Permissible and Impermissible employment

Car allowance

Q: I am working in a company as an engineer and as per my designation car is allowed for my traveling but my company does not have a car infact they pay me money to hire a rent car for my visit. My question is that if I don't use a rent car and claim rent car bill, will it be halaal or haram. For example, I have to travel from city A to B. I travel it through train which is cheaper but to the company I claim rent for car because as per my designation car is allowed to me for my ease. But I want to save some money so I rather use some cheap transport method and claim rent for car. Kindly also note the this is the environment of my company. All my colleagues do this and if I don't do this, they will whisper against me to the higher management and I have a chance to lose job. Even if I travel by train or some other transport and want to tell this to my company then my colleagues will become angry with me and will speak against me. So kindly answer me keeping in mind my both scenarios. One is that as per my designation, car is allowed to me for my ease and second, the environment of my office.

Developing software for a bank

Q: I am a software developer. My company gave me a task that I have to make an application where I will check that a person is eligible for bank loan or not. In the whole developing process, there is no any entry of interest. My task is only to check that is person eligible for the loan or not? As we know, bank loan process is interest based that is why I am asking this question. But the application that I will make only tells if that person is eligible or not.

Working for a company that maintains haraam websites

Q: I work in an IT company where they monitor and maintain the server of a website. That is we take care of all their backend and frontend problems and manage them according to the client requirements. Now the company has many websites which is haram like games of rummy played for real money and haram entertainment websites. The company also has good educational website. Is it permissible for me to work in this company and is it my earning halaal where I have to monitor and manage all these websites and make the website run smoothly irrespective of being halaal and haraam?