Timo Sirainen, born 1979, is a Finnish programmer also known under the handles

Nickname

A nickname is "a usually familiar or humorous but sometimes pointed or cruel name given to a person or place, as a supposedly appropriate replacement for or addition to the proper name.", or a name similar in origin and pronunciation from the original name....

 "cras" and "tss". Sirainen is the original author of the IRC-client Irssi

Irssi

Irssi is an IRC client program for Linux, Microsoft Windows, and Mac OS X. It was originally written by Timo Sirainen, and released under the terms of the GNU General Public License in January 1999.-Features:...

 and the POP/IMAP server Dovecot

Dovecot (software)

Dovecot is an open source IMAP and POP3 server for Linux/UNIX-like systems, written primarily with security in mind. Developed by Timo Sirainen, Dovecot was first released in July 2002...

. Sirainen lives in Tampere

Tampere

Tampere is a city in southern Finland. It is the most populous inland city in any of the Nordic countries. The city has a population of , growing to approximately 300,000 people in the conurbation and over 340,000 in the metropolitan area. Tampere is the third most-populous municipality in...

, Finland

Finland

Finland , officially the Republic of Finland, is a Nordic country situated in the Fennoscandian region of Northern Europe. It is bordered by Sweden in the west, Norway in the north and Russia in the east, while Estonia lies to its south across the Gulf of Finland.Around 5.4 million people reside...

.

In 2006, Sirainen began studying biotechnology

Biotechnology

Biotechnology is a field of applied biology that involves the use of living organisms and bioprocesses in engineering, technology, medicine and other fields requiring bioproducts. Biotechnology also utilizes these products for manufacturing purpose...

 at the University of Tampere

University of Tampere

The University of Tampere is a university in Tampere, Finland. It has 15,400 degree students and 2,100 employees. It was originally founded in 1925 in Helsinki as a Civic College , and from 1930 onwards it was known as a School of Social Sciences...

.

He was formerly working for Rackspace

Rackspace

Rackspace US, Inc. is an IT hosting company based in San Antonio, Texas. The company also has offices in Australia, the United Kingdom, The Netherlands and Hong Kong, and data centers operating in Texas, Illinois, Virginia, the United Kingdom, and Hong Kong in late 2008...

 Email & Apps (formerly Mailtrust), where he continued the development of the Dovecot

Dovecot (software)

Dovecot is an open source IMAP and POP3 server for Linux/UNIX-like systems, written primarily with security in mind. Developed by Timo Sirainen, Dovecot was first released in July 2002...

POP/IMAP server.

Since May 2011 he runs his own company where commercial support for dovecot can be found.