Ondrej Hirjak

For seven years, I've worked on various parts of a complex casino management system codenamed TBO. The system is successfully serving hundreds of thousands of players around the globe and running on thousands of machines.

WORK DONE
• Implemented player management and tracking module.
• Designed, implemented, and operated a distributed jackpot module.
• Developed a new communication layer between slot machines and casino system.
• Consulted, developed and supported deployment and operation of a casino system for a number of clients all around the world.
• Co-designed homegrown tools for deployment and configuration management.
• Led the development and integration of custom HW embedded modules in a casino environment, most notably the "SAS over IP" custom SMIB (slot machine interface board).
• Analyzed and prototyped new features and integrations of a casino management system.

Technologies: Java, Spring, C++, Qt, Protobuf, Oracle, PostgreSQL, Ansible

For CashBox, I led the development of custom ATM-like machine for casinos environment.

WORK DONE
• Analyzed and designed the solution.
• Oversaw the development of the front- and back-end of the server and embedded HW integration part.
• Set up the deployment and supported the operation.

Technologies: Java, Dropwizard, C++, Qt, Protobuf, PostgreSQL, Ansible

While working for Unicorn Systems, I developed various parts of internet banking for the Slovakian bank, Tatra Bank. Most notably, I designed and implemented the graph components for the front end.

Technologies: Flex, Flash, Java

During my PhD studies, I implemented a basic real-time raytracing engine. Before that, during my university studies, I implemented real-time fluid simulation on GPU.

Technologies: C++, GPGPU, CUDA

While interning at NVIDIA, I developed new features and implemented bugfixes for a low-level Linux driver for their graphics cards.

Technologies: C, X11, OpenGL, Linux

Being a part of an extremely capable team of people, I worked on a high-speed peer-to-peer network developed for Cisco called Topos. I implemented various low-level modules and worked on integration layers between high-level components (written in Java) and low-level components (written in C).

Technologies: Java, C, Linux

In the process of migrating from old technologies, I also analyzed an old MS Access-based solution and implemented new reconciliation software for ING bank.

Technologies: C#, ASP.NET, Microsoft SQL

As a part of a complex parking solution for the city of Martin, I designed and developed a parking lot utilization management server.

Technologies: C++, MySQL, Linux

I've also developed various games based on the Cipher Engine. For level editing, I created my own Radiant-like level editor named PhaseONE.

Technologies: Cipher Engine, C++, OpenGL