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Re:Show HN: OhMyCo.in – Real-time charts for cryptocurrency ... by ArturSoler on Wednesday November 22, 2017 @01:59PM (#15759442)
The frontend is built with ScalaJs and React (using https://github.com/japgolly/scalajs-react).

The backend is built with Scala too, mostly using Akka Streams for the data handling. As a database it uses Cassandra.

edited - word choice

Re:Show HN: OhMyCo.in – Real-time charts for cryptocurrency ... by tstyle on Wednesday November 22, 2017 @08:14PM (#15762082)
The chart and the depth graph looks great, how did you build those?
Re:Show HN: OhMyCo.in – Real-time charts for cryptocurrency ... by ArturSoler on Thursday November 23, 2017 @01:46AM (#15763290)
It's all SVG elements
Re:Show HN: OhMyCo.in – Real-time charts for cryptocurrency ... by jadbox on Wednesday November 22, 2017 @04:01PM (#15760593)
Woh, neat stack.