Blockchain systems use different consensus algorithms. The popular ones are the Proof of Work (PoW) and Proof of Stake (PoS). Proof of Burn is relatively new but is already used by different blockchain systems.
In December 2021 the New Zealand Government approved a Class Exception for certain tech workers to come to New Zealand as critical workers.
This means that eligible companies may bring eligible people to New Zealand as "Other Critical Workers" holding a Critical Purpose Visitor Visa, provided they meet the criteria and are nominated by the industry via the process outlined here.
The Class Exception allows for 600 workers who, if eligible, may bring partners and children with them. All applications are also subject to general immigration requirements such as character and health criteria.