Hello Raul,

Thank you for getting in touch with us!

Unfortunately, I couldn't recommend you a company or a freelancer who create sliders but you should try to browse on these pages:
https://www.fiverr.com/
https://www.freelancer.com/

I am also work as a freelancer outside the company. If you would like to hire me for build a slider, then please write an email to my email address about your idea: [email protected]