The American (2010) on Netflix

In Dalarna, Sweden, the lonely hit man and craftsman Jack has a tragic encounter with two assassins hired to kill him and survives an ambush. Jack travels to Rome and calls his contact Pavel (Johan Leysen) that meets him in a cafeteria, gives a Fiat Tempra to him and asks Jack to travel to the countryside for a next assignment. Sooner a woman called Mathilde meets Jack and delivers the specification of a sophisticated weapon to be constructed by him. While living in the village and building the weapon, Jack befriends the local priest and has sex with the prostitute Clara. The distrustful Jack gets closer to Clara and sooner they date outside the brothel. When Jack tells Pavel that this work will be his last one and he will retired after delivering the weapon, Jack is betrayed and he does not know who can be trusted.