Senior Machine Learning Engineer
Core
Building and deploying security-focused ML models to detect and prevent GenAI risks like prompt injection, jailbreaks, and data exfiltration across Reddit's AI traffic.
Role type
Senior IC machine learning engineer (GenAI security)
Builds
Production ML models, MLOps pipelines, and security guardrails for Reddit's GenAI systems
Domain
Internet / Generative AI Security
Deliverable
production ML models
Required skills
Deep learning model development, full ML lifecycle ownership, data pipeline engineering, adversarial ML evaluation, Python/Go software development
Preferred skills
GenAI security experience, neural text model fine-tuning, production MLOps systems, hard-negative mining, model distillation
Technologies
PyTorch, TensorFlow, Airflow, Ray, MLflow, Triton, ONNX, Kubernetes
Responsibilities
Define security problems and assemble labeled datasets, build ETL pipelines and engineer features, train and evaluate models for precision/recall/latency, deploy to production and monitor performance, build repeatable MLOps workflows, provide technical direction to engineers
Seniority
Senior, hands-on IC