The role is called Design Technologist. Amazon has a good amount of them and they are starting to crop up in many more orgs. There is a real need for UX researc

The role is called Design Technologist. Amazon has a good amount of them and they are starting to crop up in many more orgs. There is a real need for UX research and prototyping supplemented by prototypes actually built in code rather than just mocked up. There are ignorant people who will see your mixed skill set as “jack of all trades, master of none” but they are incorrect. There is demand for this exact skill set and it is increasing everyday. UX engineer was mentioned here and that is typically a valid term for the role you describe too, this is what they are called at Google.