The front end might very well be heavily node influenced right now with React et al but I'm personally still seeing a lot of backend development being done in Python or Go. No doubt there's been a huge surge in demand due to React in particular but in many of the postings I've seen they seem to be talking to backends in Python/Java/C#. The contracting/getting paid for it landscape is still looking very bright for a lot of tech that doesn't have the buzz of node*.