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About Me

I am an IT enthusiast who independently hosts and administers services used on a daily basis – from file servers to containerized and cloud-based solutions. In my free time, I systematically expand my knowledge of IT infrastructure, system security, and process automation. My passion for learning and deep technological curiosity drive me to continuously improve my skills and explore advanced solutions. I find particular satisfaction in projects that allow me to combine theory with practice and develop skills in real environments. I believe that working independently on complex systems is not only an excellent way to learn but also the key to innovative approaches in professional activities.

Certifications

MTCNA, CCNA ITN, CCNA R&S, Cambridge B1, 3CX basics, Sophos Engineer, Docker Essentials IBM, EE10, EE11

Professional Experience

• IT Engineer – TTCOMM (2023–present)
  • Migration of Active Directory domain, email, and services to the headquarters in Germany
  • Migration of the iDirect satellite network to a new version and system redesign using MikroTik
  • Building a network balancing system for the project Gextrecs.space
  • Conducting networking training
  • Preparing technical presentations of products and solutions
  • R&D to find new technical solutions and conduct research and tests
• PM-Digital – 2nd line of support (2022–2023)
• Migration of Active Directory domains
• Migration of hosting (email and websites) from external providers
• IT support for municipal offices, production, accounting offices, and other entities
• Conducting cybersecurity and Office 365 training
• Freelancer on the Useme platform (2021–2023)
• Conducting custom training sessions
• Preparing task automation scripts on request
• Preparing video tutorials
• Institute of Electrotechnics in Międzylesie (2021)
• Introduction of a central contract register in MS Access
• Helpdesk
• Consulting on security issues
• Tutor online and in-person (2017–present)
• IT and electronics tutoring for university students and high school students
• Preparing educational materials and meetings
• Recording and possibly editing meeting videos

Education

• Warsaw School of Computer Science – Computer Engineer, specialization in Cybersecurity (2022–2026)
• 2-year course in GPON fiber optic network design (2020–2021)
• Technical School of Communication in Warsaw – Telecommunication Technician (2018–2022)
• Python programming course for high school students at WWSI (2019)

Initiatives, Achievements, and Conferences

• Precision Assembly and Soldering Championships (2021)
• Marshal of the Mazowieckie Voivodeship scholarship for the best students of technical schools (2021)
• Pika Polska Scholarship (2020)
• Advancement to the second national stage of the OWT ENOT Olympiad (2020)
• "Young Debates" Conference of the Polish Electrical Engineers Association KOS (2020)
• Founding and participation in the scientific club "Communication Without Interference" (2019)

Publications

Solution to the EE11 exam from 2019 YouTube

Solution to the EE11 exam from 2020 YouTube

Ostrowski, K. (2025). Measurement and Control System Design Based on Arduino (Version 1). Zenodo.

Ostrowski, K. (2025). Lexicon: Computer Networks – For Engineers and Technicians (1.0). Zenodo.

Ostrowski, K. (2025). Scientific Notebooks from Tutoring: Radio Technology – Course Notes. Zenodo.

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Skills

Category and Rating	Keywords
Programming ★★☆☆☆	PYTHON, C/C++, basic PHP, basic C# winforms, Batch Scripting basics, Intermediate Bash Scripting
Operating Systems ★★★★☆	Advanced Windows Client Administration, Intermediate knowledge about linux (Daily driving linux), Advanced Windows Server Knowledge
Computer Networks ★★★★★	Cisco IOS, Mikrotik, Sophos Engineer (Next Gen Firewall), OpenVpn, MTCNA, CCNA, Ubiquity, Zabbix, Cacti, SNMP monitoring etc
Electronics ★★☆☆☆	Hobby electronics. Arduino (measurement and control systems with ethernet), multimeter measurements, oscilloscope measurements, simple electronics repairs etc
Office ★★★★☆	Excel (expressions and macros), Word (ActiveX forms), PowerPoint (basics), Access (forms with some VBA), MS365
Virtualization and Containerization ★★★☆☆	Docker management Portainer, Nginx Reverse proxy, LXC containers, Proxmox, Hyper-V, VM-ware ESXi
Cloud ★★☆☆☆	Office 365 Exchange administration, Azure Active Directory, Microsoft Forms, Power Automate, integration with other apps

Languages

Language and Rating	Keywords
English ★★★★★	Cambridge B1 level, scientific and technical vocabulary.
German ★☆☆☆☆	Conversational level, simple vocabulary.
Polish	Native Language