Ask HN: H1-B / L-1 Visum as a European

I'm a SRE in Europe with 7+ years of experience and my girlfriend got invited to work on a research project in the USA. So currently I'm investigating job options to move (probably temporary, but who knows) to the US. I've been to the US multiple times and stayed there a couple of month in my late teens early 20ies since I have some relatives living there, but I never worked in the US.

I don't have a problem finding jobs in my field in Europe, but after writing about 20 applications I didn't get a single interview and only got "we don't do VISA sponsoring" as a response. I specifically always checked if it said "no visa" in the description. I would be very grateful for any tips to get a visa.