Portfolio

master diploma

 

Current CV in english (pdf).

Aktueller Lebenslauf auf Deutsch (pdf).

Scanned Diplom Urkunde from TUBS (pdf).
Scanned Master diploma from UTEP (pdf).

Scanned transcripts from TU-BS 1 (pdf), TUBS 2 (pdf), NMSU, UTEP 1, UTEP 2.

This is going to be a growing list of all code I have ever worked on, collaborated on or written over the years. I also included websites, presentations, occasional artsy projects (like logos), as well as papers and theses. Be it at universities for class projects, for my own private amusement, or at a company (if it is releasable that is). Some projects that are listed don’t include the source code, since I sadly don’t have it anymore, whereas others are under NDA (eg. developed for a client).

They are listed in chronological order by “project name“, date, place – class name (if applicable) or client, and language. I tried to include as much info as I could dig up, like class websites, syllabus, project descriptions and more (and archived/crawled the sites, lest they ever go away).

  • pre-95 /self /Basic
    My first ever piece of code, I still remember like it was yesterday. It was a moving wave simulator that I wrote in Basic which used basic graphic operations for drawing points. Back then, I did not know about arrays and loops, so I wrote hundreds of variables and statements for every change. We had a box-like Compaq which still had one of those orange monochrome displays ;) Didn’t keep it though :(
  • “Sockett”/99-2001/self/C++ Screenshot
    Vocational project to learn some C++ as well Windows API and socket programming. Its a small program that allows to open a listening socket or connect to another socket on another machine and send and receive data. It has a primitive GUI and was written under Windows 95, I think. It still works even on Vista/Win7 which I think is amazing, as well as in Wine under Mac OSX – from which I took the screenshot as you can see. Source.
  • ca. 98-2001/self/HTML logo
    Various versions of homepages for the Lorenz-Meyer family, first version was hosted on our Compuserve account space if you can believe it, then moved to other locations including (but not limited to) Geocities, f2s, xoom, and crosswinds as well as pix on angelfire. Basic HTML and some animated gifs ;) HTML V1 (zip), V2 (zip). A couple years ago I built a blog for the primary domain which lived on my friends server, which subsequently went offline. Current site on primary domain lorenz-meyer.de is a simple blog made by my uncle.
  • 2001/self/Photoshop dD
    Various logos for the Teelicht clan as well as other clans and logos. teelicht
    I also made a really cool (at least IMHO) intro in flash for the Darryl Musashi [DMC] clan, mimicking the famed Episode I trailer, which took me quite some time. Sadly some of my HDs crashed and I had never backed it up anywhere. DMC Selection of derDoc logos (numbered 1 – 4.jpg) (complete set in zip). Selection of Teelicht logos (numbered 1 – 5.jpg) (complete set in zip). Selection of DMC logos (numbered 1 – 21.jpg) (complete zip).


Hansa-Gymnasium Bergedorf

 

  • pre-2000/Highschool/Pascal
    My first “official” programming education took place during my last years of high school. This was mostly mathematical and logical foundations as well as basic structures and algorithms in Pascal. All that code was written at school – so no source either, sorry.
  • “Hansa2k” – “h2k”/2001/self/PHP+HTML logo
    Website that was intended to be a community platform for my high school year of 2000. Our school was the Hansa-Gymnasium in Hamburg-Bergedorf, hence the name Hansa2k. I even owned the domain hansa2k.de for that site for a while. It is a heavily modified phpBB BulletinBoard system which sports a portal-like frontpage and more modifications to allow for people to store their addresses and other stuff, it had special h2k profiles and more to support that. It also contained the data of our CD that was released after graduation. logo Sadly, it never quite took off and so died a slow death around 2005, when I finally unregistered the domain. Full PHP Source (w/out copyrighted material of the CD).

Technical University of Braunschweig

 

  • 2001/TUBS-Programmieren I/Java+Scheme “Programmieren I,” first programming class at the Technical University in Braunschweig (TU-BS), first semester. Various homeworks written in Java include trees, OO concepts, lists and more. Also includes some functional programming basics in scheme. Zip.
  • “Xxy”/2003/TUBS-SEP/JavaXxy
    The “SEP” – Softwareentwicklungspraktikum, Group
    that mouthful which translates to software engineering lab in English – was a requirement for graduation which takes you through the complete software engineering process, from requirements gathering, specification to implementation and documentation. Screenshot
    Our project was to write a GUI editor for the Latex graph library xy-pic. We had a team of 6 people: 3 programmers and 3 business-information majors who mostly wrote the documents. Complete java source is here. Documentation (in German), assignment description (German). Business majors did the final presentation – so I sadly don’t have it.
  • 2001-03/self/PHP+HTML DMC
    Various homepages for my own amusement and non-serious purposes while at TUBS. Including a page for our Counterstrike clan “Teelicht” – [Tee], Version1 (zip) and Version2 (zip); Tee
    another of our clans that was a tribute to Darryl Musashi – an elusive character from one particular TUBSX-Files episode who was the God of all FPS, and he’s even on Facebook – apparently not anymore as of 2011 ;) – that was aptly named the “Darryl Musashi clan” or [DMC] (zip) (I once made a flash intro for DMC based on an Episode I trailer using the music and some clips from it – which sadly got lost in digital neverland); yet another short-lived clan called [TUBS] (for the university) (zip), as well as a stupid page to make fun of one of our lecturers – the page was called trivial (zip) because he liked that word so much.
  • “DFrac”/2004/TUBS-PVS/JavaDFrac
    This and the following project were done for the “Praktikum Verteilte Systeme” (PVS) – distributed systems lab – at TUBS in S04. First part is a distributed fractal calculator using 3 different methods: Sockets, Java RMI and Corba. Source. Our SVN repo is still online, at my friend’s Code Trac. Website (zip).
  • “P2Pc”/2004/TUBS-PVS/C# P2Pc
    Second part of PVS. Distributed p2p chat system, using XML for messages. Every packet is signed and every entity has to have a X509 cert for that. Supports anonymous channels (onion routing), private (symmetric encryption) and a public channel as well direct messages with pub-key encryption.
    We were the only group writing it in C# which led to some incompatibilities with the other groups implementations which were all written in Java, specifically because of the order of fields in the XML messages. commandlineWe wrote a library that implements all messaging, encryption, signing, connection managing/routing and more, as well as a command-line version (that acts as a naked node in the network when no user is authenticated) and GUI that both use the library internally. Homepage has links to project description, XML schema and more; though pdfs are not linked anymore, apparent reason stated is because of recent tuition introduction. Full source. Note: The compiled binary in the bin/ folder is linked against exact version 1.0.0 of gtk# and thus does not work with the current available version 2.*. Newly compiled Debug binary (for version 2.* of gtk#) here.

New Mexico State University

 

  • 2004/NMSU-ArchI (CS473)/C
    Architectural concepts course at NMSU. Course homepage (offline, zip). ArchII final presentation Homework assignments included a MIPS assembly and pipeline simulator. I wrote it on an old stripped-down Dell laptop, which I did not backup – the professor thankfully still had the source ;) Graduate-level Arch II class final presentation.
  • 2004/NMSU-ST (CS479)/CSound NMSU
    Special topics – computer musics class. Interesting class about computer music generation. Assignments were to get some familiarity with CSound. Course homepage (offline, zip). All programming on my part was done at the graduate lab at NMSU, so no source.
  • 2004/NMSU-AI (CS575)/Java
    Kalah Final Project for AI class at NMSU in fall of 2004. Assignment was to write an agent that plays a game of (Man-) Kalah (aka. Calah) using alpha-beta search to calculate moves. I used a slightly more efficient variant called MTD-f. Agent plays by reading moves from stdin and outputting moves to stdout, simply the number of the pit to move from. Server
    I also wrote a game-server that plays two agents against each other, since the C-server did somehow not work with my Java version. Full source including game-server. Course HP offline, archive zip.
  • 2005/NMSU-AI ML (CS579)/Weka
    Graduate level Machine learning (offline, zip) class at NMSU. Final presentation Final presentation for that class was about Neural Networks in games called Neural Networks camping. Homework assignments were some easy introductory problems in Weka, a data mining software in Java. Sadly, I did not keep them.

University of Texas at El Paso

 

  • 2005/self-UTEP/PHP
    The dorms at UTEP had a DHCP server that required you to re-authenticate every so often to get access to the internet to prevent people from running unsupervised/illegal edonkey-downloads all day. UTEP logo They also had a bluesocket authentication system for their Wireless APs. I wrote some simple PHP scripts that took care of both of those and stuck them into my cron, or just in a firefox tab under windows. Also includes some other sites I did while at UTEP: small website for “Planetlabber,” our little device that presses the power button of a server remotely. Source.
  • 2005/UTEP-AA (CS5350)/Java Final presentation
     Advanced Algorithms class at UTEP. Assignment was to write a program for measuring running time of different implementations for Matrix multiplications. Source. HP and assignments not available any more. Final presentation (pdf). Project turnin (pdf) part1, part2, part3.
  • UTEP logo2006/UTEP-DBMS (CS5322)/SQL
    DB class at UTEP in spring06. Assignments done in SQL for Oracle. HP was/is a wiki that required login :(
  • 2006/UTEP-OS (CS5340)/C
    Operating systems class at UTEP. UTEP logo Assignments were to write a simple shell, consisting of tokenizer for input, scheduler and more. Code. HP (offline, zip).


Technical University of Braunschweig

 

  • 2007/TUBS/Java final presentation
    Bachelor Thesis. Survey to find the best scripting language suitable for running on a smart-phone platform developed at the IfN at TU-BS, called HSP. All were required to be written in Java, and be able to run on the mobile JVM running on the HSP. Source of some small test scripts for time measurements, presentation on slideshare, offline copy.
  • “DBV-DSV”/2007/TUBS/Matlab
    Digital image and signal processing labs. All done in Matlab, very short. Source will be released once I have cleaned up a bit and remembered which parts were given to us and which ones I did.
  • “IAM”/2007/self/PHP+JS
    ‘    Inline-ajax-more’. WP logoWordPress plugin that turns every “read more >>” link on the WP front page automatically into a JavaScript link that pulls the rest of the entry via Ajax from the server and fades it in and out. This does not require any user interaction like modifying any templates or the like like other plugins do. Homepage of plugin was a page in my old WordPress blog, which with lots of comments turned into a makeshift discussion forum. I do not have a backup of that blog, however archive.org still had a version in its cache, though text only. Latest version updated to work with WP 2.9.2 (v1.1 – released 31.3.2010), its homepage is now a page here on this blog.
  • “SMSlib”/2008/self/Objective-C+Java P5
    Library plugin for Processing (P5). It reads the data from the SuddenMotionSensor (SMS) on Apple’s laptops. There was already a lib for processing (using Unimotion) before I wrote mine, but somehow I got very strange readings with it. So I reimplemented it using the SMSlib from Suitable systems. My version returns an array of all 3 readings as a float in units of g, instead as plain ints like the other. P5 Forum thread. Source.
  • “Dock”/2008/self/Obj-C+Java dock
    Library for Processing that allows drawing into a surface that gets rendered into the application’s icon in the Dock. Works only in Mac OS X (not yet tested on 10.6). Uses some native Objective-C code as well as Java JNI for the bridge. P5 forum thread. Source.
  • “TrayIcon lib”/2008/self/Java Tray
    Another library plugin for Processing. This time it allows drawing into a drawing surface that represents an icon in the tray utilizing the new class Tray in java 1.6. Works on both OS X and Windows. Though under Mac OS X it only draws in B/W in adherence to the Apple GUI style guidelines. Forum entry in the processing forums. Source.
  • “SMS* sketches”/2008-09/self/ProcessingSketch
    Various sketches in Processing using the libraries I wrote. Most of them draw all readings from the SMS sensor and plot them in either 3d or 2d. The 3d version plots all 3 axis extruding from 0,0,0 like this. 2d Version draws all 3 axis on a 2d plot like here. See entry in my blog here. I also turned this sketch into a widget using processingjs. SMSDock. First SMS sketch that I wrote here.

Voodoo-Media

 

  • “Schneiderbanger”/2008/Voodoo-Media/PHP+HTMLVoodoo
    Website for a German law office that I helped build while working at Voodoo-Media in Hamburg in the summer of 2008. Source is obviously under NDA, but the online version we built is publicly available here.
  • “Hanseaten-select”/2008/Voodoo/PHP+HTML HS
    Online shop of a fine wine and delicatessen seller in Hamburg, Germany that I worked on while at Voodoo. Source under NDA, website at: http://www.hanseatenselect.de.
  • “Printcarrier”/2008/Voodoo/PHP+HTML
    printcarrier.de: Voodoo Large German online print-shop. I worked on the back-end for that company on an order-management system which makes heavy use of Ajax to be completely dynamic. Source under NDA and website not publicly available, for obvious reasons. Done under the project lead of Birger Hartung while at Voodoo.
  • “PC-TQM”/2009/Voodoo/PHP+HTML Voodoo PrintCarrier-Total Quality Management: System to classify incoming support emails into different departmental categories. Uses naive bayes for classification. Based on and adapted from both B8 and this simple PHP naive bayes implementation. Source under NDA and website not publicly available, for obvious reasons. Done under the project lead of Birger Hartung while working for Voodoo.
  • “P5Seismo”/2009/self/HTML+JS P5Seismo
    This is the Widget that draws readings from the SMS sensor on Apple’s laptops on a 2d plane mentioned earlier. Lets you customize how to draw the axis, what the update rate is, the size, colors and more. Entry in my own blog. It was first implemented in Processing and then moved to Processing.js and turned into a widget, which is basically just a webpage displayed in the dashboard using webkit as a renderer. I made 3 different versions with different frames. Version 1, 2, 3.
  • “Adium-SVZ”/2009/self/Obj-C Adium
    Plugin for Adium IM client for Mac OSX that enables integration of the website Ajax chat of the German Facebook clone StudiVZ. Since their API is not open I had to rely on a third-party protocol bridge from Nimbuzz, which is basically just a Jabber/XMPP gateway. So the plugin just extends Adium’s (pidgin’s) own XMPP code to account for the different usernames and let’s the user pull pic and status message from the website. SVZIt needs a Nimbuzz account with your SVZ account added to it and also the SVZ login to pull the data. Sadly, that does not work at the moment, since they have changed the site in the meantime to account for various recent breakins. Plugin website at Adium extras. Full source of latest version beta 5.2.
  • “ThunderSomething”/2009/self/Javascript+XUL TB
    Thunderbird plugin that does the same as the excellent Firesomething plugin does for Firefox: It mangles the browser’s name and allows changing the Window title and HTTP requestor string to a random name on every start. TSThundersomething does the same in Thunderbird, and also changes the X-Mailer (and optionally some more) headers when sending a mail, and has some post-processing code for the name (like 1337′ing). Mozilla extension page. Full source.
  • “lorenzmeyer-art”/2009/Monika LM/HTML Screenshot
    Website for my mother’s art. Simple HTML plus a JAlbum produced image album.
  • “fast-autoinsurancequote”/2009/Nick/PHP+JS Screenshot
    Website     done for a friend in San Diego. Collects and sends your info as a lead to insurance companies. Basic HTML plus some JS and PHP magic for passing values between pages and posting of actual data to the backend. Source under NDA.
  • “Game stats”/2009/Nick/PHP+JS
    Website for graphing some historical game data, primarily the NFL for now, using various parameters and plotting methods. Uses the excellent JQuery lib jqplot. Unfinished/unreleased.

University of California San Diego

 

  • 2010/UCSD-Compiler I (CSE131)/Java UCSD
    Compiler construction     (zip, offline) class at UCSD. I took this class through UCSD extension in Winter 2010. Project assignment was to write a simple compiler for a subset of the C language called reduced-c. We were given the lexer and grammar, so we “only” had to implement the parser as well the back-end of the compiler that generates assembly code for the Sun SPARCv8 architecture. Source.
  • “TBTracer”/2010/self/Javascript+XUL TB
    Thunderbird plugin that shows all of the mailer’s web traffic, including HTTP and all text mail protocols (SMTP, IMAP, POP3 and NNTP). TBTNeeds TB’s own NSAPI logging enabled which logs all over-the-wire traffic to a file. Mozilla extension page. Currently in beta stage.
  • 2010/UCSD-Graphics I (CSE167)/C++ UCSD
    Intro to Graphics (offline zip) class at UCSD. I took this class through UCSD extension in Winter semester 2010. Course consisted of 6 homework projects, my code for those can be found here screenshotand one final project which I did with two partners (code, textures, unpack in same directory). There is a list of all submitted final projects (offline zip).

Subliminal Society U.G.

 

  • “Baseballs-video-swing-contest”/2010/Warner/Flash+Actionscript bvsc
    Viral marketing website for the German 50′s band The Baseballs. Idea is to let the fans record their own video performance to the song Umbrella by the band, using flash and a webcam, as done by countless individuals on youtube before. Users can alternatively upload their own video. The band will then select the best entries which in turn win tickets to a secret concert of the band, for which there are no normal tickets available. Concept and idea by Warner Music and Felix Pace of subliminalsociety.org. Graphics by Mathias Rendl. Public website was (the competition has ended as of 4/2010) online at: baseballs-video-swing-contest.de / .com.
  • “Jennifer Rostock-video-contest”/2011/Warner/Flash+Actionscript
    Viral marketing website for a fan-casting to find some background singers for the refrain of her new song. Similar to the baseballs contest, used the same codebase. Let the fans record a video of themselves singing/acting during the refrain in a short version of the song. Additionally, it called for a karaoke-style overlay with a jumping red ball to give a clue as to what to sing.jros
    Concept and idea by Warner Music and Felix Pace of subliminalsociety.org. Graphics by Matthias Reinders. Public website was (the competition has ended as of 5/2011), still is accessible though, online at: jennifer-rostock.de.
  • “FujiNoSono.de”/2011/Warner/HTML+PHP
    Auction platform to raise money for an orphanage in the north of Japan that got damaged heavily during the 2011 Tsunami. fujinosono
    10 items sponsored by Warner, including instruments from the personal collections of Udo Lindenberg and Chris Rea, are auctioned off during the time of 10 weeks – one week per auction. Platform based on php probid.
    Concept and idea by Warner Music and Felix Pace of subliminalsociety. Graphics by Matthias Reinders. Public website was online from 8/1/11-9/9/11 at: fujinosono.de.
  • WaldiTeen racer sites/2011/cmv-sportmedia/HTML+PHP Killen
    Various websites for up-and-coming Kart teen-racer stars (I’d like to think the next Schumi is among them) done for cmv-sportmedia. MarkyDesign and contract through Matthias Reinders (Cobra5).
    Websites are custom modded wordpress sites to give them the ability to post news and pictures.
  • subsocMasked video overlay/2012/Subliminal Society/HTML+SVG
    Small proof-of-concept to see if one HTML5-video could be masked by another video. The video mask had to be movable with the mouse by the user. In flash something like that is possible. This was just a test to see if that was doable in pure HTML5 with the help of SVG. Final version that uses inline SVG works only in Firefox! Browser-detection switch to serve flash version to other browsers. Final source (zip). Online version.
  • “SolMexicano.com”/2012/SolMexicano/HTML+PHPSolMex SolMex
    New website for my wife’s mexican folklore dancing group Sol Mexicano in Hamburg. Running on a wordpress core with a custom template based on a design done by Matthias Reinders (Cobra5). Pictures are generously hosted by photobucket (all 1900 of them!), videos by Youtube.
  • Yumwe“Yumwe”/2012/Subliminal Society/rails+ruby New project that is still under construction called Yumwe. subsocIt’s a collaborative eating/cooking platform, more details when it goes into beta. As of July 2012 when we handed it of to its new developer, it got a major rewrite and is now in public beta.

seed & sugar AG

 

  • “seed & sugar website”/2012/s&s/PHP+HTML+p5js ss
    First release of the company website. WordPress installation which uses processing.js for some of the eye candy and generally lots of javascript. Also made a mobile version of the same site using wordpress mobile pack and jQuery mobile with a little less bang.
  • Planet-Prestige Magazin: “The Prestige”/2012/s&s/PHP mag
    Magazine blog site for the beauty products web-shop Planet-Prestige. Heavily customized wordpress installation running on two servers behind a varnish reverse proxy, using w3-total-cache for caching and statics minification as well as a CDN.mag
    Also made a website for the Planet Prestige physical store which is in its own WP install, sporting a modded WP Events Calendar.

Northworks Software GmbH,
part of Travian Games GmbH

 

  • “goalunited pro”/2013-2016/travian/PHP+MySQL+ActionScript ss

    Next release version of the then popular in-browser flash-based soccer manager goalunited. Backend in PHP with MySQL DBMS, frontend in ActionScript / Adobe Air to dual-run on mobile as well.
    Code developed under NDA.

ContentFleet GmbH,
later split off as Onzu GmbH

 

  • “storybeat”/2016-2019/onzu/node.js + mongoDB + Elasticsearch ss
    Work on the backend web-crawler and data sb processing pipeline for Onzu's content monitoring platform storybeat. Implementing API-crawler at first and then web-crawler to crawl content from all major social media platforms: facebook, instagram, twitter, tiktok, twitch, youtube, etc.

 


Onzu GmbH, aquired by
Jung von Matt as JvM/Flow

 

  • “onzu console”/2018-2019/onzu/HTML+JS + mongoDB + Elasticsearch ss
    Backend tool for managing and monitoring the sources across all platforms that are scanned by storybeat's crawlers.

 

  • “origin extension”/2019-2020/onzu/HTML+JS ss
    Chrome browser extension for checking and managing the crawled platform's sources directly on the web.

 

 

 

  • “Flow Vocal”/2019-2020/flow/vue.js jvm
    Flow's platform to discover and monitor influencer on instagram. Used onzu's backend crawlers for content. Frontend entirely written in vue.js. Sadly no screenshots available.

Content Fleet GmbH,
part of Ströer SE

 

  • “featured.de”/2021-present/vodafone/PHP (symfony) + MySQL + Elasticsearch screenshot
    Online magazine for the Vodafone mobile network provider. Frontend runs on the symfony framework, backend on a heavily customized Wordpress CMS for the editors.

 

  • “AMEXcited”/ 2021-present /American-Express /PHP (symfony) + MySQL + Elasticsearch screenshot
    Online lifestyle magazine for the American Express credit card company. Frontend runs on the symfony framework, backend on a heavily customized Wordpress CMS for the editors.
  • “umziehen.de”/2021-present/Deutsche Post/PHP (symfony) + MySQL + Elasticsearch screenshot
    Website as a landing page for the Umzugsmitteilung of the postal service Deutsche Post in Germany. It's a one-stop shop with tips and guides for all things moving related in Germany.
    Frontend runs on the symfony framework, backend on a heavily customized Wordpress CMS.
  • “Programmatic OOH”/2022-2023/Ströer/PHP (symfony) + MySQL screenshot
    Online Tool for Ströer's Programmatic OOH, which makes it easier for ströer's sales reps to plan and book advertising campaigns. Frontend runs on the symfony framework, backend just simple MySQL DBMS.

Stein Maritime Consulting

 

  • “theseus”/2021-present/Stein Maritim/Java screenshot
    Work - mostly translations - on the e-learning platform theseus for ISPS and ISM training. Also included upgrading to a new version and move to a new server. Theseus runs on the java e-learning software OpenOLAT which is a spin-off from the University of Zürich (ETHZ).

 

  • “Estrada Massagen”/2023-present/Estrada Massagen/LAMP screenshot
    Website for the massage parlor Estrada Massagen in Hamburg Ottensen.
    Simple Wordpress on LAMP stack with a customized theme.