1. Google Jobs — has a good cover for positions in the English speaking world. If you type in 'product management jobs' or 'software engineering jobs' into the search box, you should get a list of positions near the place you live in. If you want to relocate, add the desired location into your query.
2. LinkedIn — has a quite good search engine to start the job market research. In beta version you may see the expected salary and possible perks.
3. Glassdoor — similar to LinkedIn, that also has an info about the company, reviews from its employees etc
4. Target companies websites — go to websites of the companies you are interested in and look for the Careers or Jobs sections. Websites of FAANG companies:
- Startups— Angel.co (you can read about particular startups on Crunchbase)
- Stackoverflow — allows filtering by visa sponsored jobs
6. Russian speaking channels in Telegram: