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Biography
i have over three decades of software development experience covering a wide range of environments, systems, methods and philosophies that passed by or stayed over the years.
And still: i am hungry for more.
Since 2012 my passion is development for Apple platforms. Mainly iOS / iPadOS but also macOS, watchOS and tvOS focusing on Swift / SwiftUI but coming from an Objective-C background.
fluent with
- XCode > 10 years
- Swift 5 years
- SwiftUI 2 years
- Objective C 9 years
- Core Data / SQLite 9 years
- AppKit / UIKit 9 years
- Cocoa 9 years
- git
- REST
- API
- UI Design
- Testing (XCTest) 4 years
- UNIX-Shell > 20 years
- Progress OpenEdge ABL > 20 years
- proALPHA > 10 years
familiar with
- PHP > 10 years
- CakePHP 8 years
- Github / Gitlab
- Databases / MySQL, Progress > 20 years
- fastlane
- CocoaPods
- Java Messaging (SonicMQ)
- Firebase / Crashlytics / Sentry
- HockeyApp / App Center
- OpenAPI / Swagger
- Scrum
- SonarQube
- Continous Integration
- Jenkins
- HTML
- JSON / XML
- openHAB
- Hugo.io
- Jekyll
- Homebrew
- Wordpress
- many more…
Tools
- Jetbrains
- Postman
- MAMP
- Confluence
- Jira
- many more…
Interests
- AI
- GraphQL
- Kotlin
in earlier times
- Perl
- Filemaker
- ABAP
- Sculptor
languages
- Deutsch native
- Englisch good
- French basics
hobbies
- photography
- travel
- coding
Experience
self employed
Thallos Software — Development Lead
Responsibilities include:
- AquaCalculator - the number one App for enthusiatic reefer (iOS / macOS). Subscription based solution with a couple thousand active users and a few hundred positive feedbacks on the AppStore (adding up the older non-subscription based app and the new subscription based)
- a self hosted CakePHP backend connected via a REST API to the AquaCalculator App
- aPedia - Aquarium Encyclopedia - an App (iOS / macOS (Catalyst)) providing Information about animals you might want to keep care of in your aquarium. Designed to work with AquaCalculator. Technically an App done completely in SwiftUI. Incorporates a massive administrative layer for gathering and enriching data from various REST-APIs
- Photowunder / GPSFix - (iOS / macOS (Catalyst)). An App to help you fix your missing or false location data in your Photos Library.
- some smaller apps active in the AppStore
- the websites www.acalc.de, www.aquacalculator.com and www.thallos.de
Senior Software Developer
hagebau IT
senior (full-stack) developer at hagebau IT. Currently working on our customized proALPHA based ERP solution prohibis covering a wide range of not just technical topics. Windows based frontend. Linux database- / appserver.
Responsibilities include:
- ERP expert covering a wide range of topics: Warehouse Management, Inventory Control, Product Information Management, Mobile Data Entry, Distribution, Purchasing, Management Information System, Disposal Processing
- Since 2021 Development of new middleware for master data management at hagebau headquarters <-> shareholder systems based on Java.
- since 2014 Development Lead API to the external warehouse management pL-Store of proLogistik via SonicMQ.
- 2012 Development Lead New MDE (Mobile Data Entry)
- 2011 API for external tour planning system Tourbo.route of Tourbosoft via SonicMQ
- 2011 prohibis b2b based on Webspeed / prohibis backend (https://shop.holzzentrum.de)
- 2009 hagebau / ZEUS Hazardous substances database (https://gwu.hagebau.com) based on Progress OpenEdge and Progress Webspeed
- 2008 Development hagebau topas for prohibis / ZART. Central article master for wholesale.
- since 2003 Development of prohibis on the basis of proALPHA / integration of hagebau functions
- 2002 New development Web interface ZART (https://zart.hagebau.com) based on Progress Webspeed. Central interface for controlling article change services / article information system.
- 2001 New development ZART based on Progress OpenEdge ADM2. In-house solution for central article master data maintenance (ZART) Retail of the hagebau Group
- 1999 Development SAP / ABAP. Introduction SAP / customising / programming hagebau adjustments
- 1998 ERP hawis based on Sculptor (SCO Unix). Development of the hagebau ERP system for retail.
- 1996 ERP hibis based on Progress 4GL (Unix). Development of the hagebau ERP system for wholesage.
apprenticeship
Gruner + Jahr
some early contacts with the apple world but also some pc stuff.
Responsibilities include:
- developing FileMaker seminar management app
- for the canteen: tranfering a lotus 123 file recipe collection to a database
- first contact with “the internet”
school
Fachgymnasium Wirtschaft in Soltau
Abitur / Allgemeine Hochschulreife