Speaking from my own perspective of running general tech job boards [1], I would say that too narrow job boards have a really short lifespan. This is because, you need a good supply of fresh offers to keep the audience. So if you end up to niche, you quickly become a job-ad-graveryard. Unless you scrap other big job sites automatically and somehow manage to filter and classify the jobs based on your niche. [1]... - Source: Hacker News / 8 months ago

How about: devitjobs.uk / devitjobs.us / germantechjobs.de - all jobs with salary brackets. Source: over 1 year ago

DevITjobs UK : Transparent job board for UK based developers. - Source: dev.to / over 1 year ago

Have you tried: devitjobs.us / devitjobs.uk? Source: over 1 year ago

We are running devitjobs.uk and devitjobs.us (in the philosophy of SO Jobs: transparent salary ranges, tech stack, methodologies). Source: over 1 year ago

Https://angel.co/jobs (positions on startups). Source: 12 months ago

Https://angel.co/jobs Https://hired.com/ Https://landing.work Https://remotive.com/ Https://weworkremotely.com/. Source: about 1 year ago

Try looking for jobs online. I worked temporarily in a startup here I found here - Find Startup Jobs Near You and Remote Jobs | Wellfound (formerly AngelList Talent) idk if I can share links here. Source: about 1 year ago

Apply for startup jobs on Angel List. There’s way less competition, and you can sell yourself better. Source: over 1 year ago

I'd suggest taking a look here for jobs though: Https://weworkremotely.com/ Https://angel.co/jobs. Source: over 1 year ago