I am an experienced software engineer in C/C++ and Qt/QML framework for native application development on multiple platforms, both desktop and mobile.

My main focus are VoIP applications like soft-phones, auto diallers, recorders, etc. using PJSIP library for providing the SIP protocol stack. While usually VoIP applications are server based, they can be used without a server, i.e. peer to peer, as long as both participants are in the same network (LAN or VPN).

I have implemented a peer to peer soft-phone using PJSIP library with voice support and I plan to add support for chat, video and file transfer. The communication shall be encrypted end to end using TLS. I plan to extend this VoIP application by adding support for blockchain. This should allow for improved security and to communicate even when the peers are not in the same LAN.

Besides this application, I am also developing other projects that I find useful, like an application for keeping fiscal records in CSV files.

I am looking for sponsors in order to finance the development of my applications. I am also available for customising the applications for specific needs.