Ondrej Hirjak，布拉迪斯拉发开发商，布拉迪斯拉发地区，斯洛伐克
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Ondrej Hirjak

Verified Expert  in Engineering

Software Engineer and Developer

Location
Bratislava, Bratislava Region, Slovakia
Toptal Member Since
February 5, 2019

Ondrej是一名软件架构师，拥有技术管理技能和19年以上的航运项目经验, 从底层内核驱动和GPU计算到高速点对点网络以及企业金融和游戏应用. He has hands-on experience in the software development lifecycle, from ideas to live operations, focusing on high-level architecture, design, and management. Ondrej在他拥有所有权并从头到尾交付项目的项目中茁壮成长.

Software EngineeringJavaGitCC++MultithreadingJiraConfluenceBashLinuxApache MavenSourceTreeDevOpsSQLAnsible

Portfolio

Wincent
FIX协议、Rust、Kotlin、Amazon Web Services (AWS)、Trading、Python...
Blockchain projects
TypeScript、卡尔达诺区块链、去中心化交易所(DEXs)、区块链...
Vnet-Services GesmbH
Ansible, PostgreSQL, Oracle, Protobuf, Qt, c++， Java，技术领导...

Experience

Software Engineering - 19 yearsJava - 12 yearsSoftware Architecture - 7 yearsDevOps - 7 yearsSQL - 6 yearsKotlin - 4 yearsTeam Leadership - 3 yearsRust - 1 year

Availability

Full-time

Preferred Environment

Linux, MacOS

The most amazing...

...我参与的项目是一个复杂的赌场系统，服务于全球成千上万的玩家，运行在数千台机器上.

Work Experience

Senior Software Engineer

2022 - 2023
Wincent
  • Developed an OTC platform for a major crypto market maker.
  • 参与团队之间的沟通，以支持平台的未来扩展.
Technologies: FIX协议、Rust、Kotlin、Amazon Web Services (AWS)、Trading、Python, Cryptocurrency, Trading Systems, Kubernetes, Apache Kafka

Head of Development

2022 - 2022
Blockchain projects
  • Oversaw product and software development of DEX on Cardano.
  • 管理三个软件工程团队，每个团队大约五人.
  • Provided product guidance, marketing, and top management support.
Technologies: TypeScript、卡尔达诺区块链、去中心化交易所(DEXs)、区块链, Team Leadership, Technical Leadership, CTO, Amazon Web Services (AWS), JavaScript, Cryptocurrency

Software Architect | Senior Software Engineer | IT Consultant

2012 - 2018
Vnet-Services GesmbH
  • 实现了一个赌场管理系统的玩家管理与跟踪模块.
  • 设计、实现并操作赌场管理系统的头奖模块.
  • 在老虎机和赌场系统之间安装了一个新的通信层.
  • Consulted, 为许多国家的许多客户开发并支持赌场管理系统的部署和运营.
  • 共同设计用于部署和配置管理的本地工具.
  • 领导开发了一种新的类似atm的机器，用于赌场环境.
  • 管理赌场环境中定制硬件模块的开发和集成.
  • 分析和原型的新功能和集成的赌场管理系统.
Technologies: Ansible, PostgreSQL, Oracle, Protobuf, Qt, c++， Java，技术领导, CI/CD Pipelines, JavaScript, Python, Multithreading, Team Leadership

Software Architect

2011 - 2011
Unicorn Systems s.r.o.
  • 为Tatra银行定义软件架构并开发网上银行.
  • 设计并实现了网上银行绘图组件.
Technologies: Flash, Flex, Java

Senior Software Engineer

2009 - 2011
Tempest a.s.
  • 设计并实施斯洛伐克电子收费系统中执法模块的部分内容.
  • 监督斯洛伐克电子收费系统的组件测试.
Technologies: Linux, Windows, MySQL, Java

PhD Student, Teaching Assistant

2009 - 2010
斯洛伐克科技大学信息学和信息技术学院
  • Worked on a real-time ray-tracer on GPU.
  • Supervised students with their bachelor's theses.
Technologies: NVIDIA CUDA, GPGPU, C++

Software Engineer Intern

2008 - 2008
NVIDIA
  • Developed low-level Linux driver for NVIDIA graphics cards.
  • 帮助实现Quadro产品线的尖端功能.
Technologies: Linux, OpenGL, X11, C

Software Engineer

2006 - 2008
Tempest a.s.
  • Worked on high-speed peer-to-peer network developed for Cisco.
  • Implemented various low-level modules.
  • 负责Java编写的高级组件和C编写的低级组件之间的集成层.
Technologies: Linux, C, Java

Software Engineer

2005 - 2006
Digital Systems s.r.o.
  • Designed and implemented reconciliation software for ING bank.
  • Built a SWIFT system for banking sector.
  • Developed the back-end for T-Com Games T-Station.
技术:Linux, c++， Oracle, MySQL, Java, Microsoft SQL Server, ASP.NET, C#

Software Engineer

2004 - 2005
Isotoxin Industries s.r.o.
  • Implemented various games using the Cipher Engine.
  • Created our own Radiant-like game editor.
  • 设计并实现了一个停车场利用管理服务器.
技术:Linux, MySQL, OpenGL, c++，游戏开发，游戏引擎编程

Casino Management System

七年来，我一直致力于代号为TBO的复杂赌场管理系统的各个部分. 该系统成功地为全球数十万玩家提供服务，并在数千台机器上运行.

WORK DONE
• Implemented player management and tracking module.
•设计、实现并运行分布式头奖模块.
•在老虎机和赌场系统之间开发了一个新的通信层.
• Consulted, 为世界各地的许多客户开发和支持赌场系统的部署和操作.
•共同设计用于部署和配置管理的本地工具.
•领导赌场环境中定制硬件嵌入式模块的开发和集成, 最引人注目的是“SAS over IP”定制SMIB(老板机接口板).
•分析和原型化赌场管理系统的新功能和集成.

技术:Java, Spring, c++， Qt, Protobuf, Oracle, PostgreSQL, Ansible

CashBox

在CashBox中，我领导了针对赌场环境定制的类似atm机的开发.

WORK DONE
• Analyzed and designed the solution.
•负责服务器前端、后端及嵌入式硬件集成部分的开发.
• Set up the deployment and supported the operation.

技术:Java, Dropwizard, c++， Qt, Protobuf, PostgreSQL, Ansible

Tatra Bank Internet Banking

While working for Unicorn Systems, 我为斯洛伐克银行开发了网上银行的各个部分, Tatra Bank. 最值得注意的是，我为前端设计并实现了图形组件.

Technologies: Flex, Flash, Java

Graphics and GPU Programming

http://hirjak.io
在我的博士研究期间，我实现了一个基本的实时光线追踪引擎. 在此之前，在大学期间，我在GPU上实现了实时流体模拟.

Technologies: C++, GPGPU, CUDA

NVIDIA GPU Linux Kernel Driver

While interning at NVIDIA, 我为他们的显卡开发了一个低级Linux驱动程序的新特性并实现了错误修复.

Technologies: C, X11, OpenGL, Linux

High-speed Peer-to-peer Network

Being a part of an extremely capable team of people, 我在为思科公司开发的高速点对点网络Topos上工作. 我实现了各种低级模块，并致力于高级组件(用Java编写)和低级组件(用C编写)之间的集成层。.

Technologies: Java, C, Linux

Recopay

In the process of migrating from old technologies, 我还分析了一个旧的基于MS access的解决方案，并为ING银行实现了新的对账软件.

Technologies: C#, ASP.NET, Microsoft SQL

Parking Lot Utilization Management Server

As a part of a complex parking solution for the city of Martin, 我设计并开发了一个停车场利用管理服务器.

Technologies: C++, MySQL, Linux

Cipher Engine Games and PhaseONE Level Editor

I've also developed various games based on the Cipher Engine. 对于关卡编辑，我创建了自己的类似radiant的关卡编辑器，名为PhaseONE.

Technologies: Cipher Engine, C++, OpenGL

Languages

Java, C, C++, SQL, Bash, C#, UML, Kotlin, Rust, JavaScript, Python, Scala, XML, Assembler, TypeScript

Tools

Git, SourceTree, Jira, Confluence, Subversion (SVN), Apache Maven, Ansible, IntelliJ IDEA, Flash, Perforce, Qt Creator

Other

Software Engineering, Embedded Software, TCP/IP, Analysis, Consulting, Team Leadership, Prototyping, Software Architecture, Software Design, FIX Protocol, Technical Leadership, Multithreading, X11, Design, Device Drivers, Integration, Game Development, Game Engine Programming, SOAP, Cardano Blockchain, Decentralized Exchanges (DEXs), CTO, CI/CD Pipelines, Trading, Cryptocurrency

Libraries/APIs

MyBatis, Protobuf, OpenGL, jQuery

Paradigms

DevOps, Agile Software Development, Scrum, Kanban, Object-oriented Programming (OOP), Functional Programming, GPGPU

Platforms

Linux, MacOS, Oracle, NVIDIA CUDA, MS-DOS, Windows, Android, Azure, Embedded Linux, Docker, Blockchain, Amazon Web Services (AWS), Kubernetes, Apache Kafka

Frameworks

ASP.NET, Flex, Spring, Dropwizard, Qt, .NET

Storage

MySQL, Microsoft SQL Server, PostgreSQL

Industry Expertise

Trading Systems

2009 - 2010

PhD (Unfinished) Degree in Software Engineering

Slovak University of Technology - Bratislava, Slovakia

2006 - 2008

Master's Degree in Software Engineering

Slovak University of Technology - Bratislava, Slovakia

2002 - 2006

Bachelor's Degree in Software Engineering

Slovak University of Technology - Bratislava, Slovakia