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Werner Altewischer

Werner Altewischer

Arnhem, Netherlands
Member since June 26, 2017
With an M.Sc. in physics and practical experience in robot soccer, Werner started his IT career as a Java back-end developer in 2002. He's contributed to startups in Silicon Valley and elsewhere, and has been freelancing for the better part of a decade—mainly on iOS apps but also maintaining his chops in Java on the side. He has experience in Scrum and Agile environments and on teams of all sizes.
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Portfolio
Experience
  • Java, 15 years
  • iOS, 9 years
  • Objective-C, 9 years
  • Scrum, 8 years
  • Core Java (J2EE), 7 years
  • Spring REST, 5 years
  • Hibernate ORM, 5 years
  • Swift, 2 years
Arnhem, Netherlands
Availability
Part-time
Preferred Environment
MacOS, Git, IntelliJ, AppCode, Xcode, JIRA
The most amazing...
...project I've worked on was within my startup company Layerstream, building a real-time scalable video codec extension based on FFmpeg.
Employment
  • Lead iOS Developer/Architect
    2013 - 2017
    Ahold
    • Implemented a universal iPad/iPhone application for the biggest supermarket company in the Netherlands for browsing products and special offers, creating delivery/pickup orders, guidance within the supermarket, and much more.
    • Contributed to the mobile services back-end implemented in Java using Spring.
    • Contributed to the Allerhande Koken iPad app which won a design award in The Netherlands, an app for cooking recipes.
    • Extended my open source BMCommons framework for creating iOS applications (available on GitHub). Used by all Ahold apps.
    • Worked in a Scrum team as lead developer.
    Technologies: Objective-C, Swift
  • CTO
    2011 - 2016
    Behind Media
    • Co-founded the startup Behind Media for the creation of an app platform called BehindTheFrontDoor, a leaderboard for talent.
    • Designed and developed BehindTheFrontDoor's server-side functions and iPhone app.
    • Developed several open source modules, including WEPopover and BMCommons, both of which are available on GitHub/Cocoapods.
    • Developed an iPhone app for JeromeFitness based on the same back-end and open source libraries.
    • Worked using Scrum methodology.
    Technologies: Java, Spring, Hibernate, JPA, Objective-C, iOS
  • iOS Developer/Architect
    2012 - 2013
    Lukkien
    • Implemented a corporate iPad application for a root maintenance company to log and plan maintenance work.
    • Worked in a small Scrum team of two developers, a designer, and a project leader.
    • Implemented an asynchronous synchronization mechanism to avoid the app needing internet at every moment.
    • Contributed to the Python based REST back-end for the application.
    Technologies: Objective-C
  • Technical Consultant
    2012 - 2012
    Cygnet
    • Advised on implementation for a Java text search engine based on Lucene.
    Technologies: Java, Lucene
  • iOS Developer/Architect
    2010 - 2012
    KLM
    • Implemented the KLM customer facing app for searching and booking flight tickets, electronic boarding, etc.
    • Developed several internal iPad applications for both the cabin crew and the flight crew and an internal Wiki for all personnel.
    • Worked in a team using Scrum methodology.
    Technologies: iOS, Objective-C
  • iOS Developer
    2011 - 2011
    Coz Marketing
    • Implemented a contact management application for a company named VCP containing media and in-app purchasing functionality.
    Technologies: iOS, Objective-C
  • iOS Developer/Architect
    2010 - 2011
    ShareWire
    • Implemented the Greetz iPhone app, an application to design greeting cards on the mobile phone, containing optional sound, stickers, photos, and custom drawings/writings with effects and transforms.
    • Implemented a payment system connecting to different payment providers, such as Ideal, different credit cards, and PayPal.
    • Handled technical implementation of all parts of the app.
    • Won the award Best Mobile Webshop with the Greetz app.
    Technologies: iOS, Objective-C
  • iOS Developer
    2009 - 2010
    Global Motion
    • Implemented the 3.x an 4.x versions of the iPhone app for EveryTrail, a GPS tracking and trip sharing application, integrating with the EveryTrail website.
    • Contributed to the acquisition of the company Global Motion by TripAdvisor.
    • Worked mostly remotely in a small team of one other developer, a designer, and a project leader using video communication methods.
    Technologies: iOS, Objective-C
  • iOS Developer, Platform Architect
    2008 - 2009
    Global Motion
    • Set up the development environment with issue tracking, source control, automatic deployment, and a documentation system.
    • Advised on architecture of the platform, technical choices, and development strategies.
    • Implemented the first version of the EveryTrail iPhone application for recording and sharing GPS track data using the EveryTrail web platform.
    • Implemented several side applications, such as Wherester, BikeComputer, SkiComputer, and GeoTagging. All applications relied on GPS tracking and sharing with EveryTrail.
    Technologies: iOS, Objective-C
  • Java Back-end Lead Developer/Architect
    2008 - 2009
    Impressie
    • Professionalized the working environment by setting up source control, issue tracking, and documentation systems, and set up automatic builds and deployments.
    • Architected and implemented the core product of Impressie, called Impressie Publisher: a content management system based on Spring/MySQL and Lucene for text search.
    • Created documentation and led junior developers.
    Technologies: Spring, MySQL, Lucene
  • Co-founder and Video Expert
    2007 - 2008
    Layerstream
    • Co-founded Layerstream, a startup company working on technology for optimized real-time video streaming over unreliable networks (such as the internet).
    • Worked on extensions to existing video codecs for scalable video coding (SVC), mostly based on FFmpeg.
    • Contributed to the Windows based demo video player based on C#.
    • Did some business development by talking to potential strategic partners, attending VC meetings and other events in the Silicon Valley region.
    • Contributed to the Java based router software components.
    Technologies: Java, C#, C, Video codecs (MPEG-4 FGS, H264 SVC)
  • Java Developer
    2004 - 2007
    MarketXS
    • Implemented the Java-based UserXS application, an authentication and authorization application exposing a SOAP API over HTTPS.
    • Contributed to other parts of the MarketXS finance engine platform, an architecture to distribute real-time financial market data across the internet. MarketXS was acquired by Markit in 2006, after being the fastest growing technology company in the Benelux within the period 2000-2005.
    Technologies: Java, J2EE, JDO, SOAP
  • Java Back-end Developer
    2002 - 2004
    Nuon
    • Contributed to the development of the Nuon service broker, an internal J2EE based SOAP architecture to connect different back-end and front-end systems within Nuon.
    • Contributed to the migration of Windows NT servers to Unix servers.
    • Worked on the implementation of a new Siebel/SAP-based CRM application for the Nuon energy company.
    Technologies: Java, J2EE, WebLogic, SOAP
  • Software Developer
    1998 - 2002
    Impressie
    • Contributed to the automation of different types of text conversions for creating searchable text archives.
    • Performed hardware and software installations and configurations.
    • Developed in different programming languages and tools such as Java, Visual Basic (for applications), C++, Javascript, HTML, and XML.
    Technologies: Visual Basic for Applications, C++
Experience
  • BMCommons Framework for iOS Applications (Development)
    https://github.com/werner77/BMCommons

    An open source framework solving/simplifying many of the common problems in creating an iOS application.

    It supplies many utility functions, a REST engine, UI extensions, base classes for view controllers, and much more.

  • WEPopover Component for iOS (Development)
    https://github.com/werner77/WEPopover

    An iPhone UI component mimicking the iPad UIPopoverController for pop-over views in a phone application.

  • Appie Universal iOS App for Shopping in the Biggest Supermarket in NL (Development)
    https://itunes.apple.com/nl/app/appie-van-albert-heijn/id327535329?mt=8

    An iOS app, built for both iPad and iPhone and incorporating a web shop to shop at the biggest supermarket in the Netherlands and to help during your offline shopping journey with many utilities, such as a bar code scanner, a wine selection utility, recipe search/browse, bargain search/browse, shopping list optimization for a given walking route, etc.

Skills
  • Languages
    Java, Swift, Objective-C, C, Core Java (J2EE), C#, C++, Ruby, SQL
  • Frameworks
    iOS SDK, Hibernate ORM, OAuth2, Spring Security, Spring MVC, Spring
  • Libraries/APIs
    Spring REST, Lucene, Hibernate Search
  • Tools
    Xcode, AppCode, IntelliJ IDEA, Calabash, RubyMine
  • Paradigms
    REST, Agile, Scrum, Concurrent Programming
  • Platforms
    Mac OS, iOS, Linux, Amazon Web Services (AWS)
  • Storage
    Spring Data REST, Spring Data JPA, HSQL, MySQL
  • Other
    Data Structures, Algorithms, Linux Server Administration, J2EE Design Patterns, SOAP, Video Compression, Video codecs, Bash Scripting
Education
  • Sun Certified Web Component Developer in Java Web Programming
    2007 - 2007
    Prometric - Amsterdam
  • Sun Certified Programmer in Java 5
    2007 - 2007
    Prometric - Amsterdam
  • Sun Certified Java Programmer in Java 1.4
    2003 - 2003
    Azlan - Amsterdam
  • Certificate WLS-D21-70 in Developing Enterprise Applications with BEA WebLogic
    2002 - 2002
    BEA - Amstelveen
  • Master's degree in Applied Physics
    1995 - 2002
    University of Technology Delft - Delft
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