Ján Hrnko

  • 40D9 737E BA2B DD3E 0E31 31AB 4108 3825 3E04 C0A2

Certification

CCNA

Cisco Certified Network Associate Routing&Switching
2010-2016

CCNP

Cisco Certified Network Professional Routing&Switching
2013-2016

Languages

  • English (Fluent)
  • Slovak (Native)
  • Czech (Fluent)

Interests

  • Music
  • Ice hockey
  • Homebrewing
  • Cryptography

About me

Versatile IT engineer with passion for research/academics, cryptography and new emerging technologies that has experience in various fields of informatics, mostly networking (CCNP level), SDN and Linux systems. My expertise in networking and systems engineering comes from working in multivendor production environments and from studies and attending numerous lectures and extracurricular courses. One of my core motivations is to help others, resolving issues and sharing knowledge with colleagues. I attended several international conferences and held global webinars on SDN for an audience of ~200 engineers worldwide.

Experience

Consultant

Jun 2018 - Present
Prague (Czechia)

Network Engineer

Aug 2017 - Apr 2018
Jaguar Land Rover, Nitra (Slovakia)

Installing, implementing and interconnecting infrastructure in a massive greenfield project in cooperation with designers and colleagues from network and compute teams. Working with Cisco 3850, 4507, Nexus 9k, ASA5585, Aironet 3k and Linux.

Founder/SDN Network Engineer

Jan 2016 - Dec 2017
NextHop

Developing custom SDN applications for an international client. The apps leverage REST API and OpenFlow, running on HP switches and Open vSwitches controlled by HP SDN VAN Controller deployed on Ubuntu Linux server. Collaborating with HPE on developing new firmware for HP hardware switches capable of processing specific OpenFlow actions in ASICs.

SDN Network Engineer

Jan 2015 - Jan 2016
Hewlett Packard Enterprise, Bratislava (Slovakia)

Testing, developing, evaluating and enhancing cutting edge technologies and products for deployment.

  • Designing smaller pure and hybrid SDN deployments using HP VAN SDN Controller and OpenFlow enabled/capable hardware and software switches
  • Evaluating NFV, OpenDaylight and OpenStack implementations
  • Developing projects in Java, leveraging Linux tools and web languages

Lead Network Implementation Engineer

Dec 2014 - Jan 2016
Hewlett Packard Enterprise, Bratislava (Slovakia)

Promoted to a lead engineer responsible for a global internal HP project from technical perspective. Created and implemented a policy that became a world wide HPE standard for (re)configuration and devices to production.

  • Design and implementation of various changes and setups in production multi-vendor environment (Cisco, HP, Checkpoint, Fortinet, Riverbed, Juniper, and other ... ) on multitude of appliances
  • Design and implementation of health and performance monitoring, analyzing and troubleshooting
  • Providing information and consultancy to top level managers, project managers and engineers

Network Implementation Engineer

Feb 2014 - Dec 2014
Hewlett Packard Enterprise, Bratislava (Slovakia)

Working on one of the TOP priority global HP projects across all customer devices in all regions (EMEA, APJ, AMS).

  • Designing, management and implementation of network changes under ITIL in multivendor environment (Cisco, HP, Checkpoint, Fortinet, Riverbed, Juniper, and other vendors)
  • Implementing health and performance monitoring, analyzing and troubleshooting
  • Programming own custom tools improving the project
  • Performing migration of various network devices from different vendors to a new monitoring system
  • Analysing and troubleshooting customer network environment

IT Intern

Jun 2013 - Aug 2013
T-Systems, Kosice (Slovakia)

Worked as a part of 2nd and 3rd line support team. Helping with assessment of employee skills up to CCNP level – designed, developed and evaluated test scenarios.

Education

Master of Science in Information Systems / Information-Communication Networks

2011-2013
University of Zilina, Zilina (Slovakia)

Thesis: High availability platforms for real-time services.

Bachelor in Informatics

2008-2011
University of Zilina, Zilina (Slovakia)

Thesis: SIP multimedia solutions.

Skills

Computer networks

Routing&Switching, Wireless, Firewalls, Monitoring, VoIP, SDN (OpenFlow)

Operating systems

Linux servers (different flavours))

Programming

Java, Python, Bash, web languages, REST APIs

Network analysis

Packet capture (Wireshark, TCPdump) and flow analysis

Applications

Virtualization, High availability (Corosync, Pacemaker, DB replication), DNS, NTP, DHCP, Apache/Tomcat

Office

MS Office, LibreOffice suite

Databases

SQL (MariaDB, MySQL, Oracle)

Independent coursework and volunteering

CCNP ROUTE course

CCNP SWITCH course

CCNP TSHOOT course

CCNA 1-4

CSR and sustainability in the ICT sector conference at Universidad de Valencia, Spain

CSR and sustainability in the ICT sector conference at University of Debrecen, Hungary

ICT and sustainability at T-System Hrvatska, Croatia