Already made online Gambling games

I already have the base to my website, with a database, created, all i am missing is the games to be created in my site.

I did start to create my own games, but to save time, im looking for an experienced developer to work with on this task.

Im looking for an already made system for a few games, including coin flip, crash game and also roulette.

These should all have profit-loss systems to prevent me losing too much money per round etc.

In the long term, i am looking to keep my site open and profitable, but also fair.

Thanks for looking, and i hope to speak with you soon