There are many developers out there, and plenty of composers. The challenge is, like finding a date, to discover that spark. You can help the process by thinking about the kind of game your music will work for and targeting companies that produce this genre of video.
That involves lots of research. Contact the company or developer directly, by name, and say exactly how your music will enhance products they create. Keep communication short, and if you send a sample, make sure that it will download really quickly and easily.
A second option is, as suggested above, to licence your product through a third party supplier, for example a website such as indiegamemusic.com – there are a number of choices. That way, the developer might find you. Upwork is another site that links freelance composers with the clients they seek.
Another route, particularly when you are starting out, or if your motivation is just to get your music out there, is to submit to a library. It will probably mean giving up control of your composition however.