بسم الله الرحمن الرحيم
(Fatwa: 189/133/SD=2/1439)
If you have not made Chennai your native place and you go there only for your job then in case you stay there less than fifteen days you shall be musafir. Thus it shall be wajib on you to offer qasr salah in case you miss jama’at. If Vaniambadi is your native place and your parents stay there then it shall be deemed your native place. Thus as soon as you reach Vaniambadi you shall become muqim and it shall be wajib on you to offer full salah.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband