freiberufler Full Stack Developer auf freelance.de

Full Stack Developer

online
  • auf Anfrage
  • 44809 Bochum
  • DACH-Region
  • de  |  en
  • 21.01.2025

Kurzvorstellung

Ich kann Anwendungen konzeptionieren, entwickeln und Bereitstellen. Mein Fokus sind Webanwendungen mit Datenbanken als Blazor-Anwendungen.

Qualifikationen

  • .Net
  • ASP.NET4 J.
  • Blazor
  • C#8 J.
  • Entity Framework11 J.
  • JavaScript12 J.
  • Microsoft Azure
  • Microsoft SQL-Server (MS SQL)8 J.
  • React (JavaScript library)8 J.
  • Typescript8 J.

Projekt‐ & Berufserfahrung

Sole developer
public:health, Köln
4/2021 – offen (3 Jahre, 10 Monate)
Gesundheitswesen
Tätigkeitszeitraum

4/2021 – offen

Tätigkeitsbeschreibung

I find myself again to be the only developer of a new company; public:health provides a fraud-finding tool based on German COVID testing data provided by software providers for test centers.
I always look for the right tool for the job and in this case, I’ve been pushing for the use of Tableau for data visualization and exploration – instead of trying to build something custom.

Eingesetzte Qualifikationen

Tableau, Microsoft SQL-Server (MS SQL), .NET-Entwickler, Entity Framework, Typescript, JavaScript, React (JavaScript library)

Developer
AGKAMED, Essen
5/2016 – 7/2018 (2 Jahre, 3 Monate)
Gesundheitswesen
Tätigkeitszeitraum

5/2016 – 7/2018

Tätigkeitsbeschreibung

AGKAMED is a purchasing cooperative acquiring medical supplies on behalf of hospitals. I was asked to develop an in-house application to support administrative, data import and data analysis tasks.

Eingesetzte Qualifikationen

Microsoft SQL-Server (MS SQL), C#, Entity Framework, ASP.NET

CTO (Festanstellung)
VisBricks, Witten
1/2016 – 3/2020 (4 Jahre, 3 Monate)
Medienbranche
Tätigkeitszeitraum

1/2016 – 3/2020

Tätigkeitsbeschreibung

VisBricks is an After Effects automation I created that allows to create videos from templates by providing a user interface for entering texts and images that are then used to manipulate an After Effects project file and render a customized video.
I successfully implemented workflows for different business models, among them a system to resell YouTube ads.
This was the first time I got an additional coder, and this colleague turned out to be very resourceful. He was eventually able to replace me in my role as the primary maintainer of the software.

Eingesetzte Qualifikationen

Microsoft SQL-Server (MS SQL), C#, Entity Framework, Typescript, ASP.NET, JavaScript, React (JavaScript library)

Developer
Concertis, Bochum
4/2015 – 12/2015 (9 Monate)
IT & Entwicklung
Tätigkeitszeitraum

4/2015 – 12/2015

Tätigkeitsbeschreibung

IS+ by Concertis is an LOB application for educational institutions I did some freelance work for. Among other things, I extended their custom data access layer to hide certain archived data for the app to comply with new data protection laws. A rework of their application theme that I started on my own initiative was also eventually ordered.

Eingesetzte Qualifikationen

Microsoft SQL-Server (MS SQL), C# Developer

Developer
CredoTrack, Dortmund
2/2012 – 4/2015 (3 Jahre, 3 Monate)
IT & Entwicklung
Tätigkeitszeitraum

2/2012 – 4/2015

Tätigkeitsbeschreibung

Following an idea by my entrepreneur friend, I developed a signage solution. It only lived for a brief time, but it birthed VisBricks, a technology to create videos from templates.

Eingesetzte Qualifikationen

C#, Entity Framework, Windows Presentation Foundation, Microsoft Silverlight

Developer
SECTOR Cert, Köln
8/2011 – 2/2015 (3 Jahre, 7 Monate)
Zerstörungsfreie Prüfung
Tätigkeitszeitraum

8/2011 – 2/2015

Tätigkeitsbeschreibung

My business partner gave me this unfinished project from a previous developer. It taught me never to trust other people’s estimates of how complete a given project already is and what the customer thinks it will be doing. It did indeed eventually replace their previous database software.

Eingesetzte Qualifikationen

C#, Entity Framework, Windows Presentation Foundation, Microsoft Silverlight

Developer (Festanstellung)
Transversal, Cambridge
11/2004 – 7/2009 (4 Jahre, 9 Monate)
IT & Entwicklung
Tätigkeitszeitraum

11/2004 – 7/2009

Tätigkeitsbeschreibung

As part of a team of half a dozen developers, I was working on an existing CMS specialized in natural language search.
Among the many tasks I was given was the implementation of a „Google Ads“-type feature for showing ads related to search queries and a lot of UI work in the backend.
My most valuable contributions, however, were those started on my own initiative, such as a tool to manage translations and a type-safe HTML framework.

Eingesetzte Qualifikationen

Apache, C++, Java (allg.), JavaScript, Mysql, Python

Ausbildung

Dipl.-Math.
Diplom
Universität Dortmund
2004
Dortmund

Persönliche Daten

Sprache
  • Deutsch (Muttersprache)
  • Englisch (Fließend)
Reisebereitschaft
DACH-Region
Arbeitserlaubnis
  • Europäische Union
Home-Office
bevorzugt
Profilaufrufe
124
Alter
46
Berufserfahrung
20 Jahre und 2 Monate (seit 11/2004)
Projektleitung
3 Jahre

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