Karl Alexandersson
Curriculum Vitae
Contact:
Malmö, Sweden
siiigsonik@gmail.com
github.com/Zeadar
LinkedIn
Current Focus:
  • Backend development
  • Linux systems tooling
  • C and Rust
  • Command-line utilities
  • Networking and automation
Core Skills:
  • JavaScript
  • Node.js
  • HTML and CSS
  • Three.js
  • C
  • Rust
  • Linux
  • Git
  • Debugging
  • AI-assisted development
Languages:
Swedish - Native
English - Fluent
References:
Available upon request
Profile

Software developer with professional experience building JavaScript-based interactive applications, frontend interfaces, internal tools, Node.js services, and 3D features with Three.js.

Current focus: backend and systems development, especially C, Rust, Linux tooling, networking, automation, and command-line utilities.

Looking for backend, systems, Linux tooling, internal tools, or C/Rust-adjacent developer roles.

Work Experience
2020 - 2024
Software Developer
Cyberworld Adventure AB, Malmö
  • Built JavaScript-based interactive applications and game-like experiences using Adobe Animate.
  • Developed Node.js server functionality for application and internal tooling needs.
  • Created browser-based internal tools using JavaScript, HTML, and CSS.
  • Implemented 3D functionality using Three.js.
  • Worked across frontend, application logic, debugging, and production-oriented feature development.
2019 - 2020
Software Developer Intern
Cyberworld Adventure AB, Malmö
  • Supported development of JavaScript-based interactive applications.
  • Gained practical experience in a professional software development environment.
Featured Projects
synthetic-mouse

Linux C application that maps events from evdev input devices to a virtual mouse using evdev/uinput.

github.com/Zeadar/synthetic-mouse
blocktimer

Linux firewall scheduler written in C for blocking domains, IPs, and CIDR ranges during configured time windows.

github.com/Zeadar/blocktimer
netblocker

Small Linux daemon that blocks outbound IPv4/IPv6 traffic on a schedule and handles wake/sleep events.

github.com/Zeadar/netblocker
Courses
2024 - 2025
Systemutvecklare .NET
Lexicon Malmö
  • .NET, ASP.NET, and C#
  • Database methodology and Entity Framework
  • Frontend development with HTML, CSS, JavaScript, and React
  • AI and Python
2021
JavaScript Algorithms and Data Structures
freeCodeCamp
2016 - 2017
University Courses
Malmö University
  • Game Design, 7.5 credits
  • Object-Oriented Game Programming, 15 credits
  • Mathematics for Game Developers, 7.5 credits
  • Database Technology, 7.5 credits
  • Computer Science: C++ and Program Construction, 7.5 credits
Education
2016
Network Technician
Municipal Adult Education, Movant, Lund
  • Computer and network technology
  • Network security
  • Network technologies and administration
  • Electronics, microcomputer technology, and mechatronics
2013
Social Sciences Programme
Grundtviggymnasiet Eslöv