[BilalBudhani]

I would suggest start with writing your insights about the language in the form of blog post which would be a good start point of attracting audience who are into this niche. This may lead to some folks reaching out to you for work.

If you're consider doing full-time consulting work in future then this strategy could lay a good ground work to build credibility in the niche.

[imhoguy]

This. As you are an expert in your niche now you need some personal marketing too. Cater code and articles about performance and business cases for your tech stack to these niche communities. It may bring you necessary recognition so one day some CTO may ask you to join their ship.