Resume

 

 
VertFuture is specialized in Microsoft B2B and EAI technology. VertFuture employee received Microsoft™ Biztalk MCP certificate ...

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David C. Li, Ph.D.
Contact Information:
Phone: (267) 218 2491
Email: dli@vertfuture.com
Objective: Technical lead consultant in the areas of Enterprise Application Integration (EAI), B2B integration or Data Warehousing.
Education: Ph.D. Department of Chemistry, University of Pennsylvania, August 1995.
B.S. Department of Chemistry, University of Science and Technology of China (USTC), June 1989.
Skills: Major skills are listed below.
  • Software: Microsoft BizTalk Server 2000/2002/2004/2006, Microsoft Visual Studio .NET 2003/2005, Microsoft Office InfoPath, webMethods B2B Server/Developer 3.51, WebLogic Server 6.0/6.1/8.1, IBM MQSeries 5.2, iPlanet LDAP Directory Server 5.1, Visual C++, VB, Visual J++, Visual Interdev, Crystal Report, Borland Jbuilder 5/6/7/8/9 Enterprise, Symantec Visual CafC), Borland Delphi, Sonic Stylus Studio, XML Spy, XML Authority, Easy Access 2000, Yantra, MS SQL server 6.0/6.5/7.0/2000/2005, Oracle 7.0/8.0/9i/10g, SQL Navigator, Toad, ERWin, SQLPlus, Rational Rose and Microsoft Project.
  • Languages and technologies: C#, Java, VB, C, C++, XML, XSLT, XPath, DTD, XSD, DOM, SAX, Xerces, Xalan, Composite UI Application Block (CAB), J2EE, EJB, MDB, JMS, Korn Shell, Ant Script, MSBuild, HTML, ASP, JSP, Servlet, VBScript, JavaScript, Web Services, ADO, ADO .Net, ATL, COM/DCOM, MTS/COM+, EDI, CIDX, IDOC, RosettaNet, SQL, Transact-SQL, PL/SQL, Oracle Package, OOP and Object Pascal.
  • Protocols and networking: LDAP, VAN, SSL, FTP/SFTP, HTTP/HTTPS, SOAP, POP3, SMTP, Firewall, DNS, and WINS.
  • Operating systems: Windows 2003 Server, Windows XP, Windows 2000 Advanced server, Window NT 3.51/4.0 server, Window 95, Unix, Linux and Macintosh OS.
Certification: Microsoft Certified Professional of Designing and Implementing Solutions with Microsoft BizTalk Server 2000, Enterprise Edition
Awards:
  • Peer Recognition Award, Air Products. (February 2003, March 2003 and April 2003).
  • Recognition Award - Employee of the Year 1998, Users Inc.
  • Special Recognition - 100% Club Award Winner 1998, Users Inc.
  • Recognition Award - Employee of the First Quarter 1998, Users Inc.
  • Graduate Student Travel Award, American Physical Society. (Dec. 1994).
  • Outstanding Student Awards, USTC. (Feb. 1989, Feb. 1988, Feb. 1987).
Publications: What can JCA Adapters Do? Java Developer Journal, Volume: 07 issue: 03. March 2002.
Experience:
Lead Consultant, Confidential  (Nov 2006 - Present)
  • Established BizTalk development framework and guideline and led a team of BizTalk developers through the full development life cycle of the BizTalk applications of the client’s commercial lending system ("Beacon" project). Developed and supported 10 applications including party management, partner management, account management, pricing, rate card, submit decision, submit approval, re-pricing, contract integration etc.

    The BizTalk system serves as the business process engine in a middleware environment. The middleware system is designed in a loosely coupled, service oriented architecture (SOA). The BizTalk system interacts with IBM message broker through MQ queues and web service. It also interacts with several autonomous systems such as SuperTRUMP, Vertex, ICV, LoanPath and iWay directly through web services or indirectly through IBM message broker. Microsoft BizTalk 2006 orchestration, web service, MQ, XPath/XSLT, C# and SQL were heavily used. System load balancing and fail-over architecture were designed and planed. Fine tuning work was performed to remove performance bottleneck and to shorten performance latency.
Consultant, Confidential  (Nov 2005 - Oct 2006)
  • Heavily involved in the design and development of the front-end and the middle tier of a large scale clinical study application. The application is used by client to manage study, assay, storage, sample, CRO, worklist and other study related entities. The application uses Microsoft architectural framework Composite UI Application Block (CAB) and Model View Presenter pattern to achieve modular development on the UI tier. Its multi-tier architecture design separates data tier, business tier and UI tier. In addition, Microsoft Visual Studio .NET 2005, Infragistics Grid, Oracle 9i/10g, Web Services and ADO .NET are used.
Consultant, Confidential  (Part Time, Aug 2006 - Sept 2006)
  • Designed and developed client’s tax processing application using BizTalk 2006. The application maps and aggregates tax data from the input file and deliver the transformed data into Microsoft SQL server. Performance study was done to optimize the solution for 1/2 million input records. Microsoft BizTalk 2006 server, BizTalk mapping, orchestration and SQL adapter are used to develop the solution.
Lead Consultant, Confidential  (Part Time, Mar 2006 - May 2006)
  • Designed, developed, deployed and supported client’s invoicing system for Wide Area Workflow (WAWF). The system translates client’s invoice from its internal flat file format into WAWF format using BizTalk mapping. It correlates an invoice with its attachments and synchronizes their delivery sequences using BizTalk Orchestration. Microsoft BizTalk 2004 server is used to develop the solution.
Lead Consultant, Confidential  (May 2005 - Nov 2005)
  • Designed and developed client’s BizTalk messaging hub. The messaging hub is used to route and map more than 44 types of source feeds among client’s AP/GL system, property management system and purchasing system. A BizTalk template solution and a setup tool were developed to automatically create the basic BizTalk solution framework for a given source feed. Microsoft BizTalk 2004 enterprise server, BizTalk mapping, BizTalk FTP adapter, BizTalk SMTP adapter and BizTalk SQL adapter are heavily used. The messaging hub is designed to have mission critical features such as load balancing, fail-over and easy disaster recovery. Fine tuning was done to enhance performance and system stability.
  • Designed and developed web based message tracking system for high volume message flow. It allows one to query the message flow status of any given source, given time period and given file name filter.
  • Designed and developed a windows service component for BizTalk monitoring. It monitors errors in event viewer and suspended queue items. It informs system administrator with emails when errors or suspended queue items occur.
Consultant, Confidential  (Nov 2004 - May 2005)
  • Designed and developed InfoPath configuration utility. The configuration utility is a Microsoft InfoPath based application designed to handle a large amount of configuration data with complex hierarchical structure. The utility uses InfoPath’s scripting language (jscript) to interact with InfoPath’s document object model, validate configuration data and export the data into the destination XML.
  • Migrated data warehousing hub application III to production. During the migration process, multiple setup programs, ksh shell scripts and java/ant based application were developed to facilitate the deployment and operation. Training classes were developed and given to other team members.
Consultant, Confidential  (May 2004 - Nov 2004)
  • Served as "Subject Matter Expert" for the development of A Grants Reporting Tool (GRT). GRT is a mission critical web portal based on ASP.NET technology and Oracle database. Many solutions were provided for special features and performance enhancements.
  • Designed and developed BizTalk solution for the client’s invoicing system. It interfaces with backend legacy system using flat file format and interfaces with external trading partners using EDI X12 810, 864, 820 and 824. Biztalk 2004 is used to develop the solution. Send ports, receive ports, schemas, mappings, EDI base adapter and Biztalk orchestration are used to handle message routing, mapping, and trading process synchronization. Setup scripts are also developed to automate deployment process.
Consultant, Confidential (January 2002 - April 2004)
  • Designed and developed BizTalk messaging components to handle high volume XSLT transformation. It retrieves and sends XML message from/to MQSeries Queue 5.2 through BizTalk Adapter for MQSeries. Multiple servers were used to provide load balancing and failover. Various configuration factors were evaluated and fine-tuned to find and remove processing bottlenecks.
  • Designed and developed Close Acceleration Project (CAP) application. This is a financial application that provides the functionalities of configuration and operation of monthly close. The front-end was developed using Microsoft Studio .NET 2003 in C#. ADO .NET, web service and Crystal Report were heavily used. Oracle packages were heavily used for the database backend. Multi-Threaded model was used to enhance application performance.
  • Heavily involved in the design, development and operation of a large-scale data-warehousing application P3I. This application provides a centralized data hub for data loading, transforming, reconciling, archiving and data mart exporting of any XML based messages. The processing engine was developed using J2EE technology under Weblogic servers. MQ Series queues were used to provide high availability and asynchronous messaging. iPlanet LDAP server was used to provide centralized configuration information. XML, XSD and XSLT were heavily used to provide data validation, transformation and a common data layer.
Technical Lead Consultant, Confidential  (October 2002 - April 2003)
  • Designed four B2B connectivity projects using Microsoft BizTalk and led development team through full development cycle. The BizTalk projects serve as bridges between the client’s internal SAP system and external trading partners. The connectivity to external trading partners can be EDI based through EDI gateway Inovis, CIDX based through Elemica as trading hub, or RosettaNet based through direct http link. BizTalk orchestration and messaging are heavily used. XML transformation between the SAP IDOC, an internal defined XML format and CIDX XML format are frequently encountered. Business documents used in the system include Purchase Order (PO), PO Change/Cancel, PO Response, Invoice, Advanced Shipping Notice, Bill of Lading and Shipping Instruction.
Consultant, Confidential (September 2001 - December 2001)
  • Designed, developed and deployed B2B integration system using Biztalk messaging to handle mortgage insurance application and response with the client’s trading partners. The system was developed to handle the XSLT transformation between MISMO XML and the client’s proprietary flat file formats. It handles document routing, queuing, asynchronous delivery and certificate-based authentication. It allows additional trading partner to be added to the system through a configuration utility. It integrates with the client’s backend though AIC. Active/Passive clustering was used to provide high reliability and failover features.
Senior Principal Engineer, VerticalNet Inc. (March 2001 - September 2001)
Director of Development, VerticalNet Inc. (October 2000 - March 2001)
Senior Project Lead, VerticalNet Inc. (January 2000 - October 2000)
Project Lead, VerticalNet Inc. (June 1999 - January 2000)
  • Led a technical team to design, implement, and deploy four B2B integration kits on top of the SI system. They are Biztalk to Biztalk kit, webMethods to webMethods kit, EDI kit and generic kit. The kits provided packaged solutions to jumpstart the B2B integration between VerticalNet and its trading partners. All four kits include setup application on both VerticalNet side and its trading partner side. The BizTalk to BizTalk kit uses Microsoft reliable envelope to achieve guaranteed delivery and message routing, https for transport and encryption and digital certificate for authentication. The webMethods to webMethods kit uses its built-in mechanism for message routing, guaranteed delivery and security integration. In the EDI kit, EasyAccess 2000 is used to facilitate integration with IBM VAN. Administration tools were also provided for trading partner management, process template definition and automatic system setup for a given trading partner. Visual Basic, Microsoft SQL Server, Biztalk server, webMethods, EasyAccess 2000, EDI/VAN, ASP and XML were used.
  • Led a technical team to design, implement, and deploy VerticalNet Order Management Fulfillment (OMF) system and Supplier Integration (SI) system. The OMF system manages purchase order life cycles. The SI system enables electronic document exchange between VerticalNet and its trading partners. The systems were built in http/XML based, loosely coupled architecture to allow enterprise level integration of heterogeneous systems. The systems were designed and developed with features like guaranteed delivery, high scalability, full redundancy, integrated security, transaction and automatic document routing. Yantra was used as OMF platform and Biztalk server was used as the central messaging server. Visual C++, Visual Basic, Visual J++, Microsoft SQL Server, webMethods, EasyAccess 2000, XML, XSL, DTD, EDI/VAN and SOAP were used. Microsoft Project was also used for project management.
  • Designed internal EAI and external B2B connectivity framework for the VerticalNet eXtended platform. Implemented the B2B connectivity part of the framework. The system was designed to handle the connectivity to an Enterprise Information System (EIS) using JCA adapters or webMethods adapters. It provided message queuing using JMS compliant queue. It provided content-based message routing using a router manager and routers. It provided secure and guaranteed delivery using the combination of the JMS queue and B2B integration tools such as webMethods B2B server. J2EE/Java, EJB, MDB, stateless session bean, Weblogic 6.1, JMS queue, webMethods B2B server and Oracle 8.1 were used.
  • Defined VerticalNet schemas for Purchase Order (PO), PO Response and Advanced Shipping Notice (ASN). The schemas were derived from the core elements of the corresponding business documents in EDI X12, OAG, RosettaNet, cXML and CBL standards.
Senior Software Engineer, Users Inc. (June 1997 - June 1999)
  • Designed, developed, deployed and supported Internet home banking web application Personal Credit Union (PCU). Visual Basic 5.0, Visual InterDev 6.0, HTML, JavaScript, VBScript, asp, Internet Information Server (IIS) and COM were used.
  • Designed, developed, deployed and supported credit union intranet web site DataSafe Navigator.
  • Designed, developed, deployed and supported Users’ online loan application for credit union online user WebLoan. Symantec Visual Cafe) and java 1.02 were used.
  • Designed, developed and deployed COM/DCOM based three-tier architecture framework. MUMPS database was used as the database tier. A data server component was implemented as a MTS resource dispenser for database connection pooling. It creates disconnected ADO recordsets as data return and serves as the data tier. COM objects were developed as the business logic tier. ASP page and/or ActiveX components were used as the presentation tier. The stability, scalability and performance of the framework were stress tested. COM/DCOM, Microsoft Transaction Server (MTS), Visual C++ 6.0, Active Template Library (ATL), multi-threaded programming, synchronization, queuing, pooling and socket programming were used in the development.
  • Designed, developed and deployed Users’ Lending Navigator, a large-scale application built on top of the three-tier architecture framework. Skills included ActiveX document, ActiveX control, Visual Basic 6.0 and digital signing, MTS, COM/DCOM, Visual C++ 6.0 and ATL.
Consultant, Enhanced Communications Corporation. (November 1996 - April 1997)
  • Designed and developed an Internet based system for voice notification of emails. A java applet allows a user or an administrator to configure and test the individual notification preferences. The server application is scheduled to periodically retrieve email headers through POP3 and notify the corresponding users by telephone call using a voice card. Skills included Visual Basic 4.0, HTML 3.0, CGI, JavaScript and java applet programming, Oracle7 database table design and database stored procedure scripting.
Project Manager, Philadelphia Financial Group (March 1996 - November 1996)
  • C/Unix programming for the back office software of an insurance agent supporting system. Development was done on a Pyramid mainframe computer running Unix operating system. Unify relational database is used through its backend database library.
  • Led a technical team to develop an Insurance Communication Network (ICN) Intranet System using CGI based web pages.
Programmer/Analyst, Electronic Payment Services Corporation (June 1995 - March 1996):
  • Designed and developed a complete banking adjustment system in a client-server architecture. Borland Delphi was used on the client side and Oracle on the server side.
  
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