This article is from the Bulgaria FAQ, by Dragomir R. Radev firstname.lastname@example.org with numerous contributions by others.
(by Holger Zscheyge), last updated: 31-Jul-1994
Try to contact the European Bank for Reconstruction and Development.
They are probably the best address for jobs with a focus on
FSU/Eastern Europe. Even if they cannot offer you a job they know
thousands of companies in the respective countries.
The EBRD can be reached by mail:
European Bank for Reconstruction and Development
One Exchange Square
London EC2A 2EH
As far as I know the US have an liason officer there. Hope this helps.