Looking for a developer in Argentina with experience in OJS

My name is Analía Basualdo and we are a scientific publisher located in Buenos Aires, Argentina.
One of our journals is developed in OJS and we need help to upgrade it to a new version of OJS.
We look for a free-lance developer in Argentina (or Latam) who can assist us with our needs on a project basis.
Experience with php and sql of OJS with other systems and databases would be appreciated.
Please send your cv or proposal to cuentas@noveltymed.com
Thanks in advance,
Analía Basualdo