Development / support of advertising networks of holding, which deals with the advertising business, namely RTB advertising (banners, teasers and others).
Development and modification of many different RTB systems: SSP, DSP, advertising exchanges, advertising networks, management systems of all this and much more.
Development of Binary Options Trading platform (binatex.com) . Stack: Golang, GRPC, Protobuf, Postgresql, Tarantool
My own freelance development