## ML Engineer, AI Engineer, or LLM Engineer: Which Role Actually Builds What in 2026? Same job postings, different titles. Here's what each role actually builds. Open three job boards and search "AI." One company calls the role AI Engineer. Another calls it Applied AI Engineer. A third calls it LLM Engineer. The listed responsibilities look almost identical: Python, an API key for a language model, some mention of retrieval, a line about "production reliability." Look closer, and the specifics move too. One posting wants LangChain experience. Another wants fine-tuning experience with LoRA. A…