All Services Programming & Development Voip Developer $8/hr · Starting at $25 I am a 2 + year experienced voip developer who can work on open source sip technologies like asterisk and opensips. About $8/hr · Ongoing Download Resume I am a 2 + year experienced voip developer who can work on open source sip technologies like asterisk and opensips. Skills & Expertise AsteriskDeveloperOpenSIPSSipSmppVoIP 0 Reviews This Freelancer has not received any feedback. Browse Similar Freelance Experts VoIP Services