Currently the ARK Community Fund (ACF) is looking for a PHP developer that would be interested in developing and integrating Sodium (http://php.net/manual/en/book.sodium.php) into the ARK PHP-Client (https://github.com/faustbrian/ARK-PHP-Client) to sign transactions.
Instead of Sodium we would also accept https://github.com/Bit-Wasp/bitcoin-php to get rid of the ark-js dependency.
Currently the PHP client is using ARK-JS to sign transactions, but with PHP 7.2 a new cryptography library, Sodium or Bit-Wasp, is available that could replace the current implementation.
You should be familiar with PHP, PHPUnit and either Sodium or Bit-Wasp libraries.
- Sodium or Bit-Wasp