Yusen Dai is a managing partner at ZhenFund and a former cofounder and VP of Product at Jumei, where he helped scale a $45K startup into a NYSE-listed e-commerce leader within four years. He blends operator instincts in product, operations and marketing with a savvy angel-investor’s eye for early-stage TMT, consumer and deep tech opportunities across 1000+ portfolio companies. Technically hands-on, Yusen contributes to Android open-source projects—improving UI/UX components like image sliders, swipe layouts and view animations—which reflects his ongoing interest in shipping polished client-facing experiences. A Tsinghua-trained industrial engineer who attended Stanford’s Management Science & Engineering program, he pairs rigorous systems thinking with startup pragmatism. Based in Beijing’s Chaoyang District, he’s known for bridging founding-stage product execution with seed-stage capital and mentorship. Notably, his background spans both building mass-market consumer products and active technical contributions to widely used Android libraries.
12 years of coding experience
9 years of employment as a software developer
Bachelor of Science Industrial Engineering, Bachelor of Science Industrial Engineering at Tsinghua University
dropout Management Science & Engineering, dropout Management Science & Engineering at Stanford University
Contributions:36 commits, 9 PRs, 13 pushes in 3 years 2 months
Contributions summary:Yusen primarily contributed to the Android application's codebase, focusing on the `NumberProgressBar` component. Their work included fixing typos, adding attributes for progress text visibility, supporting custom suffixes and prefixes for the progress text, and implementing status save and restore functionality. They also addressed a specific issue related to the component, as indicated by the commit messages.
Contributions:30 commits, 2 PRs, 3 pushes in 9 months
Contributions summary:Yusen primarily contributed to the AndroidViewHover library, focusing on features related to displaying and dismissing hover views. Their commits added functionality to control hover visibility, including methods for showing, dismissing, and toggling the hover state. Key modifications involved adding hover status tracking, animation control, and fixing issues related to layout and visibility of the hover views.
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