Reddit

Senior Security Engineer, AI Security

Reddit
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2 months ago
Remote, United StatesSenior
H1B Sponsor

Base Salary

$191k - $267k/yr

Responsibilities

  • Review and threat model AI-powered product features, LLM integrations, agentic workflows, MCP servers, tools, plugins, retrieval systems, model outputs, and internal AI tools before launch.
  • Build reusable AI security primitives such as guardrails, scanners, policy checks, tool-use controls, registries, sandboxes, libraries, and workflow-native enforcement points.
  • Design security tooling in inference, retrieval, and execution paths to detect and prevent prompt injection, jailbreaks, tool misuse, data leakage, unsafe code generation, and suspicious agent behavior.
  • Partner with product and platform teams to define practical security controls for AI-enabled systems.
  • Find, fix, and prevent AI security issues while making required engineering changes clear and low-friction for partner teams.
  • Convert one-off AI security issues into systemic fixes, paved paths, measurable controls, and reusable guidance.

Requirements

  • At least 5 years of experience in product security, application security, software security, security engineering, backend engineering, or security platform engineering.
  • Strong application security fundamentals, including secure design review, threat modeling, code review, vulnerability prioritization, and practical remediation.
  • Experience building reliable backend services and security automation, developer tooling, libraries, infrastructure, or platform controls.
  • Familiarity with AI, LLM, or agentic system risks, including prompt injection, jailbreaks, insecure tool use, tool poisoning, data leakage, unsafe model outputs, and abuse of AI-assisted workflows.
  • Ability to reason across trust boundaries involving user input, model context, retrieval systems, backend services, tool calls, MCP servers, third-party integrations, sandboxed execution, logs, and frontend rendering.
  • Practical understanding of identity, authorization, network boundaries, secrets, cloud environments, containers, isolation, runtime policy enforcement, and least privilege.
  • Strong judgment in evaluating launch risk and sequencing practical remediations, along with clear communication of technical risks and business impact.
  • Preferred experience securing AI or LLM products, AI-assisted development tooling, agent frameworks, MCP-style ecosystems, retrieval-augmented generation systems, or model-integrated workflows.
  • Preferred experience building guardrails, policy engines, secure frameworks, scanners, linters, registries, gateways, or developer-facing security platforms.
  • Preferred familiarity with agent sandboxing, workload identity, network policy, tool permissioning, AI red teaming, LLM evaluation, machine learning systems, model evaluation, or AI data governance.
  • Experience with Go, Python, JavaScript, or TypeScript is preferred.
  • Preferred experience securing distributed systems or cloud-native applications, including Kubernetes, APIs, and microservices.
  • Track record of mentoring engineers or raising security standards through guidance, tooling, or reusable patterns.

Benefits

  • Remote role, as indicated by #LI-Remote.
  • U.S.-based employees may receive medical, dental, and vision insurance, a 401(k) program with employer match, generous vacation time, and parental leave.
  • Interviews may be recorded, transcribed, and summarized by artificial intelligence, with an option to opt out before scheduled interviews.
Reddit

About Reddit

1,001-5,000 employees

Reddit is the heart of the internet, where millions of people get together to talk about any topic imaginable. Share, vote, and decide what matters in everything from breaking news, to fandoms, lifehacks, gaming, sports, health, and the internet’s cutest animals. With over 100,000 subreddit communities about every topic you could think of (and thousands more you couldn’t), whatever it is, there’s a place for you on Reddit. Interested in joining our growing team? Check out redditinc.com/careers.