The top 10 cities with the most tech jobs can vary depending on various factors and can change over time. However, here is a list of cities that have consistently been considered tech hubs:

1. San Francisco, California, USA
2. Seattle, Washington, USA
3. San Jose, California, USA
4. New York City, New York, USA
5. Austin, Texas, USA
6. Boston, Massachusetts, USA
7. London, United Kingdom
8. Bangalore, India
9. Tel Aviv, Israel
10. Berlin, Germany

Please note that this list is not exhaustive and other cities, such as Los Angeles, Chicago, Toronto, Dublin, and Tokyo, also have thriving tech sectors. The ranking may also vary depending on the specific criteria used to measure the number of tech jobs in a city.