Machine Learning Systems Engineer, Ads ML Platform

• Help build a scalable feature platform that powers Ads ML, making high-quality features and training datasets easy to build, share and maintain. • Work on projects spanning batch and real-time feature management, training set generation, sequence features, and agentic, automated ML workflows for feature lifecycle management. • Build reliable infrastructure, data pipelines and developer-facing tools that make ML engineers more productive, rather than working on pure ML modeling. • Join a small but growing team evolving and scaling Reddit's feature management systems. • Work fully remotely from anywhere in the UK or the Netherlands.

• Bring 3+ years in data infrastructure/platform engineering or ML infrastructure platforms. • Bring hands-on experience building production services, data pipelines, APIs, workflow systems or developer tools. • Work with at least one distributed data or compute system such as Spark, PySpark, Flink, Kafka, Ray, Airflow, Kubernetes or BigQuery. • Bring familiarity with ML data workflows such as feature generation, training dataset creation, batch processing, real-time data processing, model training, experimentation or online serving. • Bring strong coding skills and write clean, maintainable, well-tested code.

• Bring experience building intelligent automation or agentic workflows for ML systems. • Bring experience with ML infrastructure and MLOps workflows spanning feature engineering, training pipelines, experimentation, model deployment and online serving.

• Design and build data infrastructure that supports large-scale feature and training set computation, transformation and storage. • Develop frameworks for batch and real-time features with a focus on reliability, scalability and ease of use. • Build platform capabilities for feature governance, including lineage tracking, validation, drift detection, anomaly monitoring, reproducibility and versioning. • Partner with ML engineers to integrate feature engineering workflows smoothly into ML production systems. • Build systems that support agentic ML workflows, including automated feature discovery, feature quality evaluation and feature lifecycle management. • Contribute to operational excellence through observability, performance tuning, reliability engineering and cost optimisation.

• Join a flexible-first workforce working remotely from anywhere in the UK or the Netherlands. • Receive a Group Personal Pension Scheme with employer match, plus private medical and dental cover. • Take flexible vacation and paid volunteer time off, with generous paid parental leave. • Access family planning support, gender-affirming care, and mental health and coaching benefits. • Benefit from income replacement programs and a Bike to Work scheme.

Reddit is a community of communities, built on shared interests, passion and trust, and home to some of the most open and authentic conversations on the internet. With 100,000+ active communities and around 126 million daily active unique visitors, it is one of the internet's largest sources of information, where users submit, vote and comment on the topics they care most about.