My Knowledge

Techniques & Technologies

  • Agile Software development: XP, Scrum, TDD, BDD, CI
  • Web development: HTML, CSS, Ajax, Flash, Json, XML
  • Security: General security concepts, Encryption, Specific attack vectors (SQL injections, XSS, CSRF, Session attacks)
  • High-performance systems: Caching, Parallel computing, Event based programming, Interprocess communication
  • High availability (ha) systems & load balacing: General concepts, Failover, Replication
  • Data communications: Client-Server concepts, Routing (BGP4), Network protocols (Ipv4/6, TCP, UDP)
  • Centralized server & cluster administration with customized netboot setups

Programming languages

  • Application development: C/ C++, Java, Pascal, Basic
  • Web development: Ruby/ Ruby on Rails, Javascript, PHP (OOP), Actionscript
  • Database access: SQL (advanced)
  • Shell programming: Perl, Bash
  • Optimized/ embedded programming: 0x86 Assembler

Software I use

  • Project managment: Basecamp, Pivotal Tracker, Highrise, GitHub
  • Operating systems: Linux (Debian, Ubuntu, Suse), Android, Windows 3.1+, MS-DOS
  • Web Frameworks: Ruby on Rails, jQuery, jQuery-UI, jQuery Mobile
  • Testing tools: RSpec, Cucumber, Selenium, Hudson/ Jenkins
  • Hosting: Web-Server, PowerDNS, BIND, Exim, Dovecot, DHCP3, Amazon S3
  • Databases: MySQL (incl. InnoDB), PostgreSQL, SQLight, CouchDB, Memcached, Redis
  • Security: IpTables, OpenVPN, OpenSSH, OpenSSL
  • High availability & load balacing: HaProxy, Varnish Cache, S3, Heroku
  • Virtualization: LXC, Linux V-Server, OpenVZ, VirtualBox, XEN
  • Image processing: Photoshop, Illustrator, GIMP, Adobe Flash
  • Development tools: Jedit/ Textmate, Netbeans, Eclipse, Visualstudio, git, Valgrind
  • Adminstration & deployment: Chef, Puppet, Capistrano, RVM

Gems I like

  • Core system: rails (3+), jquery-rails
  • Database: activerecord, sequel, pg, mysql2, squeel
  • Authorization & authentication: cancan, omniauth
  • Views: haml, sass-rails, formtastic, attrtasic, dynamic_form, kaminari, remotipart, navigasmic
  • Testing: rspec-rails, cucumber-rails, factory_girl_rails, timecop, database_cleaner
  • Deployment & server: capistrano, unicorn, thin
  • Miscellaneous: dalli, carrierwave, nokogiri, exception_notification, rjb


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+49 15156137223
+41 325134024