Vatroslav Bodrozic, Developer in Zagreb, Croatia
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Vatroslav Bodrozic

Verified Expert  in Engineering

Multithreading Developer

Zagreb, Croatia
Toptal Member Since
January 15, 2015

Vatroslav has loved programming since the age of 12, spending nights designing systems in his mind and transferring them into code the next day. After 20+ years of programming experience, he still enjoys and looks for complex, well-designed projects where his passion can be fulfilled. He has 10+ years of professional experience, mostly in C++ on embedded/real-time systems, including a VoIP gateway, automation systems, cryptography, and more.


Xbox, PlayStation, C++, APIs, Game Development, Unreal Engine, Xbox Live, GDK, C
Envox Lab
Windows, Boost, Standard Template Library (STL), C++, Jira, Networking
InfoSec Global
BlackBerry, Linux, OpenSSL, Boost, Standard Template Library (STL), C++, Git...




Preferred Environment

Subversion (SVN), Visual Studio, Windows

The most amazing...

...thing I've created is an artificial intelligence algorithm for chess strong enough to win against most casual players that I built at the age of 19.

Work Experience

C++ Developer

2016 - 2022
  • Worked as a game engine developer for many games based on the game engine.
  • Ported games from Windows to numerous other platforms, including PlayStation, Xbox, Nintendo, Google Stadia, etc.
  • Organized all required resources and managed through to the certification processes.
  • Worked on optimization for high-level parts of the graphics engine.
Technologies: Xbox, PlayStation, C++, APIs, Game Development, Unreal Engine, Xbox Live, GDK, C

C++ Developer

2014 - 2016
Envox Lab
  • Worked on a distributed and scalable call center application in C++, STL, and Boost.
  • Provided support for hundreds of servers and thousands of agents.
  • Used the SIP protocol for session establishment over the internet.
  • Worked asynchronously in a multithreaded environment.
Technologies: Windows, Boost, Standard Template Library (STL), C++, Jira, Networking

C++ Developer

2013 - 2014
InfoSec Global
  • Developed a secure VoIP framework and protocol by using OpenSSL, C++, STL, and Boost.
  • Used the Elliptic Curve Diffie Hellman algorithm for shared key exchange.
  • Used AES 256, RSA 2048, SHA 256 and X509 certificates.
  • Used a proprietary protocol for establishing a secure connection and audio transfer.
  • Used TCP and UDP protocols for message transfer.
Technologies: BlackBerry, Linux, OpenSSL, Boost, Standard Template Library (STL), C++, Git, Cryptography, Networking, Encryption

CEO, Founder

2011 - 2014
  • Developed my own toolkit for Facebook development in ASP.NET and PHP.
  • Sold thousands of licenses for other developers and companies.
  • Facilitated an unlimited license purchase by Epic Games Inc. (Unreal Engine).
  • Worked as a consultant for Epic Games, Ferrari World, and other companies.
Technologies: PHP, ASP.NET, C#, JavaScript

C++ Developer

2008 - 2011
  • Created software used for testing of car engine prototypes of famous vendors (Mazda, Audi, Ferrari, etc.).
  • Worked with C++, STL, and Boost on embedded real-time OS and Windows.
  • Developed components working at 10k Hz inside a multi-threaded environment.
  • Allowed shared memory and OS messages to be used for communication between 2 operating systems.
  • Implemented design patterns, UML design and verification, unit tests, and code reviews.
Technologies: Windows, Standard Template Library (STL), C++

Java Developer

2007 - 2008
  • Worked on a central parking management system and company web portal.
  • Used Java Server Faces as a web framework, Hibernate as a data access layer, and Oracle 11.
Technologies: Oracle, Hibernate, JSF, Java

C++ Developer

2004 - 2006
  • Developed a VoIP gateway, specifically H.323 and SIP protocols.
  • Used C++ and STL on embedded real-time OS.
  • Used TCP/IP (including UDP) extensively on high call frequency.
  • Received numerous awards (monthly bonuses and salary increase) for my achievements at work.
  • Mentored and supervised seven new employees to bring them on-board with C++, TCP/IP, OS, and VoIP.
Technologies: Linux, TCP/IP, Standard Template Library (STL), C++, Networking

Facebook Toolkits

Created a toolkit that simplifies and speeds up development of Facebook applications. The stable interface reduces maintenance efforts affected by frequent changes in the Facebook API. It received excellent feedback by numerous developers and companies, including Epic Games Inc.

Chess Engine

I created my own artificial intelligence algorithm that was strong enough to win against most casual players (tested by my friends and myself).

Operating System

Startup code written in the boot sector that is used for starting an OS. The file table is used to store information about file positions on the disk. It includes functions for storing files on a disk, deleting, and renaming. Executable files can be executed from a command prompt. It includes support for resident programs.

Digital Circuits Simulator

This features two separate programs written in the C++ programming language, editor, and simulator. It supports basic logic gates, buses, special gates (one-way, two-way) and modules. It features acceleration of event-driven simulation based on usage of modules. It is tested on circuits of all complexities (from bistabil to simple microprocessor), and was suggested for a rectorial award.
1998 - 2004

Master's Degree in Computer Science

Zagreb University Faculty of Electrical Engineering and Computing - Zagreb, Croatia


Standard Template Library (STL), GDK, Facebook API, OpenSSL, REST APIs


Microsoft Visual Studio, Eclipse IDE, Visual Studio, Subversion (SVN), Git, LINQ to SQL, Jira


C++, C, C#, JavaScript, Java, PHP, CSS, HTML, SQL


ASP.NET, JSF, NHibernate, Boost, Hibernate, Unreal Engine


Xbox, PlayStation, Joomla, Android, Oracle, Linux, Windows, BlackBerry


Microsoft SQL Server, MySQL


Design Patterns, Real-time Systems


Xbox Live, PS4, Embedded Systems, TCP/IP, Multithreading, Game Development, Networking, SIP, APIs, Cryptography, Encryption

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