Hello, I'm

Mountaser Halak

Systems Administration · IT Support · Network Technology
State-certified Technical Assistant for Information and Communication Technology
B.Sc. Business Information Systems and Digital Media, HdM Stuttgart

I build systems that didn't exist before – from custom Android kernels to homelabs built out of repurposed hardware.

Systems Administration Linux & Windows Server Network Technology Virtualization CI/CD & Automation Android / AOSP
Portrait of Mountaser Halak

About Me

I am someone who cannot leave a technical problem unresolved until it works seamlessly. Almost everything I know technically, I taught myself – because I wanted to build something that didn't exist yet: a custom Android system for a device the manufacturer had long abandoned, or a homelab server built from decommissioned hardware that grew into a full personal infrastructure.

Today that means: administering Linux and Windows servers, planning and securing networks, hosting containerized services, and automating builds via CI/CD pipelines. This is complemented by the hardware side – from soldering and microsoldering repairs to custom embedded electronics projects. What drives me is not just individual technologies, but understanding how a system truly works under the hood and having the persistence to achieve a clean solution.

In my Business Information Systems studies, I combine this technical depth with organizational structure: understanding requirements, documenting them clearly, and communicating complex technical concepts so they are easy to understand even without an IT background.

LocationStuttgart Area, Germany
EducationB.Sc. Business Information Systems & Digital Media, HdM Stuttgart – Expected Graduation 02/2029
LanguagesGerman – Business FluentEnglish – Business Fluent (C1)Arabic – Native
AvailabilityAvailable immediately as a working student (20 hrs/week) · Full-time available until Sept 30, 2026

Technical Skills

Windows Server

Active DirectoryGroup PolicyDNSDHCPFirewallRoutingBatch Scripting

Linux

DebianUbuntuArchServer AdminBashShell ScriptingNginxRaspberry Pi

Virtualization & Containers

VMware vSphere / ESXiVMware WorkstationKVM/QEMUUnraidDockerReverse ProxySelf-Hosting

Development & Automation

GitGitHub / GitLabJenkins CI/CDCode ReviewsC / C++JavaJavaScriptPythonBash

Networking & Storage

RoutingFirewallPi-hole DNSDynamic DNSVPN (WireGuard / OpenVPN)TLS / Let’s EncryptNASRAID 0–10ZFSSnapshots & Backup

Android / AOSP

Custom BuildsKernel DevelopmentDevice TreesSELinux

Embedded & Hardware

Arduino / ESPRaspberry PiHome AssistantSoldering & MicrosolderingPC & Server Hardware

AI & Agents

GPTGeminiClaudeOpenRouterOllamaDeepSeekMulti-Agent Workflows

Design & Media

PhotoshopInDesignPremiere ProAfter Effects

Work Experience

11.2023 – 06.2026

Ticket Inspector & Passenger Service · DB Regio AG

Working student role via Job Valley staffing agency, approximately 2.5 years alongside full-time university studies. Ticket inspection and passenger service throughout the VVS transit network – confident, customer-oriented communication even in high-conflict situations.

07.2023 – 09.2023

Passenger Information & Promotion · DB Regio AG

Passenger guidance and assistance during the main railway line (Stammstrecke) closure in the VVS network.

03.2023 – 07.2023

Student Auxiliary Roles in Retail & Reception

Cashier and customer service at GALERIA Karstadt Kaufhof. Additional assignments: dm-drogerie markt · GEHE Pharma Handel · Modehaus Zinser

Education

since 10.2025

B.Sc. Business Information Systems and Digital Media · Stuttgart Media University (HdM)

Standard study period 7 semesters, on schedule – expected graduation 02/2029.

2022 – 2025

B.Eng. Computer Engineering · Esslingen University of Applied Sciences

Transferred program to Stuttgart Media University.

2020 – 2022

Vocational College for Information & Communication Technology · DAA Stuttgart

Graduation: Higher Education Entrance Qualification (Fachhochschulreife) and official title "State-certified Technical Assistant for Information and Communication Technology". Final Capstone Project: RFID Security System (Grade: Very Good / 1.0).

Projects & Community

Moun Kernel

Custom Android kernel featuring four configurable CPU governor profiles to optimize battery life and performance. Automated nightly builds powered by Jenkins.

CAndroid KernelJenkins CI/CD

Resurrection Remix

Official AOSP-based Custom ROM builds for end-of-life devices, maintaining up to 10 devices simultaneously: device trees, vendor binaries, and build debugging.

Awarded XDA Recognized Developer title on May 9, 2018.

AOSPDevice TreesVendor Binaries

Homelab & Self-Hosting

Custom-built homelab server running Unraid with virtual machines and Docker containers: Nginx reverse proxy, network-wide Pi-hole DNS, Dynamic DNS, photo and media services. Home Assistant controls smart home devices locally, exposed securely via HTTPS over custom domain. This website runs on it as well.

UnraidDockerNginxPi-holeHTTPS/TLS

Client Radio App Customization

Client project: customized a commercial Android radio app to match client branding – logos, color schemes, text, themes, and navigation – and added custom features including video splash screen, direct web/social links, streaming API integration, and Firebase/OneSignal push notifications.

AndroidFirebaseOneSignalStreaming API

Source code private (commercial client project).

RFID Security System

Graduation capstone project at Vocational College for Information & Communication Technology (Grade: Very Good / 1.0): Arduino/ESP-based access control system with RFID readers – from circuit design and wiring to firmware and written documentation.

Arduino / ESPRFIDEmbedded C

AI Agents & LLM Tooling

Ongoing practical work with Large Language Models: leveraging GPT, Gemini, and Claude via API and OpenRouter, plus locally hosted models via Ollama and DeepSeek. Built custom agent configurations, multi-provider sub-agents, and automated workflows for recurring tasks.

GPT / Claude / GeminiOllamaMulti-Agent Workflows

Personal Tech Video Channel

Produced personal video content on Android system software and PC hardware over several years: technical explainers on custom ROMs, Project Treble, OS installations, and CPU/hardware comparisons. Solo production covering scriptwriting, camera, video editing, audio, motion graphics, and live streaming. Core mission: explaining complex technical topics clearly to non-technical audiences.

Video ProductionEditing & Motion DesignTechnical Communication