Learn how to build custom question-answering transformer models using the HuggingFace transformers library with PyTorch in Python. Discover the process of fine-tuning pre-trained transformer models for Q&A tasks, a powerful technique in Natural Language Processing. Explore practical implementation steps, gain insights into model performance optimization, and understand the significance of transformers in modern NLP applications. Access accompanying resources, including a detailed Medium article and code samples, to enhance your learning experience and apply these concepts to real-world scenarios.