Danylo V.

Open to junior developer roles in Warsaw

Danylo Vilkhovyi

Junior software developer and third-year cybersecurity student in Warsaw. I build desktop apps in Python, configure networks in Cisco labs and produce AI ad campaigns for D2C brands.

See my work
Now
AI Creative Producer, Ghost Growth LLC
2026
Junior Software Developer intern, BASTARTS
Study
B.Sc. Cybersecurity, UTH Warsaw, GPA 4.5 / 5.0
Based in
Warsaw, Poland

RJ45, wired to T568B

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About

I'm a third-year Cybersecurity student at UTH Warsaw who already ships software. I built a Python and PySide6 desktop app with a SQLite data layer in an intern team, using Git and GitHub.

Alongside that I run hands-on network labs and produce generative AI ad campaigns for international clients.

  • UAUkrainian, native
  • PLPolish, C1
  • RURussian, C1
  • ENEnglish, B2
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Work

Junior Software Developer

Intern at BASTARTS Tomasz Woźniakowski, Warsaw

06/2026 to 10/2026
  • Developed Projekt Audio Opus, a Python and PySide6 desktop application, in an intern team using Git and GitHub workflows.
  • Migrated the data layer from JSON files to a SQLite database.
  • Implemented CRUD for streaming platforms and PDF and TXT report generation.
  • Wrote unit tests alongside my features: settlement amounts, XLSX report import, product matching and the PDF and HTML report generator.
  • Improved the GUI, delivered the project at handover in 09/2026 and kept fixing issues after it.
  • Python
  • PySide6
  • SQLite
  • Git
  • GitHub
Projekt Audio OpusPython desktop app for platform sales reports and settlements
  • 378team commits
  • 07–09/2026three months
  • 57mine and paired

Pair programming: I built the GUI together with a teammate for the whole project, so 36 of her GUI commits are shared work, on top of 21 under my name.

teammates me dashboard Gmail themes assistant settlements PDF reports XLSX import GUI, quarterly handover main
  • Streaming, products and clients tabs with CRUD tablesteamme
  • GUI across the app, pair-programmed with a teammate from July to Septembermeteam
  • Settlement dialog with PDF preview, commission and quarterly periodsme
  • Report generator and XLSX platform report importmeteam
  • Report calculator with teststeamme
  • Gmail sending, themes, start dashboard, AI assistant, backupsteam
  • Windows installer and handover in 09/2026team

AI Creative Producer

Ghost Growth LLC, remote, through my registered business in Poland

02/2026 to present
  • Produce AI-generated static ad campaigns for D2C telehealth and wellness brands from client creative briefs.
  • Deliver prompt libraries and interactive HTML console apps with 20 to 40 ads per brief.
  • Developed prompt conventions (scale anchors, anti-CGI realism, brand-asset rules) that keep product proportions and photorealism consistent.
  • Handle international client invoicing in USD.
  • GPT Image 2
  • Nano Banana 2
  • Higgsfield
  • Kling
  • CapCut

Illustration of a campaign workflow9:16, 1080 × 1920 px, HTML console delivery

  • 20+D2C brands
  • 20–40ads per brief
  • 9:16vertical format
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Projects

Team project, internship, 07–09/2026

Projekt Audio Opus

Python and PySide6 desktop app for platform sales reports and settlements, built by an intern team and handed over in 09/2026.

  • 378team commits
  • 57mine and paired
  • 16test files in my commits
  • Settlement dialog with PDF preview, commission and quarterly periods.
  • XLSX platform report import and the PDF and HTML report generator.
  • Unit tests for settlement amounts, report import and product matching.
  • GUI pair-programmed with a teammate for the whole project.
  • Python
  • PySide6
  • SQLite
  • XLSX
  • Git
Full story in Work

University lab, Fundamentals of AI, 10/2026

Feature selection and kNN classification

Four ways to cut an 11-feature dataset (200 samples, two classes) down to its most useful features, each tested with kNN for k from 1 to 30: 150 runs on the same stratified 160/40 split, with scaling and selection fitted on the training data only.

Best test accuracy by feature set, out of 40 test samples
  • All 11 features k = 372.5%
  • 4 features, VarianceThreshold k = 7, 967.5%
  • 3 features, visual, SelectKBest and Extra Trees k = 1365.0%

Fewer features gave a simpler model but did not beat the full set. The report also explains why the best of 150 runs on one test split is not an independent score.

  • Python
  • scikit-learn
  • NumPy
  • Matplotlib
Code and report on GitHub
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Network labs

In Cisco Packet Tracer I design multi-LAN topologies with IP addressing and subnetting, static routing and RIPv2.

I set STP root and secondary root bridges, PortFast, EtherChannel with LACP and port security, then write standard and extended ACLs that restrict HTTP, FTP and email traffic between hosts.

Every configuration gets verified with ping, show commands and Simulation Mode. I also work with Proxmox virtualization and a pfSense firewall.

  • Packet Tracer
  • ACL
  • STP
  • EtherChannel
  • RIPv2
  • Proxmox
  • pfSense
PC SW3 SW1 root bridge SW2 secondary root EtherChannel LACP STP blocked R1 ACL Server
  • HTTP permitted
  • FTP and email denied
  • Port blocked by STP
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Skills

  • Programming languages

    • Python
    • Java
    • JavaScript
    • TypeScript
    • SQL
    • Bash
    • HTML and CSS
    • C (beginner)

  • Frameworks and libraries

    • PySide6 (Qt for Python)
    • Spring Boot
    • React
    • scikit-learn
    • NumPy
    • Matplotlib

  • Databases

    • SQLite
    • MariaDB
    • MySQL
    • PostgreSQL
    • JSON to SQLite migration

  • Development tools

    • Git
    • GitHub
    • Docker
    • Postman
    • pytest
    • Claude Code

  • Software engineering

    • OOP
    • REST APIs
    • CRUD applications
    • Desktop GUI development
    • PDF and TXT reports
    • Unit testing

  • Networking

    • Cisco Packet Tracer
    • TCP/IP and OSI model
    • IP addressing and subnetting
    • VLAN
    • Static routing, RIPv2
    • OSPF
    • NAT
    • DHCP
    • DNS
    • ACL
    • STP
    • EtherChannel (LACP)
    • Port security
    • SSH
    • VPN
    • pfSense

  • Security

    • Wireshark
    • Nmap
    • Kali Linux
    • Burp Suite
    • Metasploit
    • OWASP Top 10
    • Splunk
    • Wazuh (SIEM)
    • IDS/IPS
    • Hashing and encryption
    • Active Directory

  • Systems and virtualization

    • Linux
    • Windows Server
    • Proxmox
    • VirtualBox
    • VMware

  • Generative AI

    • Prompt engineering
    • OpenAI and Claude APIs in Python
    • GPT Image 2
    • Nano Banana 2
    • Higgsfield
    • Kling
    • Ideogram
    • Recraft
    • CapCut
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Education

B.Sc. in Cybersecurity

UTH Warsaw (Uczelnia Techniczno-Handlowa), year 3

10/2024 to present, graduation expected 2028

4.5GPA out of 5.0

Computer networks, Linux systems, Python, Java, databases, web development and information security.

  • CCNA: Introduction to NetworksCisco Networking Academy, ITN
    Completed
  • CCNA: Switching, Routing, and Wireless EssentialsCisco Networking Academy, SRWE
    Completed
  • CCNA: Enterprise Networking, Security, and AutomationCisco Networking Academy, ENSA
    In progress
  • CompTIA Security+Certification
    In progress
  • Designed a MariaDB online-shop database with an entity-relationship diagram and full documentation.
  • Built a web application in Spring Boot.
  • Also programmed in C at beginner level.
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Contact

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Open to junior developer roles, internships and AI creative work.

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