独立起業

solopreneur　　/,səƱləƱprə'nɜːr/　　　n)個人事業主

I'm a solopreneur.

entrepreneur   /,ɑːntrəprə'nɜːr/　noun   起業家･事業主

★ a person who makes money by starting or running businesses, especially when this involves taking financial risks

This has to do with a company that's generally run by just one person.