Zmenix Forge - Digital studio site (SR/EN)

Zmenix Forge is a digital studio from Niš that forges custom websites, apps, automations and AI-powered tools.

Highlights:

  • Strong Phoenix/forge brand identity with animated hero + modern landing flow
  • Bilingual (SR/EN) structure and reusable content sections (services/process/contact)
  • Service listing UX (clear categories, modular “offer pieces” that scale per client)
  • Conversion-focused contact page (lead form + clear CTA path)

Technologies: HTML, CSS, JavaScript (vanilla), responsive UI, SEO (meta/sitemap), contact form backend (PHP/mail) + hosting deployment.

View Live  |  Contact Page

Voyager Limo - Luxury transport website

Client-facing website for a licensed limo service from Niš, offering luxury transport for weddings, prom nights, business events, and airport transfers.

Highlights:

  • Luxury-focused layout (services-first navigation + fast “book/contact” path)
  • Clear service segmentation (events / business / transfers) for better conversion
  • Mobile-first responsive design for on-the-go customers
  • SEO + trust pages (e.g., privacy policy) and production deployment under subdomain

Technologies: HTML, CSS, JavaScript (vanilla), responsive layout, SEO, hosting deployment (custom domain/subdomain).

View Live  |  Contact

Zmaj University - Faculty web application

A full-stack faculty information system for managing users, courses, exam periods and student records.
Highlights:

  • Three-role architecture (admin / professor / student) with separated responsibilities and dashboards
  • Course management, enrollments, exam periods, student exam applications and grading
  • PHP + PDO + MySQL backend, secure session handling, prepared statements (no SQL concatenation)
  • Clean responsive UI with Bootstrap + custom theme, role-specific navigation and stats
Technologies: PHP, PDO/MySQL, Bootstrap, HTML/CSS, JS (vanilla), model-viewer (GLB), assets (Figma + ODT/PDF docs).

Documentation hub  |  Open live demo

Typing Speed Test App (Android, Java)

A mobile typing speed test app for Android, inspired by MonkeyType, built with Java and Android Studio.
Features:

  • Timed typing tests with randomly generated word sequences
  • Live stats: WPM (Words Per Minute), accuracy, and errors
  • End-of-test summary and performance results
  • Test history saved locally for review
Technologies: Java (Android Studio), Android UI components, local storage, custom random word generator.

View on GitHub

ZmajParle (Android, Java)

An Android app for language learners to build, tag, and favorite custom vocabulary lists-then assemble sentences and get instant feedback and audio pronunciation.
Features:

  • Add and categorize new words/phrases by part of speech and custom tags
  • Favorite important vocab for fast access
  • Search and filter vocabulary instantly
  • Assemble sentences from your own saved words and get instant translation/structure feedback
  • Audio playback for your sentences (Text-to-Speech)
Technologies: Java (Android Studio), SQLite/SharedPreferences, Android TTS, custom UI.

View on GitHub

AirGuard - Air Quality Dashboard

Client-side web app for tracking and visualizing air quality across Serbian cities: live EU AQI & pollutants, interactive map, hourly forecast, and health guidance.
Features:

  • Interactive Leaflet map with color-coded markers (good / moderate / poor)
  • Charts for PM2.5, PM10, NO₂, SO₂, CO, O₃ (last 24 h)
  • 24 h forecast via Open-Meteo Air Quality API
  • Advisories and optional email notifications
Technologies: HTML, CSS (Bootstrap), JavaScript, Chart.js, Leaflet, Open-Meteo API.

View Live

Shop - Laravel CRUD + PHP

A lightweight Laravel shop: public catalog + admin CRUD. Ships with a plain PHP health.php endpoint for shared hosting checks.
Features:

  • Products list, detail, and keyword search
  • Admin CRUD with validation (create/edit/delete)
  • Migrations & seeders; SQLite (dev) and MySQL-ready (prod)
  • Blade views with pagination; formatted price accessor
  • PHP /health.php returning JSON status
Technologies: PHP, Laravel, Blade, SQLite/MySQL.

View on GitHub

Water Vortex Simulation (Blender)

A Blender scene focused on realistic glass, water, and HDRI lighting, featuring a stylized water vortex inside a glass.
Features:

  • Physically-plausible glass & water shaders with clean reflections
  • HDRI-based lighting (Poly Haven) with Filmic color management
  • Camera/turntable animation ready; DOF and subtle glare in compositor
  • Optimized Cycles denoising/samples for faster renders
Technologies: Blender (Cycles), Filmic, Compositor (glare/color balance), HDRI workflow.

View on GitHub

Spam Detection (TF-IDF + Classic ML)

End-to-end email spam classifier built on TF-IDF over SpamAssassin + Enron, comparing MultinomialNB, LinearSVC, and XGBoost with ROC/PR analysis and threshold tuning.
Features:

  • Clean data pipeline (MIME parsing, dedup, normalization) and stratified splits
  • TF-IDF (1–2 n-grams) + classic ML baselines (MNB/LinearSVC) and XGBoost
  • Precision-Recall focus for imbalanced data + ROC, confusion matrices
  • Threshold sweep for XGBoost with reproducible artifacts (JSON/CSV/PNG)
Technologies: Python, scikit-learn, XGBoost, NumPy, Pandas, Matplotlib.

View on GitHub

Data Logger (Arduino UNO)

Autonomous recorder that samples temperature, humidity, and motion and writes neatly formatted rows to an SD card.
Features:

  • DHT22 (temp/humidity), PIR motion, SD card logging over SPI
  • Non-blocking loop (millis) with 60 s default interval; adjustable at runtime
  • Serial commands: READ (dump & truncate log) and SET_INTERVAL=<s>
  • Clean tabular output: °C | %RH | motion state
Technologies: C++ (Arduino), PlatformIO, Wokwi, SD/SPI, DHT library.

Open in Wokwi

Streaker - Daily Streak Tracker (React + Node.js)

A small full-stack app that tracks your daily habit streak. Frontend in React (Vite), backend in Express with a lightweight SQLite database.
Features:

  • Mark/undo today and see the current streak instantly
  • Last update timestamp
  • Simple REST API with CORS and JSON responses
  • Local, zero-config SQLite storage (via better-sqlite3)
Technologies: React (Vite), JavaScript (ESM), Express, SQLite (better-sqlite3), REST API, CORS.

View on GitHub

SixBits - Daily 6-bit Guess (React)

A tiny Wordle-style binary game: guess a 6-bit code in 8 tries; feedback shows only how many bits are correct. New puzzle every 24h.
Features:

  • React + Tailwind neon/glass UI; keyboard and on-screen input
  • Daily seed, auto-save and basic stats (localStorage)
  • Share result to clipboard; countdown to next code
Technologies: React (Vite), Tailwind CSS.

View Live  |  View on GitHub

Employee CRUD GUI Application

A Python desktop application with a graphical user interface (GUI) for managing employee data. It allows users to perform Create, Read, Update, and Delete (CRUD) operations connected to a MySQL database.

View on GitHub

Library Management System

A command-line program for managing a library, enabling users to add, lend, and return books. Developed using Object-Oriented Programming principles in Python.

View on GitHub

Supermarket Cashier System

A Python-based cashier system for managing product purchases, calculating total bills, and applying discounts based on membership levels.

View on GitHub

Previous Portfolio

The portfolio i used before i started working on this one.

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AI Art - Logos

Collection of AI-generated logos, showcasing modern, minimalist and creative designs.

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AI Art - Avatars

Collection of AI-generated avatars, showcasing modern and creative designs.

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AI Art - Portraits

Explore AI-generated portraits of various characters with realistic and stylized effects.

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AI Art - Anime Characters

A gallery of AI-created Anime Characters.

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AI Art - Objects and Cars

A gallery of AI-created objects, vehicles, and unique designs inspired by technology.

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Figma Projects Showcase

A collection of professional and creative design projects crafted in Figma, showcasing diverse UI/UX skills.

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WordPress Portfolio Website

A portfolio site built with WordPress.

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WordPress E-Commerce Store

An e-commerce website designed on WordPress to display and sell products with a user-friendly shopping experience.

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WordPress Business Website

A professional business website crafted in WordPress, showcasing services, contact details, and a modern layout.

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Webflow Business Website

A professional business website crafted in Webflow, showcasing services, contact details, and a modern layout.

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Map
FAQ
Profile Picture

Hi, I'm Jovan

An engineer from Niš, Serbia, known for my analytical mindset, logical approach, and rapid problem-solving skills.

I specialize inPython, and much more.

Fluent in Serbian and English, with intermediate Russian, and learning French, German and Mandarin.

Skills & Technologies

In my journey so far, I've honed a broad skill set that lets me tackle projects with both technical precision andcreative flair.Whether diving into data or crafting compelling content, my experience across diverse fields helps me deliver standout results from every angle.

Primary Skills
Programming Languages
Web Development
Frontend Development
Backend Development
No-Code Site Development
Sub-Skills
Database Management
UI/UX Design
Productivity Tools
AI and Creative Tools
Languages

Professional Memberships:

Python Software Foundation Logo

Python Software Foundation (PSF): This organization supports and promotes the Python programming language and its community through funding, development, and advocacy.

Open Source Initiative Logo

Open Source Initiative (OSI): This organization promotes and protects open-source software by advocating for the adoption of open-source licenses and practices.

Book of Certificates

Certificate 1
Certificate 2
Certificate 3
Certificate 4
Certificate 5

Curriculum Vitae

CV preview not available on mobile. Please use a PC to view or download the CV.

My Location

Hello from Niš where creativity flows as freely as the Nišava River!

In this city of rich history and lively spirit, tradition and innovation come together!

Envisioning the Future of My Work

My ambition is to evolve into a 10x engineer, seamlessly blending creativity with technical prowess to develop solutions that make a profound difference.

I am committed to challenging the limits of innovation, crafting projects that are not only practical but also pioneering in the dynamic tech landscape.

Through a dedication to continuous learning and adapting to emerging technologies, I aim to elevate my contributions to drive substantial change and set new benchmarks within the industry.

My Services

Web Development

Building responsive and dynamic websites using HTML, CSS, JavaScript, and modern frameworks like WordPress and Webflow.

Backend Development

Creating powerful backend systems with Python, C++, and MySQL to support complex applications and websites.

Applications & Scripts

Developing versatile applications and scripts in Python and C++ for automation, data processing, and more.

AI Art & Creative Coding

Combining art and technology to generate stunning AI-driven artworks and interactive applications.

GUI Development

Designing and developing intuitive desktop applications with Tkinter for a seamless user experience.

Ready to Take the Next Step?

I’m here to help you succeed. Click the button below to get started!

Get Started

Hobbies

My go-to hobbies include gaming, coding, playing the electric guitar, and chess. I enjoy watching YouTube and listening to music almost nonstop.

During the winter, I embrace skiing, while summer finds me traveling and occasionally camping or fishing. These are just a few of the many hobbies I indulge in.

I’m dedicated to learning new things and have an extensive list of skills and topics I want to explore, including Russian, French, and Mandarin Chinese.

I also enjoy watching movies and series, but I prefer those with ratings of 8/10 or higher, as anything less feels like a waste of time. My downtime is limited as I’m always seeking either enjoyment or personal growth.

Explore myMusic playlistto see what I’m into.

Resource Library

Open Source Apps

JavaScript Libraries

Free and Open-Source JavaScript Animation Libraries.

Visit

Three.js

Three.js is an open-source JavaScript library that streamlines the creation of 3D graphics and animations for the web, leveraging the power of WebGL.

Visit

Websites

Code Pen

CodePen is an online code editor and social development environment where users can write and showcase HTML, CSS, and JavaScript code snippets in real-time.

Explore

Unsplash

The internet’s source for visuals. Powered by creators everywhere.

Explore

Godly

Astronomically good web design inspiration. Only the best of the best.

Explore

Discoveries

Ranking Programming Languages by Energy Efficiency

An analysis of programming languages based on their energy consumption efficiency, highlighting how different languages impact computational energy use and sustainability.

Learn More

Converters

Removebg

Usefull for removing background of images.

Go To

Zamzar

online file conversion service that allows users to convert various file formats, including documents, images, and videos, without the need for software installation.

Go To

About This Portfolio

Welcome to the culmination of countless late nights, early mornings, and a passion for perfection. This portfolio is a living, breathing project-still evolving, still growing, and far from finished.

What You’ll Find Here

This space is a reflection of my journey as a creative and technical professional. Here, you’ll find a mix of completed projects and experiments, each crafted with a blend of dedication and curiosity.

Why It Matters

This portfolio is not just a showcase; it’s a testament to the process of learning, iterating, and pushing the boundaries of what’s possible.

Thank you for taking the time to explore my work! Your interest is not just appreciated; it’s a part of this journey.

Contact

I’d love to hear from you! Whether you have a question, a project in mind, or just want to connect, feel free to reach out using the options below.

Email:Email Icon jjovan4077@yahoo.com

© 2025 Jovan Jovanović. All Rights Reserved. Unauthorized use of content is prohibited.Terms of Use.

Welcome to My World

Explore an immersive biography and the story of how things unfolded. I promise an adventure!

Discover My Story