, www.khaoticen.com Khaoticen is a technology risk and information security company with more development departments headquartered in Serbia with strong presence and operations on the territories of Russian Federation, Central and East Europe, Middle East and Africa. The company has served numerous enterprise and government customers around the globe. We are constantly growing and are ready to welcome technology inspired visionaries and professionals streaming to deliver innovation and advancement. qVortex, a development department of Khaoticen, is cooperating with multinational companies, government agencies and law enforcement authorities worldwide. We are looking for talented candidate to join our team in Belgrade in the development of ultimately secure video, audio, file, screen and chat telecommunication application software for various telecommunication devices and telecommunication services, based on the integration of Qvortex ultimately secure telecommunication technologies with existing client platforms or enhanced open source software. VoIP (Voice over IP) EXPERT – full time job Ideal candidate needs to have:  Active knowledge of VoIP services and SIP protocol  Experience with open source VoIP applications and services (Kamailio, Asterisk, FreeSwitch)  Experience with NAT traversal methods and protocols (STUN, TURN, ICE)  Understanding of feature delivery in hosted VoIP environment (hosted services, SIP trunking, PRI trunking, enhanced business features, etc.)  Understanding of VoIP protocols, SIP signaling with emphasis on RTP and SDP, network QOS, IP routing, Ethernet switching and packet tagging mechanisms  At least 1 year professional application programming (C/C++ and Java)  Ability and desire to learn and teach  Ability to interface well with customers (internal and external)  Must enjoy the challenge of technical concepts and possess the ability to communicate those concepts at varying levels  Team spirit, but also ability to work indenpendently if needed  Good communication skills, flexibility and problem solving skills  Ability to work in team oriented project management environment  Self-motivated and ability to learn from professional literature  Ability to present information concisely and identify key issues clearly  Analytical skills and creativity and innovative attitude  Fluency in English Advantages:  Professional in application design and programming (3 year experience with application programming C/C++ and Java)  University degree in Computer Science or ICT module (BSc , MSc expected)  Familiar with Test Driven Development and knowledge of some of the source code versioning systems (Git, SVN, CVS)  Object Oriented Design and Analysis techniques and experience with OO languages (C++ and Java)  Knowledge of software development cycle and tasks with dedication to writing clean and safe software code  Working experience with HTML, CSS, XML, JSON, Javascript, JQuery, Perl and/or PHP  Multiplatform programming (Windows, Linux, Mac OS X, Android)  Experience in ICT security (certification in security will be considered as an advantage)  Experience in designing, installing and maintaining secure IP networks  Software optimization and customization  Software integration Offer:            Competitive salary Full time job, paid vacation, performance based bonuses International projects Social and health insurance taken care of Professional learning and ability for certification with references in good projects Team work, good organizational behavior, knowledgeable and reliable management Friendly and relaxed atmosphere Fully stocked kitchen, good catering A-class office building in quiet residential part of Belgrade, with private park and nice view Small teams and individual offices Reserved parking space Location: Belgrade, Kronštatska 5, with option to travel for professional courses If you are interested and qualified in this position please send your CV in English with the subject ”VOIP EXPERT 1504US” to careers@khaoticen.com All applications received by 15.04.2015. will receive full consideration. Only shortlisted candidates will be interviewed.