Senior ML Engineer — Voice AI for Realm-X (Remote)

AppFolio, Inc; Columbus (OH); Hybrid; USD 167,000 - 209,000; Full time

Job summary

AppFolio is hiring a Senior Machine Learning Engineer to design and ship AI-powered voice and text agents within Realm-X. You will shape production voice pipelines, work with cross-functional teams, and translate cutting-edge agent research into reliable, low-latency experiences for our real estate customers.

The role emphasizes building scalable pipelines, improving agent quality, and mentoring a small team, with hybrid work and a strong focus on performance and reliability.

Qualifications

• Shipped production AI agents serving real users in voice/text channels.
• Experience building pipelines and large-scale systems.
• Able to balance latency and reasoning in real-time applications.
• Collaborative with product and design teams; leadership experience.

Responsibilities

• Ship voice & text agent pipelines for real-time interactions.
• Balance reasoning depth vs latency across LLMs and models.
• Lead a small pod of ML and platform engineers.
• Define KPIs, eval harnesses, and acceptance criteria for agent quality.
• Optimize voice latency and costs via targeted fine-tuning.

Skills

Production AI agents

Pipelines & systems

Python

Async programming

WebSockets

Leadership

Tools

LangChain

LangGraph

LangSmith

LangChain Deep Agents

Twilio

AWS

Docker

WebRTC/voice tech

Job description

AppFolio is hiring a Senior Machine Learning Engineer to design and ship AI-powered voice and text agents within Realm-X. You will shape production voice pipelines, work with cross-functional teams, and translate cutting-edge agent research into reliable, low-latency experiences for our real estate customers.

The role emphasizes building scalable pipelines, improving agent quality, and mentoring a small team, with hybrid work and a strong focus on performance and reliability.