Aleks Seovic focused on backend development for the ThingsBoard LangChain4j integration, addressing a critical stability issue in the CoherenceEmbeddingStore component. He corrected the Builder.index argument type, changing it from Vector<?> to float[], which eliminated runtime type errors in embedding pipelines and improved the reliability of embedding storage. Working primarily in Java, Aleks applied his expertise in API integration and backend systems to ensure type safety and smoother data handling within the repository. Although the work centered on a single bug fix, the solution demonstrated careful attention to type correctness and contributed to the overall robustness of the embedding infrastructure.