WebGL, OpenGL, Shaders, Metal, TypeScript, Fullstack Web, Node, React (Native), Vue, SQL DBs, Mongo, C++, C#, C, Swift, Objective-C, some Unity, some Go and Rust, bit of iOS and macOS dev.

Publicly releasing smaller and larger (code) projects that I've been hoarding for a (long) time and mentoring those who wish to learn programming!

Stardazed (Web 3D Game framework), DTBB (a Ludum Dare games browser), A full implementation and polyfill for Web Streams, a growing number of NPM packages, several Jam games, etc.

I can help out with anything concerning development / programming (frontend, backend, mobile, from syntax details to large-scale project design);
I've also helped companies with hiring programmers, doing code interviews, etc.
I've mostly worked as a freelancer, so no real experience with career-building or working in large corporations.