Worked on enhancing OpenAI embeddings within the 0xPlaygrounds/rig repository, focusing on configurability and user personalization. Developed new API features in Rust, introducing an encoding_format parameter with an enumeration to support multiple encoding options and optimize performance. Added a user parameter to the EmbeddingModel, enabling user-scoped embeddings for improved personalization and tracking. Prioritized backend stability by iteratively refining parameter handling and ensuring consistent code formatting with cargo fmt. Collaborated on release preparation, integration testing, and downstream analytics. Demonstrated skills in API development, backend engineering, and Rust, delivering a targeted feature that expands configuration options and user association capabilities.