Principal Machine Learning Engineer

AppFolio

$264,000 – $330,000 · Posted 1 day ago

San DiegoLast seen today

Summary

Principal Machine Learning Engineer at AppFolio to architect and lead mission-critical AI systems across the Realm-X property management platform. You'll design advanced AI agentic systems combining reasoning, planning, and execution; establish ML platform primitives for end-to-end production workflows; and drive the transition toward autonomous property management using LLMs, fine-tuning, and reinforcement learning. Requires 10+ years building software systems with deep expertise in traditional ML, deep learning, generative AI, LLM post-training (SFT, RLHF, DPO, RL), and production ML at scale—plus a Master's or Ph.D. in Computer Science or related field.

Data Science DevOps / Infrastructure AWS Docker Machine Learning Python SQL Agentic AI AI Deep Learning Dpo Embeddings Fine Tuning Generative AI LangChain Langgraph Langsmith LLM Large Language Models Mbse Numpy Observability OpenAI Prompting PyTorch RAG Retrieval Augmented Generation Reinforcement Learning Rlhf Sft System Design Vector Databases