Java Developer

Haojun yin

PROFESSIONAL SUMMARY

. Over *+ years of professional experience working on various mission

critical applications for fortune 500 companies in the financial, market

data, pharmaceutical and supply chain domain using Java, J2EE and related

technologies.

. Experience working in the Risk management, Wealth management including

equities and bonds, Mortgage and IT Risk domains in the financial sector

building mission critical applications.

. Experience in design, development and performance tuning of client

server, web, Internet and Intranet based business applications.

. Experience in building server-side components for large-scale Web and

standalone applications.

. Experience in building applications using Service Oriented Architecture

(SOA) using JMS.

. Experience in developing user interfaces.

. Experience using distributed caching mechanism such as Java Caching

System (JCS) to provide low latency, high throughput for the applications

there by providing faster response times and improving the efficiency of

the applications.

. Experience in providing production support for customer related issues

and application maintenance.

. Experience using various application servers - BEA Weblogic, IBM Web

Sphere Application Server and Apache Tomcat.

. Experience using various Java, J2EE and open source frameworks -

Servlets, JSP, JDBC, JMS, Java Mail, Apache CXF, REST, and XML.

. Experience using MVC Frameworks - Struts Framework, Spring Framework.

. Experience using persistence framework- Hibernate, Ibatis.

. Experience using various RDBMS platforms - Oracle, DB2 and Sybase.

. Experience building SQL queries and stored procedures as per the

requirement.

. Experience using JavaScript, AJAX, CSS, JQuery, SmartClient.

. Experience using GWT.

. Experience in writing Shell scripts using bash.

. Experience with documenting the work done for future reference.

TECHNICAL SKILLS:

Languages: Java.

Databases: Oracle, SQL Server, DB2.

Operating Systems: Windows XP/7, Linux, MS-DOS, Unix.

Software/Tools: Microsoft Visio, Edit plus, CVS, Ant, Log4J, SVN, Eclipse,

Netbeans, WSAD.

Java Technologies: Servlets, JSP, EJB, JNDI, JMS, JDBC, Java Mail,

JavaBeans, Applets, RMI, Multi-Threading, Concurrent

packages, Executor Framework, Concurrent Collections,

JNDI/LDAP, Web Services, Swing, Apache CXF, JAXB,

Struts, Spring, Hibernate, Ibatis.

Middleware: SonicMQ

Web Development: HTML, DHTML, AJAX, JavaScript.

XML Technologies: XSL, XPath, XML Schema, SAX, DOM.

Application/Web Servers: BEA Weblogic 10.1, Websphere Application

Server 5, Apache Tomcat Web Server, Apache http

server.

EDUCATION:

Rutgers University, New Brunswick, NJ

M.S. in Computer Engineering, GPA 3.3

Harbin Engineering University, Harbin, P.R. China

B.S. in Electronic Information Engineering, GPA 3.2

PROFESSIONAL EXPERIENCE:

MarketAxess, New York, NY

03/2013 - Present

Title: BondTicker (Market Data)

Role: Java/J2EE developer

MarketAxess offers the industry-standard Corporate BondTicker, which

provides market participants with real-time Finra TRACE data enhanced with

MarketAxess fixed income trade data and analytical tools. Market Data feeds

for US Corporate bonds, European corporate bonds, High Grade, High Yield,

Emerging Markets, Credit Default Swaps (CDS) are also provided. Corporate

BondTicker is offered as a web-based service and is also integrated

directly into the bond trading system. Clients using the trading system for

fixed income trading can use the application to get the market data of the

fixed income securities they would like to trade. Xtrakter feeds were used

to provide information about European securities and MorningStar feeds were

used to provide information about securities held by companies within

various funds.

Responsibilities:

. Used code Java to create the process which would parse the incoming

market data feeds in xml and csv formats and persist them to Oracle

RDBMS.

. Used JMS to implement service oriented Architecture (SOA) to perform

various operations like import data from trading system, retrieve FX

rates and many more.

. Integrated Spring framework in the application to implement IOC and

Dependency injection.

. Used Smart Client JavaScript library and Java api to develop the UX to

present the data feeds.

. Used Java and pl/sql stored procedures to determine end of day trades

and calculate opening and close levels for CDS and SEF and setup batch

jobs to send emails to report the trades and comply with CFTC

regulations.

. Used Perforce for source code management.

. Used JQuery, Ajax, CSS, and JSP as UI components to display the

enriched market data in user friendly format.

Environment: Java, J2EE, JMS, Sonic MQ, Smart Client, JQuery, JavaScript,

PL/SQL, Oracle, Perforce, JSP, CSS, AJAX.

J.P Morgan Chase, New York, NY

10/2011 - 02/2013

The following projects were designed, developed and driven to practice

through the combined efforts of the IT Risk and Security team of the

Investment Banking division at JPMC.

Title: Enterprise Entitlements Service (EES)

Role: Java developer

EES is a firm wide Identity Access Management/entitlements solution to

determine the entitlements of a user. Hundreds of applications make use of

EES to generate xml based policies and validate requests which determine

what a user is entitled to. The application provides various interfaces

through which clients can send a request and determine what resources they

are entitled to. Groups such as Investment banking, commercial banking, and

trading desks are few of the internal clients using the application. The

application is capable of handling few thousand transactions per second and

provides low latency, high performance by making use Core Java, distributed

caching, J2EE technologies.

Responsibilities:

. Implemented the core request/policy validation engine using XACML

standard and Core Java, XML making use of Collections, Exception

handling, Threads, Concurrent packages, garbage collection,

serialization to process the high volume of transactions which could

run into few thousands per second.

. Used Java Caching Service (JCS) which provides low latency by caching

the data and decreasing the number of calls made to the database and

thus provides swift response and improves the performance of the

application.

. Built a role based application and implemented MVC architecture using

Spring framework and used JSP's, Ajax, JavaScript, and CSS as some of

the tools to enhance user experience.

. Built RESTful web services using Jersey api and annotations to

provision roles and attributes for users.

. Used J2EE filters, cookies to intercept the incoming requests and

provides web services authentications.

. Built a GWT based user interface to invoke the web services.

. Involved in converting Sybase stored procedures to Java as part of a

migration process from a legacy system.

. Used JConsole to performance tune the application and improve the

performance of the application.

. Migrated the existing engine from XACML 2 to XACML 3 using Java.

. Used Hibernate as persistence framework to persist data to Oracle

RDBMS.

. Used Maven to build and deploy the application.

Environment: Java 1.6, J2EE, Spring, Servlets, HTML, JSP, GWT, JDBC,

Hibernate, SVN, Linux, Windows 7, Oracle, SQL, Ajax, JavaScript, Web logic,

Tomcat, Eclipse IDE, Sybase, Oracle, JAXB, XSD, Junit, JCS, Subversion,

Jersey, Maven.

Title: EES History and Audit Logging (EHAL)

Role: Java/J2EE developer

EES History and Audit Logging application provides a history of all the

transactions that are performed inside EES. This information is used by the

audit team to check for compliance and see if the entitlement requests made

were legible or not. This information is also used to implement the pay-per-

request model to bill the clients using the EES service based on the number

of evaluations they request thus generating revenue. The application

provides a user interface where a wealth of information can be requested

about the various clients using EES, the transactions they have requested;

generate reports to bill the clients; estimate the future volume of

transactions to identify if new hardware is required and much more.

. Implemented core functionality of building a server which would parse

the log files and persist the data to the backend using Core Java,

JDBC, concurrent Collections, Threads and other features provided by

java API.

. Implemented the producer/consumer design pattern by making use of

concurrent Collections.

. Used Oracle as the RDBMS and wrote SQL queries to persist data to the

backend.

. Built a user interface using JSP's, Java script and other GUI

technologies which provide the ability to query the backend and

generate reports for billing purposes. The interface is also useful to

query historical transaction information.

. Used svn as code repository and ANT as the build tool.

. Used JUnit for unit testing the code.

. Deployed application on Web logic server in Linux environment and

involved in trouble shooting in case if any issues.

Environment: Java 1.6, J2EE, Servlets, HTML, JSP, JDBC,SVN, Linux, Windows

7, Oracle, SQL, Ajax, JavaScript, Web logic, Tomcat, Eclipse IDE, Oracle,

Junit, Subversion.

Bristol-Myers Squibb (BMS), Lawrenceville, NJ

08/2010 - 09/2011

The following projects were designed, created and driven into practice

through the combined efforts of the Research and Informatics team and

direct hands-on participation at BMS.

Title: Arctic

Role: Java/J2EE/SQL Developer

Arctic is a high profile Lab Information Management System (LIMS)used to

record and maintain several types of biological reagents used within BMS.

The system currently supports Cell Lines, Proteins, Expressions Constructs,

Antibodies and general reagents. The system provides a user friendly web

interface and is built using various Java and J2EE technologies.

1) Migration of huge amount of data from a legacy system to Arctic making

use of PL/SQL, functions, procedures and queries.

2) Involved in coding a standalone server which processes XML data over

HTTP requests. These requests are sent using REST services.

Responsibilities:

. Collaborated with research scientists (end users) and team leader to

gather requirements to build new modules in the existing system.

. Built a role based application and implemented MVC architecture using

Spring and Struts frameworks with Velocity as the view component.

. Used Hibernate as the persistence frame work to persist to the Oracle

RDBMS.

. Built a standalone server which serves XML over HTTP requests using

Apache CXF API and core Java. This server upon request connects with

other systems at BMS to retrieve data related to Arctic.

. Efficiently used core Java features such as Collections, Exception

handling, Comparators to process transactions.

. Used REST services to build a client to upload XML data to the server

and also query against the data stored within Arctic.

. Migrated data from a legacy system to Arctic using source code written

in PL/SQL making user of functions, procedures and SQL queries to load

large amounts of data into the database.

. Used quartz API to run batch jobs and publish data stored in Arctic to

other systems within BMS which would be used by the research

scientists.

. Used Ajax, JavaScript, and CSS as some of the tools to enhance user

experience.

. Used Subversion as the repository for the source code.

. Application is deployed in the Tomcat server and hosted on Redhat

Linux operating system.

Environment: Java 1.6, J2EE, Spring, Struts, Ibatis, SVN, Linux, Windows

XP, Oracle 10g, SQL, Ajax, JavaScript, Tomcat, Apache CXF Web services,

Eclipse IDE,Net beans IDE.

United Parcel Service (UPS), Paramus, NJ

09/2007 - 07/2010

Title: Migrating Host Interactive Legacy server code to Java

Role: Java/J2EE Developer

Host Interactive is widely used client-server software by high profile UPS

customers built initially in C. The server code lacked scalability and

maintainability. As a Java developer, drove departmental strategic planning

and the successful migration to a Java/J2EE enterprise computing strategy

and IT services framework. The legacy code hosted on AS400 and written in C

was migrated to the Linux platform and re-written in Java.

Responsibilities:

. Collaborated with User Reps and clients in gathering the business

requirements.

. Used best practices such as OOD to develop efficient, scalable and

maintainable server-side Java code and meet the SLA requirements.

. Efficiently used core Java features such as Multi-Threading,

Collections, and Exception handling to process high volume

transactions.

Environment: Java 1.5, J2EE, Hibernate 3.0, CVS, ANT, RPM, Linux, AS400,

UNIX, Windows XP, Linux Shell scripts, Weblogic 10, Oracle 10g, SQL,

Mainframe, TSOD, File aid, IBM AS400 client.

Title: SCOR (Strategic Customer Optimized Response)

Role: Java/J2EE developer

SCOR is a non-contractual service offering that will provide constant

management of SCOR packages with an origin/destination in any valid UPS

shipping country. The basic concept of SCOR is to monitor specific small

package shipments of Strategic Accounts, which are large multi-national

accounts to which UPS must provide excellent service in order to increase

volume, revenue, and prevent competitors from targeting this high level

customer segment that UPS serves.

Responsibilities:

. Implemented MVC architecture using Spring framework and used Java, JSP

to build the application.

Environment : Java 1.5,J2EE, Spring 2.5, JSP, JavaScript, SQL, HTML,

Tomcat Web server 5.X, Web logic 10.1, Oracle 10g, Eclipse 3.2.

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