Zein Wen, as a Google Summer of Code 2023 participant, collaborated with mentor Arnaud Gourlay to enhance the Qdrant vector database by developing a Polygon Geo Filter, which adds flexibility to geo-data queries by allowing users to refine results using polygons in addition to existing circular and rectangular filters. This feature was designed to align with the complex geographic boundaries users encounter, particularly in applications like restaurant recommendations that require neighborhood-specific filtering. The development process involved overcoming technical challenges such as implementing efficient geometry computations using geo hash layers and ensuring consistency in ProtoBuf and JSON interfaces, which led to the decision against a separate multi-polygon filter to maintain simplicity. This experience expanded Wen's problem-solving abilities and emphasized the importance of user-centric design and effective communication within development teams. Wen expressed gratitude for the support received during the program, which fostered a deeper understanding of open-source collaboration and inspired continued contributions to Qdrant, advocating for its adoption within the tech community.