Application · Dual Computer Science Degree · Winter Term 2027

Backend since
8th grade.

I have been developing in Java since 2016, from my first plugin to my own cloud cluster system for servers with thousands of concurrent players. Then came a detour through sales. Now I am returning to where I belong: Fachhochschulreife in computer science, followed by a dual degree. And for that, I am looking for a practice partner.

01My Path

It all started in 2016, in 8th grade, with my own Minecraft servers: small gameplay plugins at first, then increasingly complex systems. The highlight came in 2018: my own cloud cluster system "Jarvis", a multi-module Maven project with Cassandra, Redis, load balancing and automated deployment via Jenkins, built for networks with several thousand concurrent players. That is where I learned what performance and concurrency mean under real load.

After school, my path led into business: an IHK retail apprenticeship in a furniture store, then sales and independently running the warehouse at a solar retailer, most recently two years of field sales at HEIM & HAUS. Not the direction my heart would have chosen, but a tough school in how to work. And the same pattern everywhere: after a short time, I was the internal go-to person for IT. In parallel, I worked as a junior application developer at IndieLemon GmbH & Co. KG, building Java applications for a network with thousands of concurrent users, simply out of longing for technology.

Now I am drawing the conclusion: from August 2026 I am back at school. At Schulzentrum Utbremen I am completing the Fachhochschulreife with a focus on computer science. The computer science department was pre-approved for me by the Bremen school authority based on my prior experience. I expect to graduate in June 2027. After that I want to combine both: the theoretical foundation from the degree and hands-on practice in a company. I am not starting from zero, I am finally starting my dream career.

Goal
Dual computer science degree from winter term 2027
Currently
Fachhochschulreife (IT focus), Schulzentrum Utbremen, until June 2027, advanced courses in maths & computer science
Experience
Java since 2016, working since 2019
Location
Bremen, Germany

02What I Work With

An honest inventory instead of buzzword bingo. This is what I use and what I am working on:

Backend & Data

  • Java (Spigot, Netty, Guava, Lombok)
  • PHP
  • MySQL
  • Cassandra (CQL)
  • Redis

Tools & Environment

  • Maven & Gradle
  • Git & GitHub
  • Jenkins (CI/CD)
  • IntelliJ IDEA
  • WebStorm
  • PhpStorm
  • Linux basics

Web

  • HTML & CSS
  • JavaScript
  • Node.js (learning)
  • React (learning)

From Seven Years of Work Life

  • Customer communication
  • Go-to person for IT
  • Negotiating & presenting
  • Resilience
  • Teamwork
  • Self-reliance & initiative
  • Solution-oriented thinking
  • Project work

Languages

  • German (native)
  • English (B1)

AI Models

  • Coding & prompting with Claude

03My Own Work

No rebuilt tutorials, just my own systems, public on GitHub:

Jarvis: Cloud Cluster System

Built in 2018 (V1) and 2020 (V3). A Minecraft server cloud on a cluster basis: multi-module Maven project with dedicated modules for Cassandra, Redis, configuration, console and cluster nodes. Automated deployment via Jenkins, load balancing, designed for thousands of concurrent players.

  • Java
  • Cassandra
  • Redis
  • Jenkins
  • Maven
View on GitHub

CoreSystem & JarvisAssistant

Built in 2018: the ecosystem components around Jarvis: a CoreSystem with its own game API for gameplay content, and an assistant API that talks to the cluster system. Designed modularly so individual parts can evolve independently.

  • Java
  • API-Design
  • Maven
View on GitHub

Live Monitoring Bot System

Built in 2021: a bot system for live monitoring of player activity, the step beyond the Minecraft ecosystem towards monitoring and automation.

  • Java
  • MySQL
  • Bots
projects.p3.link

saschathiesen.de

Built in 2026. This website: plain PHP without a framework, a single CSS file, bilingual via a small properties-based language layer. Deliberately built without a site builder, because I want to understand the web fundamentals from the ground up too.

  • PHP 8
  • CSS3
  • Vanilla JS
View source code

SMO Bauelemente GbR Website

Built in 2026: a promotional website for building elements, modular by design. The individual product pages such as awnings or patio roofs route to a single central product-page.php that manages all content in one place. Plus an integrated contact form.

  • PHP
  • MySQL
  • HTML & CSS
  • JS
View live

IndieLemon GmbH & Co. KG (GommeHD.net Minecraft network)

Application developer in a part-time role: extending gameplay content, building network-wide systems and reworking existing systems for network-wide availability.

  • Java
  • Spigot
  • Cassandra
GommeHD.net

04Career

  1. from winter term 2027

    Dual Computer Science Degree · Your company?

    I am looking for a practice partner who wants someone who has already learned how to work and is heading into their dream career full of enthusiasm.

  2. Aug 2026 to June 2027

    Fachhochschulreife, focus on computer science · Europaschule Schulzentrum SII Utbremen, Bremen

    Advanced courses in mathematics and computer science: programming, algorithms and data structures, databases, web and network technology. Pre-approved by the Bremen school authority based on prior programming experience.

  3. July 2024 to July 2026

    Field Sales Representative · HEIM & HAUS, Bremen area

    Cold calling, customer acquisition and sales of building elements, plus construction planning and consulting directly at the customer's home.

  4. Feb 2024 to Oct 2025

    Junior Application Developer (part-time) · IndieLemon GmbH & Co. KG

    Developing and extending Java applications for a network with thousands of concurrent users: Spigot, Cassandra, Maven & Gradle, Git, debugging and close collaboration with QA.

  5. Dec 2022 to June 2024

    Sales & Warehouse Management · SolarCamp24 GmbH, Bremerhaven

    Independently running the warehouse, maintaining the online shop, interface between sales and customer service, and before long the internal go-to person for IT.

  6. Aug 2019 to Nov 2022

    Apprenticeship & Furnishing Consultant · Opti-Wohnwelt, Schiffdorf-Spaden

    Apprenticeship as a retail salesman (IHK degree 2022), then taken on as a furnishing consultant. Here too: quickly the go-to person for anything with a plug or a login.

  7. 2018 to 2019

    Internship Year · Werkstattschule Bremerhaven

    Internships including six months at Opti-Wohnwelt, who then took me on as an apprentice.

  8. since 2016

    Java Development in My Free Time · Personal projects

    From my first Minecraft plugin in 8th grade to a cloud cluster system, continuously and alongside school and work.