Lead Software Developer/Architect Invented "System and Method for Online Shopping Optimization," a USPTO patent combining Operations Research and Information Technology. Its DoD EMALL implementation was estimated to save up to 18%. Architect and hands-on lead developer of Davinci - Physics-based simulation tool for aircraft conceptual design, Wright-Patterson Air Force Base MILSTRIP Order Entry System - the largest mission critical J2EE application hosted at DoD EMALL (https://dod-emall.dla.mil), processing more than half of total EMALL revenue Diverse software development and leadership experience plus unique problem solving capability
Database: SQLite3, Oracle, MySQL, Microsoft Access, SQL Server, Toad, SQL.
Enterprise Integration: WebLogic Integration.
Director of Technology January 2013 to CurrentFlairsoft Ltd － Dayton, OH
Systems Engineer, Principal September 2010 to January 2013ManTech International US Navy TacMobile Information Assurance, SPAWAR － North Charleston, South Carolina
Technical Director February 2004 to May 2010ICF International － North Charleston, South Carolina
Sr. Information Engineer May 2003 to February 2004Modulant － Charleston, South Carolina
Data Processing and Querying Technical Support, Finance Department, SPAWAR Systems Center at Charleston Accomplishments Developed automatic credit card transaction correction system in Shell Scripts, saving significant amount of labor Enhanced daily database merge uploading/downloading system with better compression algorithms, resulted 50% increase in performance Redesigned, enhanced, and overhauled the UNIX shell scripts for daily database uploading and downloading between US Navy and SPAWAR System Center at Charleston Technologies Used Unix Shell Scripts, SQL, Oracle Database, HTML, PHP, Apache.
Financial Engineer May 1997 to May 2002InteliData Corp － Charleston, South Carolina
Analyst May 1994 to March 1997Metron, Inc － Reston, Virginia
Mathematical Programming and Analytical Research and Development Accomplishments Formulated decomposition and unfairness minimization mathematical programming models for the FAA Air Traffic Ground Delay Program Designed, formulated, and implemented nonlinear programming models for Metron Trading System in MatLab and C to maximize the gain of trading futures considering transaction costs and limiting trading risk at specified level Developed and implemented a scheduler using scheduling heuristics, constraint propagation, and tree search to optimally schedule factory floor activities in ILOG Solver and Scheduler Technologies Used C, MatLab, ILOG Solver and Scheduler, Statistics, Mathematical Programming OPEN SOURCE SOFTWARE DEVELOPMENT Personal Financial Planning and Simulation Accomplishments Invented Lifecastor - a personal financial planning calculation engine written in Ruby to simulate multi-period cash flows till life expectancy - a standalone command-line operated tool Modeled the uncertain income, expense, inflation with realistic probabilistic distributions Constructed the multi-period personal financial planning problem as an Objected-Oriented computer simulation Designed and structured a prototype web application of Lifecastor in Ruby on Rails Technologies Used Ruby, Ruby on Rails, Rake, MVC, REST, ActiveRecord, TDD, RSpec, Capybara, Guard, Spork, Git, GitHub, Assembla, JQuery, CSS, Sass, Bootstrap, Heroku, SQLite3, PostgreSQL, Cloud Computing, Mobile Development, Andoid, Ruboto.
Ph.D : Operations Research, 1994Georgia Institute of Technology － Atlanta, GeorgiaOperations Research
M.S : Operations Research, 1989University of Alabama － Tuscaloosa, AlabamaOperations Research
M.A : Applied Mathematics, 1982East China Institute of Technology － Nanjing, ChinaApplied Mathematics
CompTIA Security+ Certification
SEI Certified PSP (Personal Software Process) Developer
Lifecastor," John Zhu, Computer forecast and simulation for Personal Financial Planning, 2012 System and Method for Online Shopping Optimization," John Zhu and Jonathan Brown. US Patent Publication 2012/0072303 A1, US Patent & Trademark Office, September 12, 2011 Requisition Made Easy," John Zhu. Military Logistics Forum, Volume 3, Issue 10, Nov. 2009 Shopping Optimization," John Zhu. Presentation at the DIALOG 2008 - IBM ILOG User Conference, Palm Springs, CA, Feb. 24-26, 2008 The Aircraft Rotation Problem," John Zhu, Lloyd Clarke, Ellis Johnson, and George Nemhauser. Annals of Operations Research, Volume 69, Pages 33-46, Jan. 1997
Current Secret Security Clearance