Namaskaram, I don't know of many part time engineering positions, but the trend is growing, e.g. [1]. However I'm confident that you could find a position that would pay you that salary for a more common 35-40 (and balanced compared to 48 hours, 6 days per week). Are you on LinkedIn? It can be helpful in my experience. Feel free to email me, maybe I can find someone to help (no guarantee though)
[1] 4dayweek.io