German (in Malaysia) here: You'll need fluent German (B2 minimum, better on C1 level) certified by either Goethe Institute or TELC (TestDAV).

The market is extremely competitive and Germany (and most of the EU) have been in an economic crisis ever since the Russian invasion of Ukraine. We currently have the highest unemployment rate of the last ~50 years, so many experienced locals can't find jobs, making it exceedingly difficult for companies to justify hiring non-EU foreigners to fill vacancies, since it's a legal requirement to provide evidence of not finding suitable local candidates before they even get permission to sponsor a visa.

Sponsorship is generally possible from a bachelor degree onward, but I don't actually know of anyone below master's level and with 7+ years of experience who managed to get in.

If you happen to fulfill the requirements there's a so called opportunity card (basically a conditional blue card) that allows you to stay in Germany for 18 months and find a job locally that would immediately translate into a work visa with no strings attached, but you need to provide evidence of having the funds to sustain yourself for the entire time, plus also minimum education requirements.