Applications / Web Servers / Database Server                  

Oracle-ATG web commerce, Oracle Endeca search, IBM HTTP, Apache Tomcat , BEA WebLogic 7/8.1, IBM WebSphere 6.1, WebSphere Portal/ Process, MQ Series Manager, Tivoli Access Manager   JBOSS, SQL Server , Oracle 9i/10g

Java Technologies:

JDK 1.7/1.6/1.5, J2EE, Scala,Java Mail, JMS, JDBC, JavaBeans, Servlets, JavaServer Pages, EJB, JNDI, Applets, Swing, RMI, MVC Framework, Webservices, JAX-WS, Spring, Struts, Hibernate, JSF, MDB, XML, XSLT, Mockiton, and  JUnit.

Other Languages

PL/SQL,SQL UNIX/Linux Shell Scripts, Python,Ruby,PHP, JavaScript, XML.

ORM & Frameworks:

Hibernate, MVC - Struts &Spring.

Design Methodologies:

Design Patterns, OOA/OOD, UML, RUP

IDE:

Eclipse, NetBeans, WSAD, jBuilder, RAD, Visual Studio

Web &Xml Technologies:

HTML 5, DHTML, CSS, JavaScript, AJAX, CMS, XML, XSLT and SOAP.

e-commerce:

ATG Dynamo, ATG 9.x, ATG 10.x, ATG 11, Endeca, WebeSpherecommerce, Hybris

BigData/ Hadoop Ecosystem NoSQL Database:

Hadoop, MapReduce, HDFS, Mahout, Zookeeper, Hive, Pig, Sqoop, Flume, Oozie , HDInsight, Hbase, MongoDB, Cassandra

Database &Tools: 

RDBMS, Oracle 9i, MS SQL 2000, MySQL5.0, Oracle TOAD

Operating Systems: 

Windows (NT,XP, 7, Vista, Server), Unix(AIX Sun solaris)/Linux (Redhat, Suse)

Version Control: 

CVS2.0, Visual Source Safe (VSS),SVN

Build Tools: 

Apache ant, Maven, Hudson, Jenkins, Chef, Puppet

Software Development methodology:

Waterfall model, Agile, Scrum, OOAD, UML, Design Patterns.

Monit tools:

Graphite, Monit.,Appdynamics. Rundeck., logstash, Appdynamics

Management tools:

Jira, vtiger, Assrubutiorsembla, Gemini, asana, Skybot

Client

Citibank

Duration

Nov 2014 – Till Date

Client Location

SFO, CA

Role

Sr Java/Python/Hadoop Developer

Technology

JDK 7, JSF 2.0, Prime faces 3.0, JPA 2.0, Hibernate 3.4, Oracle 11, ESB,Web logic, GIT, Maven ,HTML 5,Javascript and LOG4J, SOAP, Rest, AWS,J2EE, Maven, Informatica,UNIX, Spring, SOAP, REST, Python

Responsibility

·        Incorporate in installing, deploying, and configuring java/JEE applications forATG Commerce, CSC, fand Search/Endeca framework.

·        Successfully build complex web-based application using in Oracle Web Commerce, 9.X and 10.X, 11.X BCC, Endeca search, Infrastructure implementation,

·        Working with developer and designer to create eCommerce website

·         Manage and update eCommerce stores with customized backend functionalities

·        Coach team members and new hires on various eCommerce platforms, CRMs and productivity tools

·        Build and Release ManagementBuilt application logic using Python 2.7.

·        Have delegated in successful administer& troubleshoot various difficult project issues in,Jboss, Web logic and Endeca-ATG integration, BCC administration, Experience Manager, Workbench, dynmo admin, Operational, Search tuning and Infrastructure implementation solutions.

·        Dashboard to keep User Open Conversation and task counts using Node.js and Cassandra

·        Upgraded complete ESB environment from XS40 to XG45, XI50 to XI52 firmware and hardware versions. 

·        •Experienced with Data Extraction, Transformation and Loading using ETL tools like Informatica 8x, 9x and Bancware

·        Architecting complex SOA applications with ESB frameworks

·        Configured mongo clusters on red hat, have complete understanding on mongodb CRUD, indexing, replication and sharding techniques. Also have past experience on DBA functions.

·         used Groovy scripting to incorporate complex logic not possible through boomi interface. 

·        Designed and Developed Web and REST services integration through Datapower ESB for various applications running on Mainframe, WAS, WPS, WMB

·        Build and release software baselines, code merges, branch and label creation and interfaced between development and infrastructure. Performed all necessary day-to-day Subversion support for different projects.

·        Hands on experience with Spark-Scala programming with good knowledge

·        Experienced Hadoop Developer has a strong background with file distribution systems in a big-data arena. Understands the complex processing needs of big data and has experience developing codes and modulesto address those needs.

·        Design the J2EE components of the RestFul Web Services and scheduled Java batch jobs based application in UML.Used existing Deal Model in Python to inherit and create object data structure for regulatory reporting.

·        Expert knowledge on mongodb no sql data modeling, tuning, disaster recovery and backup

·        Experienced on Java/scala object-oriented programming language

·        Providing a responsive, AJAX-driven design using JavaScript libraries such as jQuery, AngularJS, Backbone.js and Bootstrap.js - Using Subversion (SVN) for version control.

·        Worked on Node.js and Socket.io for developing a chat application.

·        Added a script to find fixed tickets for the Akka repository using shell scripting, and converted Akkaclasses to use new functionalities over deprecated functionalities

·        Effectively used GIT(version control) to collaborate with the Akka team members

·        Expertise in designing and developing applications using J2EE technologies including Servlets, JSP, EJB, JMS, Struts, Hibernate, Web Services, XML, JNDI, JDBC, CVS, Maven, HTML, CSS and JavaScript.

·        Hands-on  experience  with  Hadoop  applications  (such  as  administration,  configuration  management, monitoring, debugging, and performance tuning).

·         Resolve, tune, maintain&manageclient’sJboss/weblogic/ WAS– ATGinstances on cluster connectivity producing optimal performance results in each environment throughout the life cycle.

·         Building and monitoring in the project has been done continuously with a CI Tools like Jenkins.

·         Deployment of the Business processes by creating JAR, WAR and EAR files to J2EE application servers.Used build tools on java projects for the development of build artifacts on the source code.

·         Worked on install & Configure (Zabbix, Graphite, AppDynamics) agents as enterprise monitoring tool on windows and Linux operating systems.

·         In depth exposure to creating API for internal and external application using REST and SOAP based design. Open source framework like Jersey used for createREST API.

·         Also worked as a system administrator for the build and deployments process on the enterprise server.

·         Developed, maintained, and distributed release notes for each scheduled release.

·         Implemented scripts for doing Cron jobs, wrote cookbooks (recipes) for all applications to manage the configuration files and to manage them as services.

·         Created views and appropriate meta-data, performed merges, and executed builds on a pool of dedicated build machines.

·         Hands on experience implementing Apache Spark or Spark Streaming project, preferably using Scala, and Spark SQL

·         Developed applications using TDD and Clean Code principles in an Agile environment; Java 1.6/1.8, Spring, Web Services (REST and SOAP), XML, Oracle, SQL, and Hibernate in a relational database design

·         Designed workflows, screens, field configurations and components as part of Projects definition for JIRA as an administrator.

·         Used Ajax and JavaScript to handle asynchronous request, CSS to handle look and feel of the application.

·         Experience in AWS cloud design, Architect, implement, and consultancy.

·         Involved in periodic archiving and storage of the source code for disaster recovery.

·         UsedAtlassianJIRA &vtiger as ticketing tool.

·         Involved in week production window, on monthly on-call support.

·         Working on Namenode high availability customizing Zookeeper Services

·         Collaborate with zookeeper on weekly habitat construction and maintenance tasks which include handling.

·         Daily routine is to deploy the code to the lower environments, automating the deployments.

·         Implemented Subversion branching, merging operations for Java Source Code and tweak if changes in the requirements.

·         Created a demo website running on a Node.js, using the Express framework, Jade, and Backbone.js with Mustache.js for front end MVC/ templating.

·         Worked with the Automation Team to Automate the Windows and Linux Deployments.

·         Configured Jenkins daily periodic backups for Jenkins config and plugins files.

·         Integrated Jenkins Build pipeline plugin for managing multi project jobs efficiently.

·         Customizing ATG Commerce and Merchandizing modules including customizing Catalog, Product display, Pricing, Coupon, Promotions, Cart, Checkout, fulfillment and inventory management.

·         ProficientMDEX engines creation, failovers on multi-clustered environment

·         Resolved numerous configuration issues with Apache, tomcat, plugins & add-on tools likeAkamai Caching. Document Root Cause Analysis for all High Severity issues and present the same to clients

·         Participate in high level team discussions in understanding of Networking Technologies like Load balancer(F5), Firewall, VIP, DNS.

·         Experience in Bootstrap (responsive design), Backbone, and Angular JS frameworks.

·         Quick Response to any given technical situation that requires immediate attention to ensure maximum system availability for supported commerce or middleware instances

·         Sole in charge for Endeca performance tuning, migration, pipeline, cartridges, and templets usingscripts and implement various metrics that can statistically signify the success.

·         Strong understanding and knowledge of Linux, automation and CI Tools like Chef,  Hudson, Jenkins &Gitwith scripting languages (Shell, python, pearl  and ruby).

·         Efficient, cost effective, secure, and scalable AWS cloud design based on business requirements.

·         Provided periodic feedback of status and scheduling issues to the management for change management, production support.

·         Represent, correspond & coordinate, organize meetings like- incident management, change management (CAB), Build and Release management, PCI.

Client

McKesson Health Solutions

Duration

Jan 2010 -Oct 2014

Client Location

Rochester, MN

Role

Sr Java/Hadoop/Python developer

Technology

JDK 7,  JSF 2.0, Prime faces 3.0, JPA 2.0, Hibernate 3.4, Oracle 11, GIT, Maven and LOG4J, SOAP, Rest, J2EE, Maven,AWS, UNIX, Spring, SOAP, REST,microservices

Responsibility

·        This web-based application was built using agile development practices using Extreme Programming.

·        Responsible in Installing, Configuring and Trouble-Shooting IBM Web Sphere Application Server, Network Deployment) and Web Servers like IBM HTTP Server, IBM Web Sphere MQ 5.3, 6.0, IBM Web Sphere Message Broker 6.1, Sun One Web Server on Linux, Solaris, AIX and Windows platforms.

·        Expertise in using cloud services (AWS) EC2, S3 Storage, Kinesis for multiple Big Data  PoC's

·        Designed and developed software applications using Java, Multithreading, Servlet, AngularJS, Bootstrap 3, JSP, JSTL, HTML, JavaScript, Groovy, Grails, EJB, JMS, XML, XSL, JSF, Ajax, JQuery, Adobe Flex 3, GWT, ADF etc. 

·        Developed back-end using RESTful Web Services, Spring, Hibernate, Oracle and Groovy/Grails script with Java code. 

·        Wrote controllers with Groovy to connect front-end interfaces with java services on Grails framework

·        Developed RESTful web services interface to Java-based runtime engine and accounts.

·        Was also involved in migrating Web Sphere applications from 5.x to 6.0 and 6.1x on various operating systems of UNIX (Solaris/AIX/Linux) and Windows.

·         Responsible for developing data pipeline using Hadoop ecosystem to extract the data from weblogs and store in HDFS.

·         Worked extensively on the Python based proprietary framework Quartz.

·         Created a Rich Single Page Application using HTML, CSS, Angular js, JQuery , SOAP and REST Services.

·         In-depth understanding of Map Reduce and the Hadoop Infrastructure.

·         Developed internal application using Angular.js and Node.js connecting to Oracle on the backend.

·         Standardized backup and restore practices for Mongo / Cassandra

·         Installed & configured MMS for Mongo production databases

·          Used various tools to test the REST based web services 

·         Used Spark to create API’s in JAVA and Scala for Big data analysis.

·         Migration of Existing Application to AWS cloud

·         Excellent performance and scalability by integrating Datastax Cassandra

·         Created and Implemented Restful Web Services to provide the interface to the various clients running on both Java and Non Java applications 

·         Worked on Performance tuning on Spark Application.

·         Designed, developed, implemented, and maintained custom Ant tasks in Java and Groovy.

·          Implemented dual security application using Java/Groovy/Grails that eradicates the hazard of compromised credentials during authentication. 

·         Developed and executed software systems utilizing JavaScript and Groovy. 

·         SDesigned and developed Groovy Grails applications for end users. 

·         Developed an automation tool, in Java and Scala on Akka framework, to allow Aspect’s customers to provide a background load of agent traffic on the system, while they perform functional testing on the real clients

·         Excellent performance and scalability by integrating Datastax Cassandra 

·         Served as the sole Web Sphere Administrator for development team. Deployed and configured java based applications with clear understanding of firewalls and ports used to ensure application connections with back-end systems and front-end configurations of IHS

·         Designed, implemented and tested the Spring Domain Model for the services using Core Java.

·         Developed presentation layer using JSP, HTML, DHTML, CSS, AJAX, JavaScript, and JSTL Taglibs.

·         Involved in implementation of application using conventional design practices (Web-Service Oriented Architecture, MVC-Model View Controller).

·         Developed the presentation layer using CSS and HTML taken from Bootstrap to develop for multiple browsers including mobiles and tablets.

·         Good experience with Python, Pig, Sqoop, Oozie, Hadoop Streaming and Hive.

·         Integrated springs framework with Hibernate that is used for Database operations.

·         Collaborated on design spec reviews together with Business Analysts

·         In