applications and server side development using Hibernate 3.0/4.0, JSF, JNDI, Spring, JSTL, Struts, EJB 2.0/3.0, XML, XSLT, JavaScript and Gang of Four Design Patterns

Experience in design and implementation of NOSQL based solutions using MongoDB and Cassandra.

Experienced in User Experience design and development and visually appealing User Interfaces using HTML 5, CSS3, Bootstrap, JavaScript, JQuery, AngularJS and Node JS.

Experienced in using JavaScript Grid frameworks like Ag-Grid

Experience in development using MEAN stack and MERN stack.

Excellent experience in SOA based integration using Web services technologies such as SOAP (Simple object access protocol), REST (Representational State Transfer) and WSDL (Web Services Description Language).

Experience in securing web services using Jason Web Token and other authentications procedures.

Hands on experience in using JSON and XML for transferring data and working experience of various parser to get data from these formats.

Proficient in all Phase of SDLC (Analysis, Design, Development, Testing and Deployment) and gathering user requirements and converting them into software requirement specifications using Rational Rose, Object oriented Techniques, and Design patterns.

Thorough knowledge of Microservice architecture and experience in implementing several design patterns.

Experienced in logical and physical design of database and good working experience in working with relational databases like Oracle, DB2 and MySQL databases.

Experienced in writing SQL queries and joins to fetch data from the databases.

Expertise in different software development methodologies such as Agile Methodology, and Waterfall.

Mentoring off-shore team and leading all kinds of priority issues. Handled internal technical trainings for team members and played crucial role in their skill development for successful.

TECHNICAL SKILLS

Languages:

Java 5.0/6.0/7.0/8.0, SQL, XML, PL/SQL

Framework/APIs/Tools

Apache Struts 1.x/2.x, JUnit, Hibernate 3.0/4.0, Spring 3.x/4.x, Web Services (SOAP, WSDL) AJAX

J2EE Common Service APIs:

Servlets, JSP, JDBC, EJB 2.0/3.0, JPA, JNDI, JAXP, JAXB

XML Web Services:

XML, SAX, DOM, JAXB, WSDL, JAX WS, XPath, SOAP, REST, XSLT, XHTML, DTD.

Client side Web Development:

AJAX, HTML 4/5, CSS, Bootstrap 3.x.x, Java Script, JQuery 3.X.X, Angular JS 1.5.x, React JS

Web Servers:

WebLogic 8.1/9.2/10, Apache Tomcat 5.5 /6.0/7.x/8.x, WebSphere 6.x/7. x.

Databases:

Oracle 11g/10g/ 9i/ 8i, MS SQL Server 2005/08/12 and DB2, MySQL, MongoDB

Version Control:

CVS, SVN, Microsoft VSS, Clear Case

IDE:

My Eclipse, Eclipse 3.x/4.3/4.4/4.5, JDeveloper 11g, IntelliJ IDEA 14.0

Methodologies

Waterfall, Agile, TDD (Test Driven Development)

PROFESSIONAL EXPERIENCE

Client: Hewlett Packard, Atlanta, GA Sep'16-Present

Project: HP Care Pack, Customer ID Enhancement

Role: Senior Full Stack Developer

Description: Involved in developing hp care pack an application that has suite of intuitive functions that can be accessed by partners, customers and administrators. The application had different level of functionalities depending on the users access level

Responsibilities:

Involved in Requirements, Design, Coding, Unit testing and Integration Testing phases of the project.

Developed ReactJS for front end, web services for middle tier and developed XML and XSL objects for Data conversion/transfer.

Used Spring Core Annotations for Dependency Injection Spring DI and Spring MVC for REST API and Spring Boot for micro-services.

Created several Exception classes to catch the error for a bug free environment and logged the whole process

using log4j, which gives the ability to pinpoint the errors.

Involved in analyzing and the solving the problems and developing the enhancements to resolve the bugs/issues.

Writing test cases for unit testing, integration testing and in UI testing.

Experience in unit testing frameworks like JUnit, easymock, mockito, powermock.

Used Maven to build and deploy the builds of the developed applications on WebLogic application server. Logged and tracked issues after release using HP Quality Centre.

Worked closely with the team to achieve continuous integration and continuous delivery.

Environment: Web Services, Spring, Maven, Java Script, log4j, SQL Server 2010, WebLogic 9.2, Tortoise SVN, Eclipse, MERN Stack.

Client: Hewlett Packard, Atlanta, GA Nov'15 - Sep'16

Project: Shared Services SOA

Role: Java Developer

Description: Developed a application to manage shared service utility for the benefit of various business unit within the organization.

Responsibilities:

Design and implemented application using React JS, Spring MVC, Spring IOC, Spring Annotations, Spring AOP, Spring Transactions, STS, Hazel cast.

Developed enterprise inter-process communication frame work using Spring RESTful Web Service.

Developing SOAP Web services and REST Web services (JAXB, JSON, JAX-RS, JAX-WS)

Developed and supported the UI web pages using Angular JS, JQuery, AJAX, Bootstrap and bower and Node JS.

Implemented Spring MVC framework in the presentation tier for all the essential control flow, business level validations and for communicating with the business layer.

Involved in the analysis, design, and development and testing phases of application using agile scrum methodology.

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

Analyzing the issues and proactively identifying potential problem and its solution. Respond and close technical escalation from QA team and from the analysts, closing problems by trouble shooting and involving in root cause analysis.

Used Web Services (SOAP) for transmission of large blocks of XML data between two interfaces.

Involved in Test Driven Development(TDD) model using JUnit.

Developed and supported the UI web pages using JSP, JQuery, AJAX and XML

Performed root-cause analysis of issues, some coding changes, and testing of changes, processes.

Environment: Java, UI, Spring, JSON, Hibernate, JSP, XML, JQuery, Ajax, HTML5, CSS3, React JS, Node JS, Oracle, MongoDB.

Client: CENGAGE Farmington Hills, MI Mar'15 - Nov'15

Project: Content Management

Role: Java Developer

Description: Designed and developed Application for data upload, storage, verification and retrieval process. Facilitated users to upload files to server and perform operations.

Responsibilities:

Analyzing the requirements and coming up with the Estimation and Plan for Sprint releases during Sprint Planning.

Coding and developing the Web Application using Angular JS, Spring, RESTFUL Web service

Involved in creating packages which are called by multiple departments in the organization for validation.

Have Designed API and Web Security for availability that uses Single Sign on (SSO), OAUTH, and Jason Web Token (JWT) for integrating with third party vendors.

Involved in implementing Enterprise Java Beans (EJB’s) to access the database.

Worked on REST based Web Services to specify business behaviors and backend calls.

Developed REST based entity and composite services for provision, which takes care of notification, calendar and employee services.

Developing, debugging, deploying and testing Restful web services using Jboss, SoapUI, Oracle, Putty and MCP.

Involved in Enterprise design and development to improve the scalability of the system.

Used Cassandra query language to access data from NoSQL Cassandra DB

Involved in migrating data from single table to distributed setup.

Experience working with AWS for Storage, content delivery and Application deployment services

Involved in the development of scheduling reports feature, Bug fixing and code maintenance and in mentoring new Joiners.

Environment: J2EE 1.6, Spring 3.x, Angular JS, JDBC, XML, Log4J, JUnit, SVN, Maven, GitHub, Jenkins, JBoss, IntelliJ 14, Oracle, Web Services, SoapUI

Client: CENGAGE Farmington Hills, MI Sep'14 - Mar'15

Project: Reporting Suite

Role: J2EE Developer

Description: Involved in Developing a web based in-house application for managerial team to assign executive, editorial duties to employees. Also Employees will account the progress of the activities. Managerial teams could spawn reports in accordance to the progress of activities by the employees.

Responsibilities:

API is secured using the popular OAuth 2.0 standard, and communicates with the client using JSON.

Followed agile software development, Test driven development and scrum status meetings.

Developed use case diagrams, class diagrams, database tables and mapping between relational database tables.

Worked with Agile software lifecycle methodologies. Create design documents when and as required. Perform coding, debugging and testing.

Developed back end of the application using Spring framework.

Implemented MVC architecture application using spring and developed Business Layer and DAO Classes and wired them using Spring Framework.

Integrated spring (Dependency Injection) among different layers of an application.

Designed Frontend with in object oriented JavaScript Framework like Angular JS.

Utilized various JQUERY plugins to build Rich Internet Application (RIA) to make it look more intuitive.

Used HTML5 in developing front end application.

Implemented JMX in the application for monitoring and managing application.

Restful web services have been developed using Jersey(JAX-RS) frame work.

Used Jenkins as the automation server.

Hands on experience on Git-Stash, Maven for continuous integration and continuous delivery

Deployed application in Tomcat Application Server and Testing using SOAPUI and POSTMAN.

Provide production support. Fix production defects.

Environment: J2EE, JSON, Spring 2.0, Hibernate 4.0, CSS 3, HTML 5, Web Services, Angular JS, SOAP,REST, Oracle, WebLogic 9 and JUnit, MEAN stack.

Client: Hyundai Motors India Nov'13 - Aug'14

Project: HY-DAA

Role: Senior Software Engineer

Description: A web-based platform to manage the work flow and expedite the communication by dealer appointment between dealers and administration.

Responsibilities:

Involved in all phases of Software Development Life Cycle (SDLC) like gathering the requirements, analysis, design, development, unit testing and deployment of the project.

Developed the application using Java, Struts Framework.

Front end development using JSP, CSS and client side validations performed using JavaScript.

Experience with Test Driven Development.

Environment Java 5.0, HTML 4.0, CSS 2.0, JavaScript, JDBC, Oracle 8i.

Client: A.S.B Tools Feb'13 - Nov'13

Project: MTW-DMS

Role: Software Engineer

Description: Developed a Dealer administration system web application to increase the visibility, communication and transactions in the business process.

Responsibilities:

Involved in understanding the Requirements, Designing and preparing the technical specification document with Architecture diagram, Class diagram, Sequence diagrams.

Configured Oracle connection pool, which is included in Oracle JDBC driver JAR file, to allow concurrent access to the database and optimize performance.

Designed and developed Custom tags, Action classes and configured Message Resources, Action messages and Action errors.

Designed and Developed front-end using struts framework. Used JSP, JavaScript, JSTL, EL, Custom Tag libraries, Tiles and Validations provided by struts framework.

Responsible for coding SQL Statements and Stored procedures for back end communication JDBC.

Extensively worked on Prepared Statements and Callable Statements of JDBC 2.0 API to access the Oracle database.

Wrote authentication and authorization classes and manage it in the front controller for all the users according to their entitlements.

Involved in performance tuning of the application to meet nonfunctional requirements.

Deployed the application in the Tomcat Server environment using Ant tool using Struts architecture with the JSP Client.

Environment: JAVA 5.0, J2EE 1.4, JSP, Servlets, JDBC, JavaScript, Tomcat, Oracle 8i, UML, XML.

Client: A.S.B Tools Jul'12 - Feb'13

Project: MTW - IMS

Role: Software Engineer

Description: Application to help in store management with planning and executing in Distribution center. It also provides ease in distribution process including projected sales and optimal inventory by stores.

Responsibilities:

Involved in Analysis, Design and Developing, of implementing the Business User requirements.

Used Design patterns like Singleton, Factory Methods, MVC, Dependency Injection, DAO.

Developed user interfaces using JSP, CSS.

Developed the application using Java, Struts Framework and Hibernate

Used AJAX for request response processing without reloading the complete page.

Used behavior-driven development framework (Jasmine) for testing java script code.

Used Maven scripts to build the J2EE application.

Designed web screens using HTML, JSP, Java script, CSS, AJAX, JSON.

Performed comprehensive unit testing before passing on the application to the QA team.

Experience with Test Driven Development.

Environment Java 6.0, Struts 2.1, Hibernate 3.0, JavaScript, Maven, Agile, MySQL 4.1, Eclipse 3.5, SQL developer 1.5, Putty.

Client: A.S.B Tools Dec'11 - Jul'12

Project: Performance Tracker

Role: Software Engineer

Description: Developed web application to audit and monitor the performance of employees against various standard and reward them with incentives.

Responsibilities:

A robust and dynamic website for managing incentive applications and manage annual performance data for employees

Wrote stored procedures and triggers extensively and working very closely with developers, business analyst and end users to generate various audit reports

Various programs and survey structures were designed to efficiently track of performance. Reporting were done to project how every employee would qualify for the incentive based on predefined criteria.

Wrote conversion scripts using SQL, PL/SQL, stored procedures, functions and packages to migrate data from SQL server database to Oracle database.

Environment: SQL, PL/SQL, Oracle 8i, EDMS, Java 5.0.

Client: A.S.B Tools Jun'10 - Dec'11

Project: ITL-DMS

Role: Software Associate

Description: Conception and design of database for their inventory management system and information about products located at various stores, to enable business partners to access information online

Responsibilities:

Extensively worked on writing complex SQL queries (cursors, ref cursors, sub queries, correlated sub queries)

Provided support and managed SDLC for multiple business groups

Handled modules related to project development for logistics applications that includes analyzing, developing, debugging and testing code, in the real-time application environment and designed Data Modeling, Design Specifications and to analyze Dependencies.

Involved in various phases of application life cycle; tasks included research, gathering, modeling, analysis, designing, development, debugging, testing, and deployment.

Environment: SQL, PL/SQL, Oracle8i, DMS.

EDUCATION DETAILS

Bachelor of Engineering in Mechanical Engineering, Anna University, India.

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