Senior ML Systems Engineer – Scalable Ads Platform (Remote)

EngineersOfAI; Northern (KY); Hybrid; USD 140,000 - 210,000; Full time

Job summary

Reddit is seeking an experienced engineer to build and operate large-scale ML infrastructure and agentic AI tooling. You will design offline experimentation platforms, training orchestration, and model registries, collaborating with ML researchers to accelerate experimentation and deployment.

You will shape workflows for automated model promotion, rollback, and continuous evaluation while enabling autonomous and human-in-the-loop execution.

Qualifications

• 5+ years in infrastructure/platform engineering or large-scale distributed systems.
• 2+ years building and operating production ML infrastructure, developer SDKs, platform APIs, or self-service AI tooling.
• Experience with distributed data processing systems such as Spark, Flink, Ray, or equivalent.
• Experience with orchestration/workflow technologies such as Kubeflow, Argo, Airflow, or similar.
• Experience building offline ML experimentation platforms, model registries, and experiment tracking.
• Experience building and operating agentic AI systems, including multi-agent orchestration and autonomous workflows.

Responsibilities

• Design and build large-scale offline ML experimentation platforms enabling reproducible research and model development.
• Develop production-grade training orchestration frameworks for distributed training and hyperparameter optimization.
• Build infrastructure for experiment tracking, metadata management, lineage, and model registries.
• Partner with ML engineers and researchers to improve experimentation velocity and efficiency.
• Create automated workflows for model promotion, rollback, and continuous evaluation.
• Design an agentic AI execution platform supporting autonomous and human-in-the-loop workflows.

Skills

Large-scale distributed systems

ML platform engineering

Workflow orchestration

Distributed data processing

Agentic AI systems

Multi-agent orchestration

Autonomous workflows

Model training orchestration

Tools

Spark

Flink

Ray

Kubeflow

Argo

Airflow

MCP

A2A

Job description

Reddit is seeking an experienced engineer to build and operate large-scale ML infrastructure and agentic AI tooling. You will design offline experimentation platforms, training orchestration, and model registries, collaborating with ML researchers to accelerate experimentation and deployment.

You will shape workflows for automated model promotion, rollback, and continuous evaluation while enabling autonomous and human-in-the-loop execution.