posted on 09.12.10 Assange was a NetBSD and PostgresSQL developer

He was a NetBSD developer:

http://ftp.netbsd.org/pub/NetBSD/misc/repositories/git/authormap

http://mail-index.netbsd.org/source-changes/1999/04/07/0051.html

He was also a PostgresSQL developer:

http://www.postgresql.org/community/contributors/

He wrote a port scanner…

http://hpux.connect.org.uk/hppd/hpux/Networking/Admin/strobe-1.06/

… and other free software. In short, he is a programmer by training

http://en.wikipedia.org/wiki/Julian_Assange#Computer_programming_and_university_studies