Sr. Machine Learning Engineer

$167,200 – $229,900 · Posted 1 day ago

San DiegoLast seen today

Summary

AppFolio seeks a Senior Machine Learning Engineer to architect and ship voice and conversational AI agents within their Realm-X platform. You'll design production voice and text agent pipelines handling real-time, multi-turn interactions, balancing reasoning depth against latency across frontier and smaller LLMs. You'll lead a small pod of ML and platform engineers, define agent quality KPIs and evaluation harnesses, and optimize Small Language Models for voice latency and cost. The role requires 5+ years shipping web applications in SaaS, with shipped production experience in voice/text AI agents using agent frameworks like LangChain, voice stacks (TTS/STT), Twilio, AWS, and expert Python with async programming.

Data Science DevOps / Infrastructure AWS Docker Machine Learning Python Agent Frameworks Async Programming Deep Learning Fine Tuning GitHub Inference Optimization LangChain Langgraph Langsmith LLM Large Language Models Model Evaluation Observability RAG Retrieval Augmented Generation Small Language Models Structured Output Stt Tool Use Tts Twilio Voice To Voice Models Websockets