Luxoft has very low qualified recruiters. They don't see a difference between Java and Javascript. They easily can ignore your questions. They know nothing about the project. The only thing they can do it is to send you link to a job description. They are not able to do something beyond this action. You can reject position from one recruiter, but other recruiters will send you same position link. Interview it pretty easy. And all positions have same questions. Basic C# questions.