PHP developers needed, Asterisk

Backend software project for professionals, coded on for 15 years locally in South Africa, provides cloud file, SMS, fax, email client, cloud PBX, accounting system, and much more, need expert developers who can contribute significantly and at speed. Hurdles with old code, old technologies and many programmers who thought they can code who 'coded'. If you are 1. not an expert who is prepared to take on a challenge 2. not available 3. cannot code and read any php code at speed (no matter how bad the previous programmer was) 4. has the word 'impossible' in your vocabulary, please do not apply. We need someone who can read and rewrite existing code (often very old) in powerful ways. Prepared to negotiate substantial incentives or rates if coder successful on parts assigned. IP coded for us strictly owned by our company. CV and references required. Prefer 12 month contract full time in SA, but not an absolute requirement.