Zoltan Dezso

Nationality: Hungarian

Email: dezso.zoltan gmail.com

Languages: English (TOEIC 980), Japanese (JLPT 1), Hungarian

Japan Visa Status: Working Visa (Engineer)

Six years work experience in web development, three in mobile
Five years work experience with Ruby
Three years work experience with C#.NET
Experience with databases and query optimization
Experience with systems administration
Solid background in computer science
Experience leading small teams
Experience with agile practices, such as Scrum or TDD

Work Experience

Pikkle, Inc., Tokyo, Japan

February 2011 - : Software Engineer

Mobile game development for various SNS platforms in Ruby on Rails and Objective-C for iOS

Ruby MySQL Amazon EC2

Developed Rody for I-SKY with AIIA
Worked on Restaurant City Mobile for Gree with EA/Playfish
Worked on Dragonball Battle Generation with Bandai Namco

3Di, Inc., Tokyo, Japan

June 2008 – January 2011 : Senior Software Engineer

Virtual world server and client development in C#.NET, C, C++, Ruby on Rails

C# C/C++ Ruby MySQL .NET Irrlicht Asterisk FreeSWITCH Amazon EC2

Developed VoIP module for virtual world server using C, C# using Asterisk/OpenSER and proprietary PBXs² &³
Worked on 3Di OpenSim, a virtual world server in C#
Worked on 3Di OpenViewer, a virtual world viewer in C++ and C#
Developed user behavior analysis tool in Ruby
Developed business metrics dashboard web application in Rails
Developed customized Amazon EC2 instances for Asterisk PBX and virtual world server and wrote scripts to configure servers without user interaction in Ruby
Installed and configured CI system (buildbot and jenkins)

AMU Records, Inc., Tokyo, Japan

September 2006 – June 2008 : Software Engineer

Official mobile site development in Ruby with PostgreSQL

Ruby PostgreSQL

Developed mobile site framework, now used on 30+ sites, including external clients’
Developed CMS framework
Developed reporting framework
Developed and maintained official mobile web sites for all carriers in Ruby with PostgreSQL
Deeply familiarized myself with CJK encodings and developed emoji conversion library deployed on 30+ sites
Developed mobile forum system, used on a popular J-POP artist’s official site
Administered 20+ linux servers
Optimized PostgreSQL installation and SQL queries
Interviewed and hired developers
Mentored and managed development team of six

Toshiba R&D Center, Kawasaki, Japan

September 2005 – September 2006 : Intern, Multimedia Laboratory

C/C++ C# Matlab

Researched techniques of analyzing laser-scanned 3D human models
Implemented model matching algorithm in Matlab and C#
Developed 3D visualization tool for the matching process
Designed and implemented a modified octree to speed up minimum distance calculation
Researched model dimensionality reduction using principal component analysis

Telefor, Inc., Hungary

April 2004 – September 2005 : Software Engineer (part time)

Telefor is a subsidiary of Hungary’s largest commercial TV station providing SMS/IVR voting solutions for such television programs as the local version of American Idol and provides contents for all national mobile carriers.

PHP Oracle

Developed internal reporting framework in PHP and Oracle/MySQL
Developed certified drawing (sweepstake) system
Done SQL query and database optimization, introduced materialized views to make reports previously taking overnight to run under a minute
Provided on-call support and maintenance of Linux servers during live television programs
Provided on-site support during extremely high-traffic (3000+ SMS/sec) live programs^[11]

Open-source activities and projects

Core developer of voipforvw voice chat client
Core developer of 3di-viewer-rei virtual world viewer
Developer of Wiimote plug-in for 3di-viewer-rei
Maintainer of irrlicht.net(cp), .NET binding for the irrlicht 3D engine
Contributed to opensimulator, a virtual world server
Contributed Hungarian translations to Ubuntu
Among top contributors of Hungarian translation for Grooveshark.
Simple befunge interpreter in Ruby
Skype ruby API Client for Mac OSX
Treasure Next Door a Startup Weekend project
Tokyo Metro Visualization
RubyKaigi attendee since 2008 and RubyKaigi Individual Sponsor in 2011

Certifications

2010 Ruby Certified Programmer (Gold)
2008 PostgreSQL Certified Engineer (PostgreSQL 8 Silver)
2007 Oracle Certified Associate DBA (Oracle 10g)
2007 Microsoft Certified Technology Specialist SQL Server 2005^[10]
2008 Microsoft Certified Technology Specialist .NET 2.0 Windows Applications^[10]
2007 Microsoft Certified Systems Administrator^[10]

Education

September 2004 –September 2006 (unfinished) PhD, Intelligent Systems

Budapest University of Technology and Economics, Hungary

September 1999 –June 2004 MSc, Information Technology

Budapest University of Technology and Economics, Hungary

Publications

Analyzing human motion using ultrasound-based motion capture (2004, MicroCAD, Hungary)
Efficient erasable watermark embedding in medical images (2004, INES)12
Motion Capture vs traditional medical examinations (2005, SETIT, IEEE)13
ExtSim: A Flexible Data Mapping and Synchronization Middleware for Scientific Visualization in Virtual Worlds (2010, Journal of Virtual Worlds Research)14

Notes

[10]: MCP ID: 3227008
[11]: The local version of American Idol is not named Hungarian Idol