Open to opportunities

Denis Šifra

Bachelor Student of Cybersecurity · TUKE

Cybersecurity student with a passion for software development, problem solving, and hands-on technical projects. Building secure systems one line at a time.

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Denis Šifra

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About me

Passion-driven
technologist

I'm a Cybersecurity student at the Technical University of Košice with a strong passion for IT technologies, programming and problem solving. Actively developing skills in software development and information security while gaining hands-on experience through personal technical projects.

In my free time, I focus on electronics, electrical engineering, 3D modeling and 3D printing, continuously expanding my practical and analytical abilities. I'm motivated, detail-oriented and eager to grow as an IT professional.

Since 2023 I've also been teaching Python programming to young students at Algorithmics Slovakia — explaining complex concepts clearly and guiding them through hands-on projects.

2+
Years teaching Python to young students
6+
Programming languages & tools
C1
English — State Language Exam
3
Certifications incl. CCNA Security

Work Experience

Where I've worked

2023 - Present

Algorithmics Slovakia

Teacher · Part-time

  • Deliver programming courses covering Python fundamentals, algorithms and computational thinking for young students.
  • Explain complex technical concepts in a clear, accessible way tailored to beginners.
  • Guide students through hands-on coding projects, strengthening their logical reasoning and debugging skills.

May 2025 - Sep 2025

DPD

Delivery Driver · Part-time

  • Maintained accurate records of deliveries and payments using company systems.
  • Developed strong communication skills through daily interaction with customers.
  • Worked independently in a fast-paced environment requiring reliability and accountability.

Jun 2022 - Aug 2024

Wolt Slovakia

Delivery Driver · Part-time

  • Managed time-sensitive deliveries in a fast-paced urban environment.
  • Used mobile applications for order management, navigation and communication.
  • Worked independently with strong time management and organisational skills.

Education

Academic background

2023 - Present

Technical University of Košice

B.Sc. Cybersecurity · Faculty of Electrical Engineering and Informatics

  • Bachelor's thesis: RFID-Supported Interactive Quiz System — designed and implemented a secure quiz platform with RFID authentication using ISIC cards.
  • Analyzed OpenLab infrastructure and identified required API interfaces for integration with interactive system components.
  • Designed a secure and scalable architecture combining RFID reader hardware, backend logic and quiz management.
  • Developed technical documentation in accordance with faculty standards.

2019 - 2023

Secondary School of Electrical Engineering

Computer Networks and Information Technologies

  • Studied computer networking fundamentals including TCP/IP, routing and LAN configuration.
  • Learned programming fundamentals: algorithms, data structures, object-oriented programming.
  • Worked with databases and SQL; developed foundational knowledge in Windows and Linux.

Skills

Technical toolkit

Programming

Python80%
Java50%
C65%
Assembly (x86 / 8080)60%
SQL90%
HTML / CSS90%

Cybersecurity

Network fundamentals Basic cryptography Secure coding Common vulnerabilities Linux CCNA 1 CCNA Security RFID

Tools & Technologies

Git MySQL / PostgreSQL JDBC Maven JUnit 5 NASM UML SCRUM MS Office

Hardware & Making

Electronics fundamentals Microcontrollers Soldering 3D modeling — Autodesk Fusion 3D printing — FDM Device repair

Soft Skills

Analytical thinking Problem solving Self-learning Attention to detail Time management Team collaboration Teaching & mentoring

Certificates

Verified credentials

CCNA 1

Cisco networking fundamentals certificate.

Open certificate ⇗

CCNA Security

Cisco security-focused networking certificate.

Open certificate ⇗

English C1 State Language Exam

State language exam confirming C1 English level.

Open certificate ⇗

Portfolio

Selected projects

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RFID Interactive Quiz System

Bachelor's thesis — a secure, scalable quiz platform with RFID student authentication via ISIC cards, integrated with OpenLab infrastructure.

RFID Backend Security REST API
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Slitherlink Puzzle Game

Java/Maven console application implementing the Slitherlink logic puzzle with PostgreSQL database integration, JUnit 5 test suite and full documentation.

Java Maven PostgreSQL JUnit 5
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x86 NASM Assembly Parser

Low-level x86 assembly program for parsing space-separated integers, comparing against a dynamic threshold, and outputting results in octal — complete stack management.

x86 ASM NASM Linux
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8080 FSM Email Validator

Intel 8080 assembly finite-state machine validating email address syntax — designed correct FSM states, fixed domain parsing bugs, handled edge cases.

Intel 8080 FSM Assembly
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Guesthouse Website

A clean, responsive website designed and built for a local guesthouse — showcasing rooms, amenities and contact information.

HTML CSS JS

Contact

Let's connect

Open to new opportunities

Whether you have a project in mind, a question about my work, or just want to connect — feel free to reach out. I'll respond as soon as I can.

📞

Phone

+421 902 591 408
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Email

denis.sifra@gmail.com
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LinkedIn

Denis Šifra
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Location

Vernár / Košice, Slovakia