Lokesh, Software developer is a job designation. Various companies have various designations for the same role. So to start off, if you are in your 12th, you should be appearing for B.Tech Entrance examinations like JEE, VITEEE, etc depending on the Institution that you want to study in. Few Colleges offer B.Tech in Computer Science Engineering with Cyber Security and Forensics. You need to appear for their Entrance examinations and study B.Tech with this specialisation. Post the completion of your course, you get placements accordingly.