You should use $database->insertRow
instead.
Try this.
$data = array(
'full_name' => $full_name,
'date_of_birth' => $date_of_birth ,
'gender' => $gender ,
'cnic' => $cnic ,
'city' => $city ,
'country' => $country ,
'region' => $region ,
'contact_number' => $contact_number ,
'email_address' => $email_address ,
'degree_title' => $degree_title ,
'university' => $university ,
'gpa' => $gpa ,
'division' => $division ,
'banking_experience' => $banking_experience ,
'current_organization' => $current_organization ,
'job_title' => $job_title ,
'non_banking_experience' => $non_banking_experience ,
'non_current_organization' => $non_current_organization ,
'non_job_title' => $non_job_title
);
$result = $database->insertRow('jobform', $data);
Please see official documentation