Recent Software

twiamo.com

Twiamo is a friendship management app for Twitter. It uses metrics and keywords that allow users to quickly assess the value of other Twitter users.

Twiamo is build as a progressive web-app; a mobile-first application that feels and behaves like a native mobile app, but does not require installation or updates.

Java, GWT, App Engine, Cloud Storage, Javascript, Web Components, Polymer, Twitter API, REST

XRAW

XRAW is a programming framework that allows to use any existing REST API within a JVM environment in a type-safe manner. It uses active annotations to alter the semantics of Java classes and fields to represent remote resources as if they were local data.

Twiamo comes with small excerpts of the APIs for the larger social networks Twitter, Facebook, YouTube, and Tumblr. It can easily be extended by defining types for requests and resources of more existing APIs or to create type-safe client libraries for APIs build from scratch.

XRAW is compatible with GWT and can be used for web app clients, Android, or regular desktop apps. It is open source and distributed as a maven module.

Java, Xtend, JSON, REST, Twitter, Facebook, Youtube, Tumblr, Maven

Apps & Games

Smartphone apps and app stores are probably one of the most distruptive things in the last decade that any programmer has to try build for. I experimented with a variety of platforms and technologies. I developed and published apps and games for both iOS and Android.

LibGDX, Unity, Java, C#, Android, iOS

Research Projects

Large Software Models

Increasingly complex software systems, require increasingly complext software models. Large models are traditianlly managed with SQL database persistent layers. However, SQL databases do not scale enough or are otherwiese indadequate due to the graph-like nature of software models in certain application contexts.

EMF-Fragments [ ] is a NoSQL persistent layer for EMF models. With EMF-Fragments, I explored the scalebility properties of a fragmentation-based persistence that facilitates the nature of document databases like mongoDB.

On application for these large software models is model-based mininig of source code repositories. SrcRepo [ ] uses reverse engineering to create large abstract syntax trees models of whole source code repositories comprising all branches and revisions of code.

Eclipse, EMF, Reverse Engineering, Java, Metrics, Data Mining, Statistics, MongoDB, NoSQL, Git

Sensor Networks

To understand the possibilities of wireless sensor networks for smart cities, we created and experimented with the HWL, a heteregenous 300 node wireless mesh network equipped with seismic sensors on the Humboldt University research campus in Berlin.

To manage the network, configure its software components, and process the large ammounts of different data, I developed the clickwatch framework. Clickwatch [    ] represents data, configurations, and changes in an MIT Click-driven network in a singlular visual model; allows to manage, persist, and analyse this data.

Eclipse, EMF, XML, Statistics, MongoDB, NoSQL, WIFI, Networks, Click

DSLs

In contrast to general purpose computer languages, domain specific languages (DSL) are tailored for a specific application domain. While limited in scope, they adhere to the specific conventions and vocabulary of a specific domain and therefore allow for more precise, more readable, and more accessible expression. Often DSLs aspire to allow domain experts that have only a limited software engineering background to make meaningful contributions.

The Textual Editing Framework (TEF) [ ] is my contribution to the rich DSL ecosystem. In contrast to similar frameworks like Xtext, TEF allows for dynamic syntaxes that can change within a running IDE and intergates particularely well with other types of editors.

Eclipse, EMF, Xtext, GMF, Domain Modeling

Publications

Technical reports

Review/chair activities

  • 17th International Conference on System Design Languages: SDL Forum 2015, Chair
  • BigMDE Workshop at STAF, 2013-2015, PC
  • Modevva Workshop at Models, 2012-2015, PC
  • EXE Workshop at Models, 2015, PC
  • DSML Workshop at Modellierung, 2008, Chair
  • International Journal on Software and Systems Modeling, Springer, Reviewer

Awards

  • DFG schoolarship as part of the Graduiertenkollegs METRIK at the Humboldt-Universität zu Berlin, April 2006
  • schoolarship granted by the city Berlin following the Nachwuchsförderungsgesetzt (NaFöG) in 2005 and 2006
  • Institutspreis of the Instituts für Informatik (HU Berlin) awarded for the best master thesis, Juli 2004

Theses

Experience

Skills

Brief CV

  • since 2011 post-doc at Humboldt-Universität zu Berlin
  • 2009 until 2010 consultant for the adesso AG
  • Spring 2007 visiting researcher at Adger University, Norway
  • 2005—2009 PhD student at the Humboldt-Universität zu Berlin
  • Fall 2003 research internship at the NEC Research Laboratories, New Jersey
  • November 2002—June 2003 software developer at the DResearch GmbH, development of telecommunication protocol handlers for the Siemens AG
  • August 1999—November 2001 software developer for the Infopark AG
  • since fall 1998 student of computer science at the Humboldt-Universität zu Berlin

I worked for