Machine Learning Systems Engineer, Ads ML Platform

Stack

Responsibilities

• ▹Design and build data infrastructure supporting large-scale feature and training set computation, transformation, and storage
• ▹Develop frameworks for batch and real-time features, focused on reliability, scalability, and ease of use
• ▹Build platform capabilities for feature governance: lineage tracking, validation, drift detection, anomaly monitoring, reproducibility, versioning
• ▹Partner with ML engineers to ensure smooth integration of feature engineering workflows into production systems
• ▹Build systems supporting agentic ML workflows: automated feature discovery, quality evaluation, lifecycle management
• ▹Contribute to operational excellence through observability, performance tuning, reliability engineering, and cost optimization

Requirements

• ▹3+ years in data infrastructure/platform engineering or ML infrastructure platforms
• ▹Hands-on experience building production services, data pipelines, APIs, workflow systems, or developer tools
• ▹Experience with at least one distributed data or compute system (Spark, PySpark, Flink, Kafka, Ray, Airflow, Kubernetes, BigQuery, or similar)
• ▹Familiarity with ML data workflows: feature generation, training dataset creation, batch/real-time processing, model training, experimentation, or online serving
• ▹Strong coding skills, writing clean, maintainable, well-tested code

Nice to have

• ▹Experience building intelligent automation or agentic workflows for ML systems
• ▹Experience with ML infrastructure and MLOps workflows spanning feature engineering, training, experimentation, deployment, and online serving

Soft skills

What we offer

• ▹Global benefit programs for workspace, professional development, and caregiving support
• ▹Family planning support
• ▹Gender-affirming care
• ▹Mental health & coaching benefits
• ▹Group personal pension scheme with employer match
• ▹Private medical and dental scheme
• ▹Income replacement programs
• ▹Bike to work scheme
• ▹Flexible vacation & paid volunteer time off
• ▹Generous paid parental leave

About the company

Reddit is a community of communities where people share, discuss, and vote on the topics they care about. With 100,000+ active communities and approximately 126 million daily unique visitors, Reddit is one of the internet's largest sources of information. The team works flexibly, and this role can be done remotely from the UK or the Netherlands.