Kingdom offices:
Cardinal
magistrate

City Offices:
Mayor
Bishop
judge

Might I suggest reading some history books?

"tax collector", as an example, was not really a medieval office.

Firstly very few people had noticeable monetary incomes. So there was no universal income tax. Much of the taxation arrived as duties levied on various things -- England, for example, taxed wool exports. These were usually imposed on things that were easy to find -- wool export needs a port, it's fairly easy therefore to see it happening.

Collection of the monies was delegated down through various structures to people such as bailiffs (typically non-landholding tax collectors), sheriffs (landowners who also collected taxes, and also ran local courts) and coroners (in addition to their duties investigating deaths). There was also a scheme of purchasing the rights to collect taxes. For a pre-determined price one would buy from one's Lord the right to tax others; any excess monies collected over the purchase price were your reward. Similarly some grants of land included the right/obligation to collect tax from subholders.

Very rich landowners were expected to pay an amount of money determined by the worth of their holdings. So a landholder with land worth 5000 pounds a year might be required to pay a tenth of that. Terms were somewhat flexible, and the payment might be in money or goods or personal military service or by supplying soldiers or by various other means. These taxes were granted by parliament on a case by case basis -- some years a fifteenth would suffice. In wartime a tenth. One year the King proposed an eighth and nearly provoked a revolution..

In other areas, the church might be responsible for gathering taxation at a local level (the ecclesiastical tenth) and funnelling the money to deliver both to the church structures themselves and also to the King's wardrobe.



So, "tax collector" isn't a medieval job. "steward" (working for a lord running his estates and also collecting taxes), "sheriff" or "coroner" would all be jobs which may include collecting taxes. "bailiff" isn't an office, it's a sort of collective title -- "mayors" are also sometimes included in the term but at various through medieval England it also referred to those who administered a hundred.

These sorts of things are complicated and if you want to be realistic, you shouldn't be just making them up based on a sort of SCA view of what was actually quite a long period of history.

"That's British system"

That's because I'm a British historian...