Hi, I am Jan

IT enthusiast

I'm deeply passionate about all IT things, particularly hacking, computer networks, GNU/Linux, the thrilling world of Bug Bounty programs and CTF challenges. I take great pleasure in navigating the complexities of cybersecurity, consistently honing my skills to fortify digital landscapes.

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About me

My introduction
about me image

I acquired my first experiences in high school, where I specialized in computer network administration. Then I continued my studies at the Faculty of Information Technology at the Czech Technical University (CTU) focusing on Information Security. During my studies, I gained experience in e-commerce at Alza, which gave me a new perspective on the dynamics of the business environment. I also devoted time to assembling and servicing computers, which provided me with practical skills and a better understanding of user needs. Furthermore, I expanded my education on platforms such as TryHackMe (currently in top 2%) and PortSwigger Academy, where I developed my skills in cybersecurity.

6+ Years of
experience
100+ CTF challenges
completed
5+ Bug Bounty
bugs found

Skills

My technical level

Networking

More than 6 years

TCP/IP

98%

Switching & Routing

92%

DNS, DNSSEC, DynDNS

85%

Firewalls, IDS/IPS

80%

Wireless networks

90%

VLAN

95%

VPN technologies

84%

Cisco

76%

GNU/Linux

More than 5 years

File system

98%

Access rights

95%

Processes and threads

80%

Sudo, ALC, PAM, RBAC

84%

Disk administration, RAID, swap

95%

UFS, ZFS, NFS

75%

Priorities, limits, quotas

80%

Hacking

More than 4 years

Web security

85%

Wireless security

90%

Operating systems

80%

Active Directory

74%

Web Development

More than 4 years

HTML

90%

CSS

95%

JavaScript

70%

Bootstrap

98%

Qualification

My journey
Education
Work

Soukromá střední škola výpočetní techniky

Prague
2018 - 2022

CCNA: Switching, Routing and Wireless Essentials Certification

Prague
2021

Autodesk Inventor Professional 2021 Certification

Prague
2021

Fakulta Informačních Technologií ČVUT

Prague
2022 - 2024

Internship at Softcom

Prague
2021

Alza

Prague
2023

NOVÁ TROJKA z.s.

Prague
Since 2022

Stellumo s.r.o.

Prague
Since 2023

Services

What do I offer?

Frontend
Developer

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Frontend
Developer

  • Responsive design.

  • Interactive user interface.

  • Performance optimization and accessibility.

  • Cross-Browser compatibility.

Backend
Developer

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Backend
Developer

  • Database systems.

  • Security and scalability.

  • Caching and performance optimization.

  • Monitoring and logging.

Computer
Repair

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Computer
Repair

  • Diagnostic and Troubleshooting.

  • Repairs and Maintenance

  • Software and Hardware Upgrades.

Portfolio

Most recent work
ToDo_Application.png

ToDo-Application

ToDo application written in HTML, CSS and JavaScript. Application is hosted here and data are loaded into browser. Data is not sent anywhere and everything happens locally in your browser.

Demo
PasswordGenerator_WebApp.png

Password Generator Web Application

Password Generator application written in HTML, CSS and JavaScript. Application is hosted here. Everything happens in the browser. Data is not sent anywhere and everything happens locally in your browser.

Demo
PasswordGenerator_PythonApp.png

Password Generator Python Application

Password generator is a program written in Python, it is intended for secure password generation.

Demo

Do you have a new project?

Contact me now.

Contact me  
project image

Contact me

Get in touch

Email

jan.flaska@gmail.com

Location

Czech Republic - Prague