Do I need a real estate license? (California)

[Tim Pham]

I work part time (freelance) for a couple that owns 7 properties. Typical work week is around 10-15 hours. I fill in different hats for hem. From helping them in their office, errands, computer work and property management. With property management, I help them with repair maintenance. I reach out to plumbers, handyman and electricians to do the repair, get their invoices and forward it to the homeowners for payment. I also help out with rental apps, signing and renewal of leases. And they advertise me as their property manager to the tenants and prospective tenants even though I'm really technically their part time assistant. Do I need a real estate license? I don't want to do something unlawful. Thank you.