SUMMARY

• 10+ years of IT experience with clients like Confidential, Astrazeneca Pharmaceuticals, Hertz Car Rentals, Confidential .
• Experienced in full software life cycle development of large - scale enterprise applications using Java & JEE and Master Data Management System using Informatica Power Center/Spring Batch.
• Hands-on experience of implementing Gang of Four (GoF) and J2EE design patterns.
• Hands-on experience with Spring Core, MVC, Batch, AOP, JMS, Web Services, Hibernate ORM, Caching using Ehcache and TDD using JUnit, Mockito.
• Experienced in designing & developing high volume data processing using Spring Batch.
• Experienced in multi-tenant/distributed/sharded data persistence using OpenJPA
• Experienced in OLTP, dimensional and factual data modeling.
• Hands-on experience of SQL queries and SQL tuning on Oracle 11g/MySQL databases.
• Well versed with SDLC, System Analysis, Unit Testing, Integration Testing of web applications & ETL/Batch systems.
• Experienced in using version control systems like Apache SVN, CVS, Tortoise and continuous integration using Jenkins and build tools Maven & Ant.
• Experienced in agile methodology, sprint scoping, capacity planning, daily scrums for discussing sprint stories.
• Strong communication skills and capable of handling teams independently.

TECHNICAL SKILLS

Language: Java SDK 1.5/1.7, SQL, XML

Technologies: Spring Suite(Core, Security, MVC, Web Services, Messaging, AOP, Batch, Data Solr), Hibernate 4.x, OpenJPA 2.2.x, SOAP, RESTful web services, Data Caching.

App/Web Servers: Jboss 3.2.3/4.x, Tomcat 7.x, WAS 6.1

RDBMS: Oracle 11g, SQL Server 2005, Sybase 12.x, MySQL 5.1

ETL: Informatica 8.6

GoF Patterns: Behavioral Patterns (Observer, State, Strategy, Template Method) Creational Patterns (Abstract Factory, Factory Method, Singleton) Structural Patterns (Adapter, Decorator, Facade, Proxy)

DB Tools: SQL *Plus, Toad, SQL Server Analysis Services 2005, Erwin

SCCS: CVS, PVCS, SVN and Tortoise

IDE: Eclipse 2.0/3.0/Europa, IntelliJ Idea

Monitoring: Logdigger, Yammer

PROFESSIONAL EXPERIENCE

Confidential, Wilmington, DE

Senior Java Developer

Environment: Java 1.7, Spring Batch 3.x, Spring JDBC, Hibernate 4.x, Oracle 11g, IBM Data Stage, Control M, H2

Responsibilities:

• Analysis of flat file specifications to automate generation of files.
• Used Java Concurrent API to develop Multithreaded Spring Batch jobs
• Designed and coded generic implementation to be reused across all DB select queries.
• Created partitioned multithreaded steps to handle high volume of data using TaskExecutor framework.
• Used EhCache to cache large volume DB calls.
• Configured nested StepJob to run nested jobs for parallel batch processing
• Used H2 DB for in memory DB for unit testing the framework using Spring4JUnitRunner
• Participated in end to end integration testing of the framework
• Worked closely with project management & architects to delegate the work to other developers.

Confidential

Lead Java Developer

Environment: Java 1.5, Websphere 6.1, Spring Suite, Hibernate 3.6, RESTful web services using Jersey 1.03, Jackson API, Spring JMS, Logdigger, Yammer

Responsibilities:

• Participated in gap analysis between the Hertz & Dollar Thrifty systems.
• Developed RESTful web services using Jersey API with underlying Spring 3.0 service layer and Hibernate DAO layers
• Developed RESTful web services method with appropriate RequestMapping for MediaType and HTTP Methods to align with the business functionality.
• Developed Exception Mappers to handle exceptions in the RESTful services to produce appropriate error messages using ResponseStatus specification.
• Configured role based authentication/authorization to REST URLs using Spring Security.
• Used Adapter design pattern to create new classes by reusing existing Hertz specific classes.
• Used Spring JMS to integrate to Hertz legacy systems to get the real time rates and fleet availability.
• Worked closely with project management & architects to delegate work to other developers.
• Developed filters to enable Cross Origin Resource Sharing(CORS)

Confidential, Wayne, PA

Senior Java Developer

Environment: Java 1.5, Jboss Application Server 4.3, Spring Suite, Hibernate 3.6, SOAP web services using Spring, Foglight

Responsibilities:

• Analysis of Fog Light traces for slow methods and memory leaks.
• Analyzing Hibernate mappings and fetching strategies.
• Writing proof of concept code to demonstrate efficient handling of Hibernate mappings to minimize HQL.
• Analyzing locks and blocked threads during performance tests

Confidential, Park Ridge, NJ

Lead Java Developer

Environment: Java 1.5, Websphere 6.1, Spring Suite, Hibernate 3.6, RESTful web services using Jersey 1.03, Jackson API

Responsibilities:

• Architected and developed RESTful web services using Jersey API to cater the data requirements of front end/web UI.
• Integrated the Jersey REST layer with the underlying Spring 3.0 service and Hibernate DAO layers
• Coded object mappers Jackson API to generate the JSON response for integrating the backend services with the front end UI system.
• Designed filters to implement single-legged OAuth to tokenize and verify incoming HttpRequests
• Designed shopping cart using the AOP scoped proxy technique.
• Created an independent unit tests context to perform unit test on Spring context classes
• Integrated Cobertura plug-in Maven to generate code coverage reports.
• Integrated Jersey Test API with JUNIT to use Grizzly web server to run the unit tests for Jersey web services.
• Configured second level hibernate caching using ehCache.

Confidential, Wilmington, DE

Senior Java Developer

Environment: Java 1.5, Tomcat 5.5, Spring Suite 3.1, Hibernate 3.6, Spring JMS, Spring Batch

Responsibilities:

• Developed batch jobs to load new and update existing accounts using Spring Batch 2.2
• Developed contract first web services for users to access the core functionality of the product.
• Used Spring Webservice to define XML messages for request & response and coded the Endpoint classes and JAXB to handle the response from Barclay UK web services.
• Used Apache ActiveMQ message broker and Spring JMS to queue the messages when the Barclay UK web services are down and created spring batch jobs to send the message details using flat files.
• Enhanced the Java Spring Batch 2.1 jobs which generated feed of flat files to clients.
• Automated the tests of Web Applications using Selenium 2.1.
• Used test driven development (TDD) using JUnit & HSQL in-memory DB for unit tests.
• Used Freemarker 2.3 to generate statistics reports of the spring batch jobs.
• Also designing a home grown Cloud environment to distribute the processing of batch jobs over server nodes which will run over sharded database instances.
• Attended daily scrum calls/meetings and participated in peer review.

Confidential, Jersey City

Environment: Java 1.5, Spring Batch 2, Sybase DB 12, Maven, JUNIT

Responsibilities:

• Analysis & comparative study of business processes of the current & the new vendor.
• Responsible for the designing the domain model, development and implementation of back-end tier component for extracting, transforming, loading data and generating flat data files using Java Spring Batch 2.x.
• Designed object hierarchy, relationships using UML class diagrams & sequence diagrams.
• Analyzed and developed "Gang of Four" Design Patterns to simplify object hierarchy and promote object reuse and improve overall efficiency of core business functionality.
• Implemented composite readers & writers in Java Spring API to develop generic classes for persisting multiple OR mappings and generating flat files from various DB tables.
• Used test driven development (TDD) using JUnit & HSQL in-memory DB for unit tests.
• Used Java Cryptography DEsede algorithms to encrypt/decrypt the data files.
• Coordinating/managing the project schedule with the on site team in London.