This is exactly what happens on Honeypot (Germany and Netherlands focused).
Honeypot is a developer focused job platform where companies apply to developers, rather than developers applying to jobs. We want to make the hiring process as transparent as possible and for that reason on Honeypot companies apply to developers with tech stack, salary and product information upfront.
At the moment various companies are looking for Software Embedded developers to fill up their positions. If you're an open-source enthusiast, fluent in C and with experience with embedded systems, sign up here and after that companies will apply to you!