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Great question! I don't know the answer, but I will try to find out.

This is probably overkill, but these are the specs of the server I am running it on:

  • OS: Ubuntu Server 16.04 LTS
  • Processor: Intel Xeon E3 1225v2
  • Frequency : 3.2 GHz+
  • Cores: 4
  • Threads: 4
  • RAM: 16 GB DDR3
  • HD: 3 x 120 GB SSD
  • RAID: Soft

[Edit] I am going to ask around, but it might take me a bit to get an answer.

Yes, that's an overkill for simple dev work, but only when you connect to external steemd full node, like in your example: wss://node.steem.ws.
You would definitely need that hardware when you want to run full node by yourself (with twice as much RAM)

The answer that I got from the dev team is not really, but good CPU is most important. Also, a 2011mbp with 2.3ghz i5 is a little slow for dev work but it works.

I'm not 100% sure on this, but I would estimate 8 GB for RAM. 4 could work, but IDK.

@gtg also comment below regarding running a local instance of steemd vs. connecting to wss://node.steem.ws. This will make a big difference as well.