Meet the Judges


Dario Mischener: Head of the Orientation of Communications and Information Technology – ICT – ORT Technical School, Argentina Department, first prize in the contest "Use of new information technologies in education", organized by Telefónica Foundation, a training travel on NTI in Madrid, Spain.  I received the Prize – Intel for “Excellence in Education: Innovation in the use of Technology within the Classroom.”  I was selected from the Nagoya University to participate in Nagoya, Japon for the G30 program.

Juan M. Irungaray has undertaken System Engineering Studies at Universidad Austral. He is Certified Scrum Master from Scrum Alliance. Bilingual Project manager with 8+ years of experience in software Development, leading and managing projects of diverse industries from the private sector such as travel, gaming, medicine, E-Commerce, Grains & Biodiesel & NGOs. Has worked for multinational companies such as Globant, Softtek and Thomson Reuters where he is currently Project & Release Manager. Also, leads Buenos Aires’ Google’s Technology User Group oriented to promoting technology in Latin America.


Marcus Schappi is the founder of the Little Bird Company ( During his spare time Marcus enjoys tinkering with electronics, building mobile apps and skiing.

James Giang is an organizer of the Android Australia User Group , Android advocate and hobbyist developer.

John Scott is a Sydney GTUG organiser, Android Australia User Group organiser, CTO of StudyLink, and is crazy about Android development.

Tom Horn is an Australian software developer. He is fascinated by maps and their ability to transport us, in time and space. He believes in Science and its power to transform our lives. He is above all an enthusiast.

Justin Clayden is an animator, musician, software engineer and microelectronics enthusiast.  He enjoys writing apps for Android, iOS and Arduino.  He is watching Futurama as he writes this.


David Marques

is an experienced mobile industr software engineer, Opensource developer and community supporter. Currently, he is developing state of art Android software for the education market.

Luis Leão has been a web developer for over 10 years, currently developing interactive projects that integrate physical objects and social APIs. He is the creator of sms2blog, the first Twitter SMS gateway in Brazil.

Renato Mangini is a developer and entrepreneur, founder and coordinator of GTUG-BH and enthusiast of everything that integrates software with the real world. He is the proud coach of the Brazilian winner robot soccer team back in the 90's.

Rogerio Moraes earned a B.S. in Computer Science at Universidade Federal de Minas Gerais, and is currently developing hardware and software for the iMXT Android tablet.

Vinicus Senger has been a software developer for the past 20 years. He is the founder of Globalcode (training company) and Eletron Livre (opensource hardware development). He has experience in Java, Java EE, C/C++, software architecture, Arduino, robotics and hardware development.

Czech Republic

Josef Prusa
is a 3D printer RepRap developer and Open Source Hardware evangelist.

Josef Slerka is a Chief Technology Strategist at Ataxo and head of New Media Studies at Charles University.


Mustafa K. Isik is an ultrageek and happy hacker, a programming language aficionado, electronic gaming connoisseur and maker of things composed of bits & atoms. His work is well documented all over the web.

Nikolai Onken has been working on accessing hardware in JavaScript for the past two years. If rumors are proven right, he built the first web-based application accessing a heart rate monitor via Bluetooth through a JavaScript API.


Amnon Dekel thrives at the intersection of novel human computer interaction, information technology, digital media and university lecturing. He has a PhD in Computer Science from the Hebrew University and serves as the Chairman of the Software Engineering Department at the Shenkar College of Engineering and Design.

Rafael Mizrahi is the CEO of Feng-GUI, and a passionate researcher of the aesthetics of visuals and sound.In his spare time, Rafael organizes and participates in creativity events and the GarageGeeks community.

Michael Vakulenko is a Research Partner at VisionMobile. He has been working in the mobile industry for over 16 years, starting his career in wireless in Qualcomm. Michael has a broad experience across many aspects of the mobile industry, including smartphone ecosystems, mobile services, handset software, wireless chipsets and network infrastructure.


Egawa Takashi is a Japanese freelance software developer. He is one of a Google API Expert (Android) in Japan. His heart is in Android, Erlang and Ruby especially.

Masahiko Adachi (a.k.a. adamrocker) is an Android developer. He has developed a Japanese input method named Simeji over 2 years.  Simeji got over 1M download. His mission is to continue to expand the users of Android in Japan.

Russia & CIS

Roman Kharkhalis was born in 1974 in Lviv, Ukraine. He has an engineering background (Radio Engineer, post-graduate in Computer Science) in leading technical universities of Ukraine. Since 1998, he has made a stellar journalist career with ITC Publishing.  From 2004-2009, he held the position of Editor-in-Chief in Mobility, where he has tested and evaluated practically every Android smartphone in Ukraine. In late 2010, he joined PocketBook, the burst-growing Ukrainian e-Reader vendor to implement the experience and vision of Android devices in the company's upcoming tablet lineup.

Andrii Iasynetskyi
is a software engineer from Mountain View--a web and Android enthusiast. He is a developer of Audiko for Android ( He has been a co-coordinator of the Kiev GTUG Center in the past. He has also been the winner of a few hackathons and contests in Android and Chrome.

Roman Mazur is the head of the Android/Java Unit at Stanfy and a Kyiv Center GTUG member.  He loves his wife and programming contests.

Yevgeniy Shutilin has started his career as software engineer and then switched to business development in IT. Interested in Agile methodlogies, design of interfaces and generation smart simple ideas. Yevgeniy coordinates Almaty GTUG.

Alexander Kipar is a mobile software engineer with experience in several mobile java platforms: Android, Blackberry and J2ME. As most Android developers, he is passionate about platform UI and interested in its evolution.