Yun-Fang Juan was a founding engineer on Facebook's ads team before becoming an investor, and she later joined portfolio company Soldsie as Chief Scientist after backing it, choosing to help solve its technical problems directly rather than staying purely hands-off. She also stands out for publishing a detailed breakdown of her 2012–2016 angel investments, including 39 deals, estimated returns, and how her results compared to the S&P 500 and Nasdaq—a level of openness not common among early-stage investors.