I have a severe stutter and I'm in my final year of mech engineering too. Luckily I have got 2 offers from my campus recruitment. Try and give as many interviews as possible. Maybe the first few will go really bad, but trust me it's fine. With more interview experience ull reduce ur fear and anxiety during interviews. I never attended sales or marketing interviews as the job requires lot of talking. But for the technical and core companies a stutter does not matter. Ur technical knowledge matters the most . And one thing which i did was i always made sure that i tell my interviewer that i stutter and i will be needing more time to convey my thoughts. Trust me they will understand and most of them will overlook your stutter. TXT me if you need further advice. All the best!!!