If you want to do an internship in Singapore, then you will need a visa. How do you obtain this visa?
An internship in Singapore requires a visa. The visa can be requested at the embassy of Singapore and will cost between 50 and 100 euros.
This does require you to have an invitation from the company or a document that mentions an agreement between your own university or business / technical school and a university in Singapore. Abroad Internships will help you with this.
There are a lot of large European, Australian and American companies that offer internships at their affiliates in Singapore or a partner company.