I have developed mobile applications such as VoIP (Linphone), Traveling guide, and applications for disabled people over the four years of iOS development (both Obj-C and Swift) over VIPER architecture.
Now, I mainly lead for developing WebRTC (work on Kurento Media Server) and other backend services (written with Golang) in the Thailand's real-time captioning service. All of services are running in software container (Docker) and easier to scaling in cloud platform.