Hii Ayush,

There are a lot of options after B Tech(Bio technology).you can get a job in chemical and Textile Industries,agricultural sectors,pharmaceutical firms and manufacturing industries.

you can get a job as lab technician,clinic resercher,pharmacist,Medical writing Executive,Production manager on the basis of your B-Tech degree.

 the companies where you can get a job are-

• Cipla
• ranbaxy Laboratries
• Aurobindo Pharma
• Glenmark Pharmeceuticals
• Abbott India.

the approximate salary can be-

                                        Minimum salary          Meddium salary            Maximum Salary

• Lab Technician-               1.5                          3.5                                 5.6
• Clinic resercher-              2.3                          7                                    13
• Pharmacist-                    1.8                          4.5                                 7.4 
• Medical writter Executive-2.2                          5                                    7.6
• Production Management- 3                             6.5                                 8.5
• Medical represent Actives-2.1                         3.9                                 5.5

scope for Bio-Technology Engineeres are more outside India. 

hope you understand

thank you.