Test engineer wants to become a dev or R&D, what should I do?

Hi all,
I graduated with a bachelor’s degree in EE and worked as a field/lab test engineer for about two years. I really like programming and analyzing UE’s logs; however, my position does not require those things.

My goal is to join RnD or dev team in telecom, or modem to be specific, so what should I do? I was thinking about going back to school to get a master’s degree. Will that help?

Thank you for your advice!