KThe type / kind of career I would choose.

Currently I work with software development, but Iif I could choose another career, probably I would choose to work within digital marketing.

Currently I work within software development, but If I could choose another career, I would probably I would choose to work within digital marketing.

BThis is because I think that selling digital marketing products and services is more scalable than selling and developing software, so. So, it will be more profitable.

Making it into two sentences will make it flow better and sound more like a native speaker

Currently I work within software development, but If I could choose another career, I would probably I would choose to work within digital marketing.

Because I think that selling digital marketing products and services is more scalablein demand than selling and developing software, so it willould be more profitable.