Reddit jobs

Senior Machine Learning Engineer role on Reddit's GenAI Security team, part of the Security, Privacy, Assurance, and Corporate Engineering organization. You'll own the full ML lifecycle—from problem definition through production monitoring—building security-focused models to detect and prevent risks like prompt injection, jailbreak attempts, and unauthorized agent actions across Reddit's AI systems. Required: 5+ years building and deploying production ML/deep learning models, hands-on experience with PyTorch or TensorFlow, and strong understanding of data pipelines, feature engineering, model evaluation, and monitoring. This role is fully remote in the US and involves working cross-functionally with infrastructure, safety, and product teams to operationalize security models at scale. You'll provide technical direction on ML practices across the broader SPACE organization and design rigorous evaluations for adversarial examples and production traffic patterns.

Reddit is hiring a Staff Product Security Engineer to lead the design of secure frameworks, guardrails, and AI-aware controls that embed security into engineering workflows and prevent vulnerabilities at the platform level. The role sits within product security and focuses on making the secure path the easiest path as AI-assisted development accelerates code velocity. You'll design security controls for coding agents, build reusable frameworks that eliminate recurring vulnerability classes, drive architectural reviews, and mentor engineers across the org. Required: 8+ years in software engineering or security with 2+ years at staff level, proficiency in Go/Python/JS/TS, and proven experience building developer-facing platforms and secure libraries that scale across teams. You must have deep knowledge of CI/CD, code review, and vulnerability remediation pipelines, plus strong communication skills to influence both engineers and leadership. Deal-breaker: experience securing AI/LLM systems and agentic workflows is preferred but likely critical given the role's emphasis on closing the gap between AI-assisted development velocity and security review capacity.