"...although I work in an adtech company with quite some technical challenges" There is your topic. Tell us about the technical challenges that come with imple

"...although I work in an adtech company with quite some technical challenges" There is your topic. Tell us about the technical challenges that come with implementing framework X or programming language X in the adtech space. Make your writing exclusively about the space and consistently blog whether it's once a week/month etc but be consistent. If you listen to the Software Engineering Daily podcast, for example, you will hear the main host Jeff Meyerson talking about various technical challenges associated with detecting bot traffic etc. Maybe write about that as well? Hope that helps.