1- Generally, one should avoid working for a conventional bank as the primary source of income and business of a conventional bank is interest/usury. However, if someone is working for a bank in position that does not involve any direct involvement in interest based financial transactions then the income from such job may be considered Halal (lawful).
2- All the Ahadith in Muwatta of Imam Malik are highly authentic. Imam Malik's collection of Hadith enjoyed the same status as of Sahih Bukhari until Sahih Bukhari was compiled by Imam Bukhari. Since Imam Al-Bukhari's collection "Sahih Bukhari" included a greater number of Ahadith. This it took on the title of most authentic book after the book Allah "Qur'an".
3- According to some scholars, face of a woman is not required to be covered in front of non-Mahram males. However, it does not mean that non-Mahram are allowed to freely gaze at women. Gazing at stranger women remains prohibited.
4- It is permissible for a woman to wear clothes in front of Mahram relative that expose her hands, face and feet. She is not allowed to wear clothes that expose her shoulders. Likewise, she is not allowed to wear clothes that expose her chest. It is permissible to to not have an extra layer of cloth over her chest when she is in presence of her Mahram relatives.
A woman is not allowed to wear such clothes even in presence of her Mahram male relatives that reveal her breast in anyway.
And Allah knows best.
Mufti Ikram ul Haq
Fatwa Center of America