Senior ML Systems Engineer, Ads Platform

Reddit, Inc.; Northern (KY); Hybrid; USD 217,000 - 303,000; Full time

Benefits offered by this job

Healthcare benefits

401k with employer match

Mental health & coaching benefits

Parental leave

Family planning support

Job summary

Reddit is seeking a Senior Machine Learning Systems Engineer to design and operate large-scale offline ML experimentation platforms and training orchestration frameworks for the Ads ML Experience Platform. The role emphasizes reproducible research, scalable workflows, and robust model deployment in a remote-friendly US context.

You will collaborate with ML researchers and engineers to accelerate experimentation velocity, build artifact/versioning systems, and enable autonomous and

Qualifications

• 5+ years in infra/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 building workflow orchestration systems, developer platforms, or large-scale automation frameworks.
• Experience with distributed data processing systems such as Spark, Flink, Ray, or equivalent technologies.
• Experience with modern orchestration and workflow technologies such as Kubeflow, Argo, Airflow, or similar frameworks.
• Experience building offline ML experimentation platforms, model registries, experiment tracking systems, or training orchestration frameworks.
• Experience building and operating agentic AI systems, including multi-agent orchestration, autonomous workflows, and agent communication/runtime frameworks (e.g., MCP, A2A, and orchestration systems) is a strong plus

Responsibilities

• Design and build large-scale offline ML experimentation platforms that enable reproducible research, model development, evaluation, and promotion workflows.
• Develop production-grade training orchestration frameworks supporting distributed training, hyperparameter optimization, model evaluation, and automated retraining.
• Build infrastructure for experiment tracking, metadata management, lineage, artifact versioning, model registries, and reproducibility.
• Partner with ML engineers and researchers to improve experimentation velocity and operational efficiency.
• Build automated workflows for model promotion, rollback, compliance validation, and continuous evaluation.
• Design and build an agentic AI execution platform supporting autonomous and human-in-the-loop workflows, including multi-agent orchestration, memory/context systems, and scalable workflow infrastructure.

Skills

Large-scale distributed systems

Production ML infra

Workflow orchestration

Distributed data processing

Agentic AI systems

Multi-agent orchestration

Model registries

Experiment tracking

Tools

Spark

Flink

Ray

Kubeflow

Argo

Airflow

Job description

Reddit is seeking a Senior Machine Learning Systems Engineer to design and operate large-scale offline ML experimentation platforms and training orchestration frameworks for the Ads ML Experience Platform. The role emphasizes reproducible research, scalable workflows, and robust model deployment in a remote-friendly US context.

You will collaborate with ML researchers and engineers to accelerate experimentation velocity, build artifact/versioning systems, and enable autonomous and