Yes, 1099 MISC income for certain types of side jobs gets reported on Schedule C of your tax return just like it would if you owned your own business. So even though you don't think of yourself as self-employed, it is a situation in which you worked for yourself instead of working for an employer that pays a salary or a wage. Therefore, the IRS treats this type of income as self-employment income.
Here is some more information regarding self-employed income:
https://ttlc.intuit.com/replies/4770969
