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Sebastian G.SG

Sebastian G.

App and Software Developer

€650/day
Köln, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sebastian

Welcome to my profile! I am Sebastian, a travel enthusiast and developer of apps, websites, and software of all kinds.

I practically learned to walk with app development when I completed and published my first app in 2012. Since then, I've felt like I've accompanied almost all mobile platforms until their end and now specialize in iOS and Android. Using React Native as a TypeScript framework, I can write native apps in TypeScript/JS for both platforms and, if necessary, supplement them with truly native functions in Java and Swift/Objective-C.

In my work, efficiency is just as important to me as attention to detail: elements should be perfectly arranged on the screen, user guidance should be simple and self-explanatory, and at the same time, it shouldn't take forever to finish software. I achieve this without any hurdles - both alone in my own projects and together with partners and companies.

The project that has accompanied me from the beginning is my Formula 1 app "PitlaneOne". Currently available on iOS/Android and Windows 10/11, the app includes the complete history of Formula 1 in your pocket. At the same time, of course, all current results are always available. Especially with so much data, it's difficult to present it compactly and clearly, but I've managed this excellently over the past 11 years.

I look forward to collaborations of all kinds, as both sides can always take something away and learn from them. This is not limited to app development but also includes websites with PHP/Wordpress and React.js, where I have already implemented several projects.
  • German

    Native or bilingual

  • English

    Fluent

  • Polish

    Native or bilingual

  • Spanish

    Basic

Remote only
Primarily works remotely

Experience

  • Agribit Software Pty Ltd
    Application Developer (C#/Blazor)
    November 2023 - June 2024 (7 months)
    Continuous development of a payroll and management software used on Australian farms and developed in C#/XAML (WPF and Blazor).
  • Milk Interactive AG
    Mobile Application Developer
    January 2022 - January 2023 (1 year)
    Co-development of multiple mobile applications in Swift and React Native with special use of Bluetooth LE and CarPlay.
  • Discover GmbH
    Flight Attendant
    AVIATION AND AEROSPACE
    January 2021 - October 2022 (1 year and 9 months)
    Frankfurt, HE, Germany
    Accompanying of large and small guests on their vacation journey. Active design of processes during the foundation of an airline as well as security and service-oriented tasks for a special stay on board of the Eurowings Discover long-haul and medium-haul routes.

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Education

  • Bachelor of Science
    Hochschule Bonn-Rhein-Sieg
    2017
    Bachelor of Science - BS, Informatik

Skill set (18)

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