OpenAI

OpenAI catalyzed the current AI revolution with GPT models and ChatGPT, demonstrating that large language models could achieve broad capabilities through scale and reinforcement learning from human feedback. The company's technical achievements span training models with hundreds of billions of parameters, building APIs that serve millions of requests daily, developing safety techniques like instruction following and refusal training, and creating products like DALL-E for image generation and Codex for code completion. Engineering at OpenAI involves distributed training infrastructure that coordinates thousands of GPUs, inference optimization to serve models cost-effectively, alignment research that makes models helpful and truthful, and product development that makes powerful AI accessible to non-experts. Their hiring priorities reveal investment in multimodal models, reasoning capabilities, and the infrastructure challenges of deploying increasingly capable systems. As the leading commercial AI lab, OpenAI's talent acquisitions signal which technical capabilities are essential for frontier model development.