PitchBook News & Analysis | Drop, a rewards app start-up, snags Airbnb's former head of engineering CNBC Besides bringing on a new, high-profile head of engineering, Drop also closed a $21 million series A funding round led by New Enterprise Associates. Additional investors included Sierra Ventures, White Star Capital, ff Venture Capital and others. The ... Here's why the former Airbnb head of engineering joined a 30-person startup |