I was born 1969, got a degree in computer science (University of Fribourg, second branch general psychology) some time after and am working as a freelancer/contractor. I have spent my life in different parts of Switzerland and on travels on this globe. I'm living with my family in the north of Switzerland.

After studies I worked as a freelancer on several software development projects. 1995 I co-founded and built up the internetprovider SPIN, where I was responsible for the technical aspects and was leading a small tech team.

At the end of 1998 I quit SPIN and was travelling around during 1999.

Mid-2000 Pirmin Kalberer and I founded sourcepole, a company that does Linux and Open Source engineering and services. In teams, independently or together with third parties we'be been doing projects sized from a person-month to multi-year with dozens of participants ever since.

Since 2002 I am giving lectures on systems programming, high availability, data communications, firewalls, ruby and ruby on rails at the computer science departement of the Hochschule für Technik, Wirtschaft und Verwaltung Zürich and am lookig after student's assignements.

Currently I'm available for projects.

• The following technologies, languages and systems habe been employed in recent projects:
  JavaScript, Ruby, Ruby on Rails, Shell, SQL
  CSS, DOM, XML
  CVS, Firefox, Firebug, Git, Internet Explorer, Mongrel, Postgres, Subversion
  Debian-, Redhat-, Solaris- and AIX packet management and system administration, Linux, Ubuntu

• I have at least one year of experience with these technologies:
  Ada, C, C++, Excel VBA, HTML, Java, Modula-2, Pascal, Perl, SQL
  Jira, KDE, Multithreading mit Pthreads, Qt
  HTTP/Apache, DNS/bind, GForge, IMAP, MySQL, SMTP/exim/sendmail
  RedHat, SuSE, Win3.11 (mit GUI), Win95 (mit GUI), Windows XP Embedded

• I know these technologies, but haven't employed them in while:
  
  AppleScript, Fortran, Lisp, PHP, Prolog, Python, Scheme
  SOAP, XSD, XSL, WSDL, LDAP
  CruiseControl, Mapserver, OpenLDAP, Samba, Together, X11
  680x0 Assembler, Atari ST, Macintosh, Win2000, Win97, WinNT

From 1995 to 1999 I was doing the technical (and less also the organisational) part of runing SPIN - a regional ISP. Through this work I have gained experience in the following areas:

• Administration of heterogenous Networks on IP basis (Unix, Mac, Windows), routing, LAN-WAN-dial-in, securing of the network through cryptographical techniques, firewalls.
• Administration of Unix systems namely Linux.
• Installation and maintenace of Internetservices such as WWW, FTP, DNS, SSH, SMTP(mail), POP, IMAP, dial-in.
• Networking over dial-up or leased lines: analog (dial-up modems, leased line modems), digital (ISDN, PRI).
• Integration of services and systems through scripting (Perl, Shell) and designing a WWW user interface for the whole system.

One of my tasks at T-Systems during the year 2009 was to verify and correct the network architecture and effective connectivity of a very critical core realtime system. These are the projects that were completed during my professional career (in chronological order):

Porting of a Module for statistical data analysis from Fortran to C and development of data analysis module in Excel VBA Technologies: Win3.11, Fortran, C, VBA Duration: 4 months

Further development and support of a software for company-wide control and accounting of work times Technologies: Win3.11, Win95, Borland-C++, Watcom-SQL, OWL (GUI), UML with Rational Rose Duration: 6 months

Module for exchange of data between different databases of the above software for company-wide control and accounting of work times Technologies: Win95, Borland-C++, Watcom-SQL, OWL (GUI) Duration: 2 months

Retrieval, analysis and implementation of an algorithm for version-control and management of software ("delta-algorithm") Technologies: C Duration: 3 months

Building and runing a internet services provider Technologies: Linux, limited support for Windows, Mac, Perl, C, Shell Duration: 3 years

Individial course about networking/linux Technologies: Linux, Perl, configuration of various servers Duration: 1 day

Course/consulting about firewall/linux Technologies: Linux Duration: 1 day

Implementation of the Sourcepole Website on top of Cocoon Technologies: Linux, Cocoon, CSS, HTML, XML, XSL Duration: 2 weeks

GIS (geographic information systems) consulting Technologies: Solaris, ArcIMS Duration: 2 weeks

Elaboration of a concept for a DB-based webaplication with XML structured data import/export Technologies: Linux, Java, PHP, XML Duration: 1 week

GUI and DB development Technologies: Linux, Windows, Java, AWT Duration: 2 1/2 weeks

Installation of an embedded Linux system prototype Technologies: Linux (Elinos), Shell Duration: 1 week

Setup and support of a webhosting service Technologies: Linux (Debian), Perl, Shell Duration: 3 years

Perl consulting/support/application development Technologies: Linux, Perl Duration: 1 week

Implementation, deployment and support of a SOHO server Technologies: Linux (Debian), Perl, Shell, various network services Duration: 3 years

GUI for GIS/DB application Technologies: Linux, Java, Swing, XML Duration: 1 month

Development and support of a video server Technologies: Linux (Debian), RealServer, Perl, Shell Duration: 3 years

Project management for the development of a backup system web-frontend Technologies: Linux, AFBackup, Perl Duration: 2 years

Managed services for various small companies Technologies: AFBackup, Apache, Debian, Firewalls auf IPTables Basis, Linux, PHP, Samba Duration: 5 years

Projekt management and co-development of a Linux distribution based on CRUX Technologies: Knoppix, Linux, Perl, Shell Duration: 2 years

Technology consulting for the Swiss Federal Archives with respect to implementation of archival solutions based on XML and XSD Technologies: XML, XSD, Java Duration: 8 months

Development on a GIS web application Technologies: Mapserver, Ruby on Rails, Firebug Duration: 3 weeks

Concept, implementation an maintenace of a high available, failover platform for a ruby on rails web application Technologies: Ruby on Rails, HA-Server, heartbeat, SSL Certificate Management, DRBD, Linux Duration: one month, maintenance ongoing

Concept and implementation of the SW life cicle for ticket selling automats for SBB / Swiss Rails. System tuning and inter-system communication Technologies: Ruby, XML, SOAP, WSDL, Java, CVS, Debian Package Management, Linux, grub, X11 Duration: 3 years

Embedded appliance: minimize Debian with X11 and Qt to under 100M, Adapt a touchscreen driver to new HW, config of an comprehensive graphical boot Technologies: Debian, Qemu, VirtualBox, Qt, Xorg, C Duration: 3 weeks

Concept and implementation of a high available system for the authentication and management of users of web applications. Technologien: Debian, OpenLDAP, syncrepl, LAM, Apache Dauer: 2 Wochen

Mandate for T-Systems: - Display of installations-stati of servers - Check and correction of the architecture of the lower levels of the realtime disposition-systems RCS of the swiss rails SBB - Scripting of the deployment-prozess and of the software distribution Technologies: Redhat, AIX, Solaris, ksh, bash, cvs, ssh, Network-Configuration, Zabbix, Tibco multicast Management: Coordination of participants, in order to bring the projects forward Duration: 1 year

Co-development for Panter of Denteo(not released yet) Technologies: JavaScript, dhtmlxScheduler, Firefox, CSS, Ruby on Rails Duration: 1 month at 200%

Colaboration on Open Source projects:

Main developer of the mailsync tool Technologies: C, C++, C-Client, IMAP, Unix Duration: 2 years, now in maintenance mode

Debian maintainer of the following software packages: mailsync, posixlock, screenie, udpcast Technologies: C, Debian packet management, Linux, make, shell Duration: ongoing since 2000

Debian ex-maintainer of: xxdiff Technologies: C, Debian packet management, Linux, make, shell Duration: approx. 5 years

Maintainer and co-developer of karm Technologies: C++, KDE, Linux, Qt Duration: 1.5 years

These projects were completed during university studies.

Implementation of a search algorithm and graphical testtools. Mac style GUI design Technologies: Macintosh, Modula-2 Duration: 1 month

Development of a compiler for an OO language. Technologies: SunOS, Ada Duration: 1 month in a team of

Design and implementation of a neuronal network. Technologies: SunOS, C, C++ Duration: 1.5 months

Porting of a compiler from Borland-Pascal/MS-DOS to C/UNIX, documentation of existing techniques for creation of machine independent programms, such as virtual machines, interpreted languages, on-the-fly generation of code etc. Technologies: MS-DOS, SunOS, Pascal, C Duration: 3 months

• HSZ-T
  
  • main study, core subject, one semester lecture on computer networks (ip, routing, BGP) (together with Michael Steuert)
  • main study, core, one semester lecture one on system software (pthreads, multithreading, garbage collection, memory management, file systems)
  • seminar on Ruby
  • seminar on Ruby on Rails
  • seminar on Linux Firewalls
• Digicomp
  
  • Occassional 3-day Perl course in french
• Swisscom
  
  • SNMP protocol and tools consulting
• Softcom Technologies
  
  • 2 months course Linux systems administration
  • 2 one-off seminars Linux and Ruby
  • a one day course Linux, Ruby and Ruby on Rails

I can communicate in spoken and written German, English, French, Italian and Czech, however my Czech orthography is sub-standard.