Is the wage of a female employee at a Taysir company unlawful (usury), bearing in mind that she has no family responsibilities except her ailing mother, and she possesses a skill that does not meet her needs?

Gambling is one of the major forbidden sins. Therefore, it is not permissible to work in a place that is based on gambling, because that exposes one to the wrath of Allah and is considered cooperation in sin. The questioner must leave this job and search for a permissible one, for "whoever fears Allah - He will make for him a way out."