Sebastian Baar

Sebastian Baar

Full-Stack Software Engineer & Architect

Work Experience

Head of Mobile Development - Handelsblatt Media Group (2024 - Present)

Software Architect Mobile (CPSA-F) - Handelsblatt Media Group (2020 - 2023)

iOS Developer - Handelsblatt Media Group (2019 - 2023)

Software Engineer - Cornelsen Verlag (2016 - 2018)

Wissenschaftliche Hilfskraft - Westfälische Wilhelms-Universität Münster (2014 - 2016)

Studentische Hilfskraft - Westfälische Wilhelms-Universität Münster (2014)

IT-Service Coordinator - National-Bank AG (2010 - 2013)

Latest Projects

Quick Collages App Icon

Quick Collages - iOS App

iOS SwiftUI Combine

If you want to create a college of your photos quickly and easily - without any annoying sign-up or in-app purchases - then the "Quick Collage" app is just right for you.
Simply select a template, insert your own photos, make adjustments, and you're done.

The app is constantly being expanded and getting more and more features. So far, it includes:

  • 10 collage templates
  • freely adjustable background color
  • adjustable frame thickness
  • ability to save collage templates as favorites
  • ability to save finished collages, send them via email, print them, or share them with friends

Find out more [english]
Find out more [german]



iOS SwiftUI UIKit SPM Swift Package Manager

Quickly preview local and remote files and their content using Apple's QuickLook Framework.

This package provides a wrapper around Apple's QuickLook Framework.

  • Can preview:
    • iWork and Microsoft Office documents
    • Images
    • Live Photos
    • Text files
    • PDFs
    • Audio and video files
    • Augmented reality objects that use the USDZ file format (iOS and iPadOS only)
    • ZIP files
    • ...
  • Can be used with UIKit or SwiftUI.
  • Can be used to preview one or multiple files at once.
  • Can be used with local file URLs or external URLs (it also handels downloading the files).

You can find this package on Swift Package Index and on Swift Package Registry.

Find out more

Angelprüfung Brandenburg App Icon

Angelprüfung Brandenburg - iOS & Android App [German only]

iOS Android Firebase Swift UIKit CoreData Kotline Java Room

Die App "Angelprüfung Brandenburg" enthält alle amtlichen Prüfungsfragen der theoretischen Fischereiprüfung des Landes Brandenburg.

Die App unterstützt beim Lernen für die theoretische Fischereiprüfung durch:

  • strukturiertes Lernen aller Sachgebiete
  • Prüfungssimulationen mit wechselnden Testfragen und realistischem Zeitlimit
  • detaillierte Statistiken deiner Vorbereitung und der simulierten Prüfungen
  • Speichern schwieriger Fragen in der Merkliste für gezielteres Lernen

Jetzt bei Google Play

Find out more

Cordova NativeGeocoder plugin

Cordova NativeGeocoder Plugin

Cordova Ionic Swift Kotline JavaScript

Cordova plugin for native forward (transform an address into a latitude and longitude) and reverse (transform a latitude and longitude into an address) geocoding using iOS CoreLocation service (Swift) and Android Geocoder class.

No need for creating API keys or querying external APIs!

The Cordova Native Geocoder Plugin for forward and reverse geocoding is also available on Ionic Native - a TypeScript wrapper for Cordova/PhoneGap plugins.

Find out more