Dean Hartsell

Former AI engineer at Lyft.

Dean Hartsell is an AI engineer with hands-on experience building scalable, production-grade systems, including work at Lyft where he contributed to data-driven platforms supporting millions of users. His technical expertise spans machine learning, natural language processing, deep learning frameworks such as PyTorch and TensorFlow, and the development and fine-tuning of large language models. He has worked extensively with transformer architectures, retrieval-augmented generation, prompt engineering, and model evaluation pipelines. Dean is proficient in Python, cloud infrastructure (AWS, GCP), MLOps tooling, and vector databases, and he brings practical experience deploying AI models from prototyping through production at scale. His focus remains on solving complex engineering problems with reliable and well-architected AI systems.