Does seeing scandalous and nude images while working in social media networking diminish the reward for fasting in Ramadan, and is this work unlawful (haram)?

Working in this permissible job does not appear to be forbidden, provided one lowers their gaze as much as possible and does not prolong looking at images after the need for doing so has passed. The forbidden gaze is what diminishes the reward of fasting, whereas a gaze permitted by necessity does not diminish it.