First I've been asked to change the owner of the current files in the folder and i chown'ed -R the path but i want to be sure that files which will be created there in the future will also be owned by the same user.
Assuming you only want to the be able to share files seamlessly between a group of users, on Linux you can set the 'set group id' bit on the directory:
chmod 2777 /shared
chmod g+s /shared
To make the files actually be owned by your user you would have to do some scripting. For example, running this find command suggested on wikipedia via a cron entry every minute.