It depends on what you mean by pure tech. I take what you're saying as "intellectually interesting," where you can focus on tech more than business. Obviously,

It depends on what you mean by pure tech. I take what you're saying as "intellectually interesting," where you can focus on tech more than business. Obviously, any for profit company will have some proportion of business stuff in your job. I suggest looking at scientific companies - think medical devices, sensors, medical imaging, research, etc.