- Moscow, RU
- £7 /hr
- Available now
Over last 7 years I have successfully developed a wide range of applications for VoIP contact centers using C#, ASP.NET, Silverlight/WPF, WCF, C++, SIP, CallXML, distributed mediamore...Over last 7 years I have successfully developed a wide range of applications for VoIP contact centers using C#, ASP.NET, Silverlight/WPF, WCF, C++, SIP, CallXML, distributed media processing. I have made an effective research work in the field of speech recognition and artificial intelligence, there are considerable results. Now I am willing to help you with your project fulfilling.
Area Covered: Russia
Work Experience Summary: Role: Senior Softwar Developer, Project Manager
Company profile: VoIP applications development (SIP, IVR, call centers, speech recognition)
Responsibilities: Project management, coding, testing, tech. support, consulting, configuration of VoIP gateways, scientific research.
Job#1 title: SIP Application Server.’
SIP application server has been developed for Windows using C# and C++. It is a set of modules that can be used for VoIP software such as IP-PBX, call centers, predictive dialers, call forwarders, IVR hosting services. The server provides high-level API to control calls and it is able to execute CallXML scripts. Multiple distributed media servers are used to process media streams, the application server controls them using third party call control (RFC3725).
Job#2 title: SIP registrar/router.
SIP registrar/router works like a stateful proxy server with advanced routing options (called number analysis, re-routing on failure, random routing).
Job#3 title: IP-PBX service host (multi-tenant IP-PBX).
Clients configure their PBX settings using silverlight web browser plugin. The plugin does access to the settings using WCF (HTTPS)’
Responsibilities: complete development for project including design, coding, testing, installation and tech. support
Open source projects used: PJSIP (some bugs were fixed)
Technologies: SIP (RFC3261, RFC3264), refer (RFC3505), third party call control (RFC3725), .NET, STL, VS2010, Linq2XML, WCF
Job#4 title: VoIP Media Server
Media server was developed for Windows using C++ and C#. It is a set of modules that can be used for encoding, decoding, mixing, proxying RTP audio streams and T.38 fax streams, for playing and recording audio files, for sending and receiving TIFF files. Advanced multithreading mechanism is used to distribute media processing over several CPUs. The media server is controlled by application server using SIP protocol.
Responsibilities: complete development for project including design,’ coding, testing, installation and tech. support
Open source projects used: PJSIP (some bugs have been fixed), ITU-T audio codecs libraries, libtiff, spandsp
Technologies: SIP (RFC3261), RTP (RFC3550), third party call control (RFC3725), G.711, G.723, G.729, T.38, .NET, STL, VS2010, Linq2XML