Transitioning from agency to tech

Hey everyone, I taught myself how to code and launched a maps app earlier this year that was pretty successful - the only maps app to integrate with Instagram and reached #3 in Navigation Apps behind Google Maps and Waze. However I come from 6 years working in strategy at an advertising agency, and can’t seem to get my foot in the door at any of the larger tech companies. Anyone have any ideas for how to make it happen? Very strategic with strong design intuition and know I’d be a huge asset if I could just land the interview. Appreciate the help!