Kacper Jarosławski

Backend developer building practical solutions to problems

18-year-old backend-focused developer from Poland, building practical tools for real-world problems. I work primarily with Python, with ongoing exploration into Go and C++. My projects range from system utilities to web applications — all born from personal needs and the joy of problem-solving through code.

Python Pytest Flask Flask-SQLAlchemy Flask-Migrate Werkzeug CustomTkinter Click PyQt Pydantic SQLAlchemy SQLite Flask-WTF Jinja2 PostgreSQL TailwindCSS Docker Rich

My Projects

Not all projects are listed here.

HLPatcher

Released

A tool for making Half-Life and other Valve games playable on modern ARM Macs by patching game binaries to support 64-bit architecture.

Python CustomTkinter Pytest

Modded Instance Version Control

Upcoming

Version Control System for modded game instances. Work in progress.

Python Click PyQt Pydantic Pytest Flask Flask-SQLAlchemy Flask-Migrate SQLAlchemy Werkzeug SQLite
Check out

Portfolio Website

You are Here!

A self-built portfolio website with a custom CMS for managing all displayed content and project information.

Python Flask Flask-WTF Flask-SQLAlchemy Flask-Migrate Jinja2 Werkzeug PostgreSQL TailwindCSS Docker
You are Here!

mcup

Released

A command-line tool for quickly creating Minecraft servers with template support and version management across multiple server types.

Python Pytest Rich

Contact Me

Get In Touch

Have a project in mind or just want to say hi? Feel free to send me an email.

[email protected]