Stefan Nikolov, Developer in Rousse, Bulgaria

Stefan Nikolov

Debugging Developer

Rousse, Bulgaria
Toptal Member Since
April 23, 2016

Stefan is a talented software engineer with over 5 years of professional experience in mobile games development (from porting, to creation, to team lead) and 10 years as back- and front-end web developer (from the earliest HTML+ASP to PHP5+MySQL+JavaScript+jQuery now)

Stefan is available for hire
Hire Stefan


Knowledge Based Intelligence
jQuery, JavaScript, MySQL, PHP
SAP IDoc, HIPAA Electronic Data Interchange (EDI), Subversion (SVN), Oracle SQL...


Rousse, Bulgaria



Preferred Environment

Apache HTTP Server, Git, TortoiseSVN, Visual Studio

The most amazing...

...thing I've developed is an accelerometer-driven music app for iOS with own low-latency sound mixer and compressor.

Work Experience

2015 - 2016

Open-Source Software Developer

  • Designed and developed the Behave3d library, a JavaScript library for dynamic behavior and animations of HTML elements.
  • Wrote complete documentation+examples of the library, available on a site which itself is a demonstration of the library's functionality (
Technologies: JavaScript
2010 - 2015

Web Developer

Knowledge Based Intelligence
  • Designed, developed, and supported a corporate training and testing system “Knowledge Based Intelligence,” used internally at Alliance Boots GmbH production sites in the UK.
Technologies: jQuery, JavaScript, MySQL, PHP
2010 - 2010

Software Consultant

  • Consulted for corporate clients on electronic document standards and their technical implementation on various networks (AS2, HTTP, IPX400, Tradanet, etc.). Wrote XSL transformations for different electronic data interchange formats (EDI, MRT, IDOC,…).
Technologies: SAP IDoc, HIPAA Electronic Data Interchange (EDI), Subversion (SVN), Oracle SQL, XSLT, XML
2009 - 2010

iOS Developer

  • Developed accelerometer-driven music applications.
  • Published titles YossBeats and YossGuitar.
  • Researched and developed gesture recognition via accelerometer data.
  • Developed a sound mixer + compressor achieving the lowest possible latency on an iOS device for playing (simultaneous) sounds, not using the standard API sound mixing.
Technologies: C++, Objective-C, Xcode, Adobe Photoshop, 3ds Max, OpenGL ES
2005 - 2009

Mobile Games Developer

  • Ported the program for the King Kong project. Technologies used: C, BREW on Visual Studio; SVN.
  • Ported the program for Platinum Solitare, Real Football 2007, Rayman 3, Gameloft Backgammon, Midnight Bowling, and Mystery Mansion Pinball projects. Technologies used: J2ME on JBuilder, Eclipse, SVN, Perl, and Python.
  • Created code for Diamond Rush, Rayman Kart, and The Settlers projects. Technologies used: J2ME on JBuilder, XML via DocumentBuilderFactory, SVN.
  • Led the development of CSI: Miami (iPod), Brothers in Arms: Hour of Heroes (iPhone), and Rise Of Lost Empires (iPhone) projects. Technologies used: C++ and ObjectiveC on Visual Studio and XCode, OpenGL ES, iPhone SDK, PowerVR SDK, XML (DocumentBuilderFactory), SVN.
Technologies: Subversion (SVN), OpenGL, JBuilder, Eclipse, Xcode, Visual Studio, Objective-C, C++, C, BREW, J2ME
2003 - 2005

Web Developer

CTS Media GmbH
  • Designed and developed a CMS in PHP4 + mySQL employed in projects of the company; developed site-specific modules for this system and other CMS (eZ Publish, MAXcms).
  • Designed and programmed CMS-based sites (mainly e-shops).
  • Created the graphical design of sites and UI elements.
  • Designed and programmed Flash animations (intros, trailers) and components (menus, maps, etc.).
Technologies: HTML, JavaScript, MySQL, PHP
2001 - 2003

Web Developer

  • Created business sites and programmed separate components like menus and Flash banners.
  • Participated in the graphic design for some of the projects.
Technologies: Adobe Photoshop, Flash, ASP, JavaScript, HTML


Author of an open-source library, written in JavaScript, for applying 3D transformations, animations, and scripting logic to HTML elements.



JavaScript, PHP, HTML, C, Objective-C, XML, XSLT, C++


jQuery, OpenGL, OpenGL ES, OpenCV, SDL


Debugging, HIPAA Electronic Data Interchange (EDI), SAP IDoc, Research & Critical Thinking




Visual Studio, TortoiseSVN, Git, Apache HTTP Server, Flash, Xcode, JBuilder, Subversion (SVN), Adobe Photoshop, 3ds Max


J2ME, BREW, Eclipse


MySQL, Oracle SQL


2002 - 2004

Master's Degree in Computer Science

Ruse University - Ruse

1998 - 2002

Bachelor's Degree in Computer Science

Ruse University - Ruse