Something little about me

Nice to meet you!

My name is John. I am 23 years old software engineer specialized in Java Development with 4 years of experience in software engineering. I have completed Bachelor's Degree at the University of Žilina, Faculty of Management and Informatics.

I have started my journey as a software engineer by creating plugins (addons) for server-side based forks for game Minecraft. During these years I have completed lot of private commissions for various startup community servers and private projects for worldwide customer. I have also published few of mine resources which I am still maintaining!

After time has passed I have moved into more enterprise based development and I am always looking forward to expand my skills. I always wanted to make something unique, that would prove useful for us all.

Personal Information

  • Name: Bc. Ján Kluka
  • Birthday: 24th March, 1999
  • E-mail:
  • Discord: Drawethree#1018

Hard Skills


SQL Databases (MySQL, OracleSQL, SQLite)


Spring Framework

No-SQL Databases

Soft Skills

Team Player


Problem-solving and critical thinking

Communication skills


My Public Software


Minecraft Plugin

Ultra Prison Core is an ultimate solution for your prison server. This core contains everything that should be on each prison server. By including 20+ Custom Enchants, Auto-Sell, Auto-Miner, Tokens & Gems currencies, Ranks & Prestiges, Multipliers, Gangs and a lot of more, its one of the best prison cores on the market.

Check it out!

Ultra Backpacks

Minecraft Plugin

Ultra Backpack is a backpack system suitable mostly for prison servers. This system is very similar to MCPrison backpack system, containing Auto Sell, Sell Multiplier and Capacity enchantments. UltraBackpacks has a very friendly user interface via GUIs, that are ready to be modified just like you ever wanted. And of course, it works with UltraPrisonCore !

Check it out!

Ultra Prison Mines

Minecraft Plugin

UltraPrisonMines is a mines system that offers everything that each prison mines system should have. And of course, its well optimized and suitable for any sized minecraft server!

Check it out!

PRO DeathChest

Minecraft Plugin

PRO DeathChest is a plugin which manages players items after their death. This plugin simply spawns a chest with player's items so players can easily pickup their items and don't have to worry that someone will steal them, or they will be lost. PRO DeathChest is suitable for any kind of server!

Check it out!



With experience in writing highly-optimised code, you're in good hands. Whether you need a whole new Core developed, a plugin updated to the newest version, or simply an in-house Developer, I'm sure I can help you out.


Discord offers a functionality to create custom BOTs and add them to your Discord servers. Ever wanted a custom featured BOT for your Discord server? I can do that for you.


Desktop applications, Web applications, Microservices.

I'm available for Freelance


GlobalLogic Slovakia s.r.o

06/2021 - present
Customer Process Development for large telecom provider.


Development of custom trolling system for YouTube video.

03/2021 - 04/2021
Development of custom features and maintaining core.


05/2020 - 03/2021
Development of HCF Core and various Java applications.


05/2020 - 03/2021
Development of Prison Core and various Java applications.


06/2020 - 09/2020
Development of Prison Core.


Updating and developing various Prison related projects.

Contact Me