Hello

Yes you can always change your field just make projects in different programming languages and practice coding problems in websites like hackerrank and letscode make a strong CV from now.

After doing your graduation join a startup with software profile and gain experience for around 1-2 years after that that would be a lot necessary, after that you can go for software field and if you have made your profile strong then you are good to go for Google,Microsoft,etc.

Hope it helps.