Ready to work

I create modern and high-performance applications that combine speed with intuitive design.

Hi, I'm Mariusz FullStack Developer.

My Github
kontakt@avadi.ovh
FEATURED CASE STUDIES
Created work
Automation projects
project image

Automation projects

Part of automation projects I have created
Baselinker - Integration AI auction software
Allegro Product Manager - Software for product sourcing
Allegro Order Fulfillment - Streamlining the order process
MediaExpert Price Analyzer - Market research for MediaExpert
Google Reviews Management - Customer feedback collection
Facebook Engagement Tool - Social media management
Oglaszamy24 Listing Manager - Platform for oglaszamy24
Invoice Automation - Digital paperwork management
Netflix Setup Assistant - Get Codes and delivering them to the user email
Stack ImagePlaywright
Stack ImagePuppeteer
Stack ImageTypeScript
Stack ImageNodeJS
Stack ImageBun
Modern full-stack internet forum
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Online forum

Modern full-stack internet forum with user registration, topic creation, posts, ratings, and admin controls. Built with a focus on performance and usability.
User registration and authentication system.
Topic creation with posts and ratings.
Admin controls and moderation tools.
Stack ImageTypeScript
Stack ImageReact
Stack ImageNextJS
Stack ImageTailwindCSS
Stack ImageMotion.
Stack ImageExpressJS
Stack ImageNodeJS
Stack ImagePrisma
Stack ImageZOD
Online gambling site simulator
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Casino simulator

Website that allows users to play in three different modes: roulette, crash, and coin toss. Users can chat with others and collect bonuses. The site also features a wallet system, where each wallet has a different balance.
Three game modes: roulette, crash, and coin toss.
Real-time chat with other players.
Wallet system with bonus collection.
Stack ImageTypeScript
Stack ImageVueJs
Stack ImageCSS
Stack ImageNodeJS
Stack ImagePrisma
Stack ImageZOD
Advanced gambling platform
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Gambling simulator

Website that offers three different games. It includes a main wallet, bonus codes, a chat feature, and automatic chat competitions. Active users had access to free reward boxes. The service also has a full management panel.
Multiple game options with main wallet.
Bonus codes and chat competitions.
Full management panel for administrators.
Stack ImageJQuery
Stack ImageNode.js
Stack ImageExpress.js
Stack ImageMongoDB
Online library platform
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Library site

Online library for users who love reading. It allows users to borrow books online, tracks their progress and achievements, and each user has a separate reader profile containing their statistics. After reading a book, they can rate it.
Online book borrowing system.
Progress tracking and achievements.
Book rating and reader statistics.
Stack ImageVueJS
Stack ImageCSS
Stack ImageNodeJS
Stack ImageExpressJS
Stack ImageMongoDB
Margonem game extension
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Game addon

Global add-on for the game 'Margonem' that allowed users to save battles from the entire private server. The add-on was used by around 80 players, and all battles were saved live and displayed to other players.
Live battle saving and tracking.
Real-time display for other players.
Server-wide statistics collection.
Stack ImageJQuery
Stack ImageCSS
Stack ImageNodeJS
Stack ImageExpressJS
Stack ImageMongoDB
Personal portfolio website
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Portfolio

Old portfolio where every element on the site was built using pure JavaScript. All animations and sliders were crafted with pure CSS. The website features a cosmic theme with elements of modernity. It includes a system for observation.
Custom-built animations and sliders.
Pure JavaScript implementation.
Cosmic-themed modern design.
Stack ImageVanilla JS
Stack ImageVanilla CSS
SKILL DEVELOPED
Experience
FullStack DeveloperAs a management board member, I created dedicated software supporting the e-commerce model, Oriented to the company's individual needs. I was responsible for the entire technical support from integration with e-commerce platforms, through process automation, to ongoing system maintenance and development.
AGS z.o.o2024 - 2025
FullStack DeveloperI create software "after hours" for private clients on a freelance basis. The scope of my projects is diverse. I have created designs for websites, applications, and scripts. A significant part of my projects is focus on automating everyday tasks, such as managing, promoting, and supporting online stores.
Freelance2022 - 2025
FullStack InternshipInternship at Inn-Tek. During this period, I worked as a full-stack developer, focusing on creating APIs and modifying existing solutions in PHP and JavaScript. Primarily, I created new functionalities for a public online library.
Inn-Tek2023 - 2024
Engineering studiesEngineering studies, graduating with an Engineer's title. My engineering thesis focused on website development: Design and implementation of an online library collection management system online.
University of Lomża2021 - 2024
Get to know me
About Me

Full-Stack Developer

Hi! I'm a 26-year-old programmer from a small town with a big passion for technology. I started coding about 5 years ago as a hobby.
Throughout this time, I’ve completed hundreds of projects — most of them focused on automating and optimizing everyday work processes, helping people save time and improve efficiency.
I love exploring new technologies, experimenting with different programming tools, and constantly refining my code to make it cleaner, faster, and more maintainable.
Outside of work, I enjoy learning new programming languages like Go, and exploring trends and emerging technologies that help me stay ahead in programming.

FrontEnd

Stack ImageTypeScript
Stack ImageReact
Stack ImageNextJS
Stack ImageVueJs
Stack ImageTailwindCSS
Stack ImageMotion.
Stack ImageI18N

Backend

Stack ImageTypeScript
Stack ImageBun
Stack ImageNodeJS
Stack ImageExpressJS
Stack ImagePrisma
Stack ImagePlaywright
Stack ImageZOD
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