3 weeks ago

Senior Security Engineer, AI Security

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 2 hours agoStatus: Live

Job Summary

Help secure Reddit’s AI-powered products by reviewing designs, threat modeling LLM and agentic workflows, and building reusable AI security primitives. Partner with teams shipping AI platforms to define controls across inference, retrieval, tool use, and execution paths—detecting prompt injection, jailbreaks, tool misuse, data leakage, and unsafe outputs. Turn one-off issues into scalable guardrails, scanners, sandboxes, libraries, and measurable platform-level fixes.

Location: United States

Workplace: Remote

Employment Type: Full time

Job Function: Cybersecurity

Seniority: Mid level

Key Responsibilities

•Review and threat model AI-powered product features, LLM integrations, agentic workflows, MCP servers, tools, and retrieval systems before launch.
•Build reusable AI security primitives including guardrails, scanners, policy checks, registries, sandboxes, libraries, and workflow-native enforcement points.
•Design security tooling that can detect and prevent prompt injection, jailbreaks, tool misuse, data leakage, unsafe code generation, and suspicious agent behavior along the AI path.
•Partner with AI product and platform teams to define practical security controls that match how they design, build, and ship.
•Proactively find, fix, and prevent AI security issues, converting one-off findings into systemic fixes, reusable guidance, and measurable controls.

Pay and Benefits

Salary: USD 190,800 - 267,100 annually

Equity and Bonus:Equity

Perks:Health InsuranceDentalVision401kPaid LeaveParental Leave

Key Requirements

•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.
•Hands-on experience building security automation and developer tooling, libraries, infrastructure, or platform controls.
•Familiarity with AI/LLM or agentic risks such as prompt injection, jailbreaks, insecure tool use, tool poisoning, data leakage, unsafe model outputs, and abuse of AI-assisted workflows.

Experience:5+ yearsProduct securityApplication securityBackend engineeringSecurity engineeringAI/LLM security

Skills:CommunicationEngineering judgmentBuilder instincts

Languages:English

Tech Stack:LLMAgentic workflowsMCPRetrieval systemsPrompt injectionJailbreaksTool-use controlsGoPythonJavaScriptTypeScriptKubernetesAPIsMicroservicesCI/CD

Company Brief

Operates Reddit, a large online community and discussion platform where users submit content, comment, and vote across topic-based communities (subreddits); monetizes via advertising, premium subscriptions, and awards.

Industry: Digital Media

Company Size: Enterprise (1,001+ employees)

Growth: Public Company

Valuation: Public Company (Market Cap in USD)

Funding: IPO / Publicly Listed

Headquarters: San Francisco, United States

Founded: 2005

Website LinkedIn

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