Backend development for your team
Java, databases, cross-server communication, and production maintenance. I am looking for a junior role or internship where I can contribute to real systems and work with experienced engineers.
View résuméJava Backend Developer
I build and maintain Java backend systems and websites for businesses. My work includes Boxhunt.pl, a multiplayer platform that has handled 1,300+ concurrent players, and two live client websites.
Available for junior backend roles, internships, and freelance projects.
Work with me
A website or application for your business
I build business websites, product catalogs, and API integrations. I can create a new site, improve an existing one, and handle deployment.
Tell me about your projectSelected work
Systems I have shipped and maintained
Live client websites, a Java platform used by thousands of players, and open-source software. See the results, visit the sites, or read the code.
Independent production platform · August 2022-present
Boxhunt.pl
A Minecraft multiplayer network backed by a custom Java platform and operated independently since 2022.
- 1,300+ concurrent players at peak
- 13k+ Discord community
- Maintained in production since 2022
Freelance client website · 2024
wynajem-samochody.pl
A responsive production website for a truck rental business with a fleet of around 120 vehicles.
- Delivered to a real business
- Deployed and publicly available
Freelance client website · 2025
algupominki.pl
A production marketing website for a promotional-products company in Poznań.
- Delivered to a real business
- Deployed and publicly available
Open-source client mod · 2024-present
TwemojiChat
A client-side mod that adds emoji autocomplete and Twemoji rendering to Minecraft chat.
- Fabric, Forge, and NeoForge support
- 600+ downloads on Modrinth
- MIT licensed and publicly maintained
Experience
Experience from building and shipping
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Freelance Web Developer
Client business projects
2024-present
Delivered production websites for two businesses, covering requirements, responsive implementation, deployment, and clear lead-generation paths.
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Founder / Lead Developer
Boxhunt.pl
2022-present
Design, develop, deploy, and operate the platform, its custom Java systems, and the infrastructure supporting releases and large traffic peaks.
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Open-source Maintainer
TwemojiChat
2024-present
Maintain multi-loader and multi-version compatibility, generated assets, CI, releases, bug fixes, and public documentation.
Skills
Technologies in context
Java backend
Java systems, cross-server communication, and persistent data in Boxhunt.pl.
Boxhunt.pl- Java
- Kotlin
- Redis
- MongoDB
- MySQL
- TypeScript
- React
- Vite
- Node.js
- Express
- HTML
- CSS
Deployment and maintenance
Linux deployments, automated builds, and releases for Java and open-source projects.
TwemojiChat- Linux
- Docker
- Gradle
- Git
- GitHub Actions
About
Backend focus, production experience
About me
I am a developer from Poznań with a focus on Java and backend systems. I take projects from requirements through implementation, deployment, and maintenance. I built and operate Boxhunt.pl, delivered websites for two businesses, and maintain the open-source mod TwemojiChat. I am open to joining an engineering team or taking on a freelance project.
Contact
Have a role or project in mind?
For hiring, send the role and what your team builds. For freelance work, tell me what you need, your timeline, and your budget. Email me directly or use the form.