2010-03-01T19:26:26 Wolfgang Häfelinger wh@haefelinger.it WH

Looking for interesting and challenging work in the design and development of software projects within Europe.

Surname, First-name Häfelinger, Wolfgang Address Slangenburg 42, 1082JW Amsterdam, NL Nationality German Year of birth 1964 Education University degree in computer science Telephone +31 648 27 61 59 Email wh@haefelinger.it Internet http://www.haefelinger.it Weblog http://workbench.haefelinger.it images/L1010027.jpg images/L1010037.jpg images/L1010042.jpg images/L1010044.jpg

Themes Configuration management, Software development, Web applications, IT security, Compiler construction, Telecommunication. Work Independent work; Teamwork; International Experience; Flexible

2009 häfelinger IT 2005-2009 European Patentoffice 2001-2005 Borland 2000-2001 Dresdner Bank 2000 Karis AG 1999 IBM 1998 Robert Bosch GmbH 1994-2000 Computec GmbH Software

Freelance position as Software Architect and Developer within the Research and Architecture Team. Design and Development build-system “Darwin” as quality assurance measurement.This and other case-studies regarding my experiences as professional are available at my English company site, http://en.haefelinger.it/casestudies European Patent Office, The Hague, The Netherlands ; 2005-2009 A problem to tackle when building component based software applications is the use of “proper” component versions. Using an outdated component is detected late in the deployment cycle and thus costly. The goal of my assignment design and provide a solution for this problem. I solved this task by providing a fully automated build-system based on a Continuous Integration approach. Due to the extraordinary success my build-system, it got internally branded as “Darwin” and became the de facto standard for building software within the EPO. A fundamental aspect of “Darwin” is that developers do no longer care about dependency versions. They just specify the dependencies their component depends on. Thus, all component version management was entirely taken over by “Darwin” in a fully automated way. CruiseControlhttp://cruisecontrol.sourceforge.net/ had to be extended in order to archive the overall goal. A larger part of the rather complex version management got written in Python. Furthermore, a framework sitting on top of Ant had to be written to reduce build scripts to essentially dependency listings while assuring a homogeneous build process of several hundred projects.

Java, CruiseControl, Ant, CVS, Maven, Tomcat, XML, XPATH, XLST, Linux, Windows, Eclipse, REST, Python, JSP

pyANTLR - non-commercial contribution to Open Source and Free Software.This contribution to an Open-Source project as well as other projects and contributions created by me are available on my workbench at http://workbench.haefelinger.it Amsterdam, The Netherlands; 2004-2005 ANTLRPlease find further details on ANTLR at http://www.antlr.org is a framework for writing language recognizers, translators and compilers with an excellent support for syntax tree construction, manipulation and tree walking. ANTLR is written in Java while having a plug-in system allowing to write and plug-in code generators for other target languages than Java. Before I joined the project, ANTLR supported Java, C++ and C as target languages. I extended this language set by writing pyANTLR, a code generator in and for Python. Thus it become possible to implement a Compiler entirely in Python. pyANTLR is an integral part of ANTLR since version 2.7.5.

Java, Python, Make, autoconf

Post-sales support middle-ware products (CORBA, J2EE), International team, International clients. Full-time employment as Software-Analyst, Borland, Amstelveen, The Netherlands, 2001-2004. Responsible for post-sales support of mostly large, well known customers including Nokia, Ericsson, France Telecom, Deutsche Bank London, Euronext Amsterdam or Bundesagentur für Arbeit (Nuremberg, Germany). Main task to analyze, test and debug customer configurations related Visibroker and Borland's J2EE Application Server. Working either customer or Borland premises. Other tasks were to maintain a highest level of knowledge about the interaction of Borland products; to maintain contact with specialists at other sites – especially with R & D in Singapore and California; to create and distribute information about specific products; to give training and o support pre/after sales activities.

Solved a mysterious problem occurring at Bundesagentur für Arbeit related to Visibroker in in a heavy multithreaded environment. That Visibroker deployment was the largest ever taken with approximately 90.000 connected clients. The problem could be explained with the help of specialized performance testing tools like silkperformer. Eventually I solved the problem by exchanging a Solaris specific thread library. Lead architect in designing and providing a solution that allowed engineers to use Visibroker without installing them, regardless of platform (Windows, Solaris, Linux, HP-UX, AIX) or machine. This solution got later implemented in other support centers as well.

AIX, Ant, Apache, Borland Enterprise Server, C++ Builder, CORBA, CORBA NamingService, CORBA Notification Service, CORBA POA, DB2, Dbx, EJB, Ethereal, GIOP, GNU/Linux, Gatekeeper, Gdb, HP-UX, HTTP, IIOP, JNDI, JNI, IIS, HTML, IPC, Informix, J2EE, JAAS, JCE, JDBC, JDK 1.3, JDK 1.4, JMS, JSP, Jakarta Struts, Jbuilder, LDAP, Make, Montavista Linux, OpenLDAP, OpenSSL, Oracle, Osagent, RMI, Mod_iiop, NAT, SPY6, SSL, Servlet, Shell scripting, Silkperformer, Solaris, Squid, TCP/IP, Tcpdump, Telnet, Tomcat, UDP, UNIX, Visibroker for C++, Visibroker for Java, Windows, X.509, XML, Xdoclet

Full-time employment as C/C++ Developer and Project-manager ; Head of Computec's research project ACCENT; international project experience; design and development ASN.1 compiler and framework (C/C++, Java); Product development ASN2CXX and ASN2Java - commercial outcome of ACCENT. Computec GmbH Software, Karlsruhe, Germany; 1994-2000. ACCENT was a collaborative research work of several European companies and organizations. It was partially founded and supported by the European Community as part of their ESPRIT program (EP 9169http://research.cs.ncl.ac.uk/cabernet/www.laas.research.ec.org/esp-syn/text/9169.html). The objective of ACCENT was to devise a coding system acting as hardware cell. This hardware cell had the ability to encode and decode X.209 binary data, the canonical binary representation of ASN.1 at that time. I represented Computec GmbH Software in this consortium during the complete lifetime of ACCENT. Besides participating in the design of the overall concept of ACCENT, I provided an ASN.1 compiler and a software coding system for ASN.1 data structures. This provision allowed us to measure the performance improvement gained by using hardware instead of a pure software solution. My software encoding engine was extremely fast and questioned the idea of implementing a (rather complex) hardware cell. The collected experiences led to the commercial development of the ASN2XXX product family at Computec. The whole product family got designed by me and implemented in a small team led by me. The ASN2XXX product family has been sold world wide, mainly within the telecommunication area. Well known customers have been Ericsson, Bell Atlantic, Marconi, Telefonica Spain, Storck Netherlands and Bosch Telecom Germany.

ASN.1, C++, Java, Windows, Solaris, Sniff

Language AWK, Shell-scripting (Bash, Bourne), C#, C/C++, Lisp, Guile, Java, JavaScript, M4, PHP, Pascal, Perl, Prolog, Python, Ruby, Scheme, Tcl/TK Markup XML, HTML, ASN.1, TeX/LaTeX, AsciiDoc, DocBook Mini-language SQL, Regular Expressions, XPath, CSS Operating-system Cygwin, Unix (Digital, HP-UX, AIX, SGI, SunOS, Solaris), MKS, Windows (98, 2ooo, NT, XP), MS-DOS, MSYS, MacOS/X, Novell Netware, GNU/Linux (RedHat, Suse, Ubuntu, Mandrake, Montavista) Security Kerberos, PKI, SSL/TLS Database IBM DB2, Informix, JDBC, MS Access, MySQL, ODBC, ObjectStore, Oracle Communication ASN.1 (BER, CER, DER, PER, X.68x, X.69x.) CIFS, CORBA, CUPS, DNS, GIOP, HTTP, HTTPS, ICMP, IIOP, IMAP, JAAC, JCA, JNDI, LDAP, NAT, NFS, NIS, NTP, OSI, PEM, POP3, RMI, RPC, S/MIME, SMTP, TCP/IP, UDP, X.509, GDMO, XDR Web-development CGI, J2EE, REST, Ajax, jQuery J2EE Servlets, JSP, EJB, RMI, JINI, JNDI, JMS, Web-services Methods Extreme Programming, OOP

IDEs Eclipse, Visual Studio, JBuilder, Sniff, Sun Workshop, Symantec, Visual Age Editors Emacs, vi Versionsmanagement CVS, Subversion, git, mercurial, RCS, Perforce, GNU arch Compilerconstruction Antlr, lex/yacc, flex/bison, JavaCC Webserver Apache, Tomcat, lighttpd, winstone Appl. Server Borland Application Server Build-tools Make,Ant, Maven, autoconf Build-server CruiseControl, Hudson, Anthill License-systems FlexLM CORBA Visibroker, mod_iiop, Mico, OmniORB, Orbix, TAO ASN.1 ASN2CXX, ISODE, snacc, OSS Debugging purify, gdb, dbx, nm, wireshark Performance silkperformer Test expect, junit Security OpenSSL, mod_ssl Connectivity Samba, NFS, automounter, Humingbird Exceed, ssh UML Paradigm Plus Graphics Photoshop, GIMP, Inkscape, SVG, graphviz Email Qmail, Sendmail Installbuilder InstallAnywhere, InstallShield, MSI-Installer Integration Swig CMS Wordpress, Mediawiki

1987-1994 University of Karlsruhe; Graduate in Computer Science 1984-1987 Grammar School (Technisches Gymnasium) Müllheim; Allgemeine Hochschulreife 1981-1984 Bahnbetriebswerk Haltingen; Education as Metalworker 1976-1981 Secondary School (Realschule) Kandern; Mittlere Reife

English fluent Dutch intermediate