I am learning English, because I want to work in the USA.

I am an Electronic and Communication Engineer.

p.s. you put 'the' infront of USA and UK. Try write more next time. :)

I am learning English, because I want to work in USA

I am an Electronic and Communication Engineer

I am learning English because I want to work in the USA. 

I am an Electronic and Communications Engineer. 

Tips:

• When you want to end a sentence, insert a period.

• "I am" can also be said, "I'm." It is the shorter way to say it. It's called a "contraction." (But it doesn't matter which way you write it because it means the same thing. What you wrote was just fine.)

• In your first sentence, you shouldn't have used a comma between the words "English" and "because." It should all run together without any breaks in the sentence.