Rejoiners going onto a new fleet are subject to a bond. Question is, is it a paper bond with lots of promises or are the slimeballs actually taking money out of the first year joinining salary less 25%?
If its the former and no cash is removed then great. Sign all the papers they want you to sign. And when you find a new job with your fresh new type rating just walk away. Infact operate the aircraft to a destination that suits you and just dissappear.
Qatar Airways has plunged itself to the bottom of the employment barrel with such haste its unbelievable.
To new or rejoiners - take the job with both hands but use and screw the company before they can do it to you.