tokenization , Pyspark, ELT, Numpy, Python, Data Structures, Sql, Oop, Algorithms, Backend Development, Pandas, System Design, Rest Apis, Etl, data manipulation libraries, embeddings, data pipelines, HuggingFace, NLP fundamentals, AI summarization tools, Machine Learning techniques, AI GenAI LLM-based chatbot, Transformers, LLMs, prompt engineering, OpenAI