Status: Active & Exploring

MARINPESA

Python Backend Developer

Developing backend applications and AI projects with Python, blending infrastructure expertise with software engineering.

Explore Projects Get in Touch

FirewallProxmox VEAzureIntuneVPN / VLANsWindows ServerPythonGoDockerGit

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DEVELOPMENT

The Mindset.

Transitioning from infrastructure expertise to backend development.

I'm building a strong foundation in Python and modern backend architectures. From managing enterprise systems to writing scalable code, I bring a systems engineer's mindset to software development.

Core Competencies

Python DevelopmentBackend ArchitectureSystems DesignCloud InfrastructureDevOps & DockerIT Security

Experience

IT Systems Integrator

IT-Sued

07/2025 - Present · Oberessendorf, BW

›Independently managing 50-100 client sites as primary technical contact for medical practices and SMBs
›Planning, configuring, and commissioning complete network infrastructures (switching, routing, VLANs, VPN, site-to-site)
›30+ firewall implementations and migrations with Securepoint, WatchGuard, and UniFi
›Microsoft Azure & Intune administration, device enrollment (Windows, macOS, Android), user management, policy configuration for ~100 devices
›Building virtualisation environments with Proxmox VE, VM migrations (Hyper-V → Proxmox), backup strategies with Proxmox Backup Server + Synology NAS
›Windows Server & macOS/iOS administration via Apple Business Manager

Apprentice, IT Systems Integration

IT-Sued

2022 - 2025 · Biberach, BW

›IHK final project: planning and building a complete network infrastructure for a medical practice, from concept to commissioning and documentation
›Gained solid knowledge in networking, server administration, virtualisation, and IT security

Skills

Expertise Areas

Network & Infrastructure

VLANsVPN (Site-to-Site, Remote)UniFiSecurepointWatchGuardRouting & SwitchingStandortvernetzung

Server & Virtualisation

Windows ServerProxmox VEHyper-VActive DirectoryProxmox Backup ServerSynology NAS

Cloud & MDM

Microsoft AzureMicrosoft IntuneApple Business ManagerOffice 365macOS / iOS

Development

PythonGoDockerGit / GitHubBackend Development

Education & Courses

FOS BOS Memmingen

International Business Studies

2022

BBZ Memmingen

Secondary School, Business & Languages

2021

Boot.dev

Backend Developer Career Path

Ongoing

Languages

CroatianNative

GermanFluent

EnglishBusiness Fluent

Project Reel

Curated Solutions

JavaScript

Lumiq

Daily logic puzzle app with nine puzzle types, published on the App Store. One React codebase ships to iOS and Android through Capacitor, with cloud sync, streaks and offline play.

ProblemI wanted a daily puzzle app that keeps working offline and still syncs across devices, and I wanted to find out what it actually takes to get an app through Apple review.

OutcomeLive on the App Store since September 2026. Account deletion runs through my own FastAPI service on Cloud Run that verifies Firebase tokens server side, and the project is covered by 655 tests.

App Store

JavaScript

TravelMap

Interactive world map for visited countries, wishlists and places you used to live, published on the App Store. Friends can view each other's maps or fill one in together as a group.

ProblemNo simple tool existed to put my travel history on a real map with country level and city level tracking in one place, and none of them let friends share a map.

OutcomeLive on the App Store since September 2026. Written in plain JavaScript with no bundler, wrapped natively with Capacitor, and usable offline: writes go through without waiting for the server and city search runs from a local dataset.

Code App Store

Python

AI-Agent

An autonomous AI agent built with Python and Google Gemini. Designed to handle multi-step tasks using tool calls and conversational reasoning.

ProblemNo lightweight, hands-on example of a tool-using LLM agent existed in Python that I could actually learn from by reading the code.

OutcomeLearned how multi-step tool-call loops work, prompt chaining, and how to structure agents around a conversation context.

Code

Python

Asteroids

A Python recreation of the classic Asteroids arcade game. Built to practice game-loop logic, collision detection, and object-oriented design.

ProblemNeeded a concrete project to practice OOP fundamentals and understand how game loops and collision detection actually work under the hood.

OutcomeSolid grasp of game loop architecture, event handling, and object-oriented design patterns in Python.

Code

PESA

Let's Work Together

Interested in working with me on infrastructure, cloud, or backend projects? Get in touch.

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