Senior Data Scientist, Safety Enforcement — Remote

Reddit; United States; Remote; USD 191,000 - 267,000; Full time

Benefits offered by this job

Equity in RSUs

401(k) with employer match

Medical/Dental/Vision insurance

Generous PTO and parental leave

Job summary

Reddit is seeking a Senior Data Scientist for Safety Enforcement Data Science to own defined enforcement areas and translate policy into measurable signals, labels, and rules. You will prototype models, evaluate detectors, and work with Product, ML, Policy, Safety Operations, and Threat Intelligence to scale mitigations.

This hands-on role may involve exposure to sensitive content and on-call rotations. Remote-friendly within the United States with optional office visits.

Qualifications

• Ph.D. with 4+ years OR Master’s degree with 8+ years of relevant industry experience in Data Science, Applied Science, Economics, or related quantitative field.
• Applied experience in safety, enforcement engineering, fraud, or similar adversarial domains.
• Expertise in SQL and Python to write production-grade, reusable analytical code and data pipelines.
• Strong background in statistics, experiment design, causal modeling, and ML techniques (classification, ranking, anomaly detection).
• Practical knowledge of evaluating real-world decision systems, including sampling, label quality, class imbalance, precision/recall, calibration, drift, and monitoring.
• Proven ability to deconstruct ambiguous problems into scorable components and drive decisions with cross-functional teams.
• Exceptional communication skills with ability to convey complex technical concepts to technical and non-technical stakeholders.

Responsibilities

• Own the enforcement lifecycle from framing and signals discovery to labels, taxonomy, model or rule development, rollout, and monitoring.
• Analyze large-scale behavioral and content data to identify adversarial patterns and gaps in mitigations.
• Build and evaluate decision systems using ML methods and rule-based approaches.
• Define evaluation standards addressing precision, recall, calibration, coverage, robustness, and fairness.
• Ship with engineering partners to productionize approaches, defining data, logging, guardrails, monitoring, and rollback criteria.
• Translate policy and product requirements into modelable targets, labels, rules, and reviewer workflows.
• Design staged rollouts and experiments to test interventions while managing false positives and downstream effects.
• Support investigations and post-incident analyses, turning findings into durable improvements.
• Scale the team’s impact by creating reusable datasets, evaluation harnesses, and clear documentation.
• Stay ahead of threat landscape by applying new AI methods and advancement in detection techniques.

Skills

SQL

Python

Statistical analysis

Experiment design

ML techniques

Communication skills

Policy collaboration

Education

Ph.D.

Master's degree

Tools

NLP

GenAI methods

Language models

Graph analysis

Job description

Reddit is seeking a Senior Data Scientist for Safety Enforcement Data Science to own defined enforcement areas and translate policy into measurable signals, labels, and rules. You will prototype models, evaluate detectors, and work with Product, ML, Policy, Safety Operations, and Threat Intelligence to scale mitigations.

This hands-on role may involve exposure to sensitive content and on-call rotations. Remote-friendly within the United States with optional office visits.