Principal Machine Learning Engineer

$264,000 – $363,000 · Posted 1 day ago

San DiegoLast seen today

Summary

Principal Machine Learning Engineer leading mission-critical AI capabilities at AppFolio's real estate platform (Realm-X). You will architect and deploy advanced AI agentic systems combining reasoning, planning, and execution across property management domains (maintenance, leasing, accounting, collections), establish ML platform primitives for context-aware automation, and drive the transition toward autonomous property management. You'll build scalable, multi-modal AI applications with production excellence standards, implement reinforcement learning for agent policies, and own the full ML lifecycle from data collection through deployment. Required: Master's/Ph.D. in CS or ML, 10+ years building software with significant ML/AI focus, hands-on LLM post-training experience (SFT, RLHF, DPO, RL), expert-level Python/PyTorch/AWS, and shipped production systems with academic publications.

Data Science DevOps / Infrastructure AWS Docker Machine Learning Python SQL Agentic AI AI Architecture Deep Learning Dpo Embeddings Generative AI LangChain Langgraph Langsmith LLM Large Language Models Mlops Model Deployment Model Evaluation Model Training Multi Agent Systems Numpy Prompt Engineering PyTorch RAG Retrieval Augmented Generation Reinforcement Learning Retrieval Augmented Generation Rl Rlhf Sft Supervised Fine Tuning System Design Vector Databases