While trying to access sandbox remotely we are getting the following error:
 
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

We have a short-term project which requires a certified force.com developer. Experienced with visualforce, custom objects, APEX and triggers.

 

Independent contractors preferred.