Security Engineer, Anti-Abuse jobs in United States
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Replit · 5 hours ago

Security Engineer, Anti-Abuse

positionFoster City, CA
timeFull-time
remoteOnsite
seniorityMid, Senior Level
money$193K/yr - $250K/yr
date4+ years exp

Replit is a software creation platform that enables anyone to build applications using natural language. The Anti-Abuse team is responsible for defending the platform from exploitation by detecting and shutting down phishing deployments, preventing cryptomining, and stopping other forms of abuse. The role involves building detection systems and automated responses to keep ahead of attackers.

Artificial Intelligence (AI)Cloud ComputingDeveloper ToolsInformation TechnologySoftware
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Growth Opportunities
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H1B Sponsor Likelynote

Responsibilities

Design and implement LLM guardrails that detect abuse scenarios in AI-generated code and agent interactions
Build AI-powered detection systems that use LLMs to identify malicious patterns, classify threats, and automate response decisions
Build and operate abuse detection systems that identify phishing, cryptomining, account takeover, and financial fraud across millions of daily user actions
Design automated response mechanisms that enforce platform policies without manual intervention
Own the full abuse response lifecycle: detection, investigation, enforcement, and handling appeals alongside Support and Legal
Analyze attack patterns using BigQuery and Hex, turning investigation findings into new detection rules
Maintain and extend internal detection tools (Slurper, Netwatch) that continuously monitor user activity
Integrate and tune security scanners (SAST, SCA) in CI pipelines with tight performance SLAs
Track abuse trends, measure detection effectiveness, and adapt defenses as attack patterns evolve

Qualification

Security engineeringPython programmingML/LLM classifiersSQL data analysisBigQueryCI/CD security toolingInvestigative skillsAttack patternsClear communication

Required

4+ years of experience in security engineering, anti-abuse, trust & safety, or fraud detection
Strong programming skills in Python and/or TypeScript for building detection systems and automation
Experience with SQL and data analysis at scale (BigQuery, Snowflake, or similar)
Experience building or fine-tuning ML/LLM-based classifiers for security or abuse detection
Familiarity with prompt injection, jailbreaking, and other LLM-specific attack vectors
Ability to investigate complex abuse patterns and translate findings into automated defenses
Familiarity with common attack patterns: phishing infrastructure, account takeover, credential stuffing, resource abuse
Clear communication skills for working across Security, Support, Legal, and Engineering teams

Preferred

Experience at a platform company dealing with user-generated content or compute abuse (hosting providers, cloud platforms, developer tools)
Background in fraud detection, payment abuse, or financial crime
Familiarity with device fingerprinting, IP reputation, and email validation services
Experience with CI/CD security tooling (SAST, SCA, Dependabot, Snyk)
Knowledge of container security, Linux internals, or cloud infrastructure (GCP preferred)
Prior work with abuse reporting pipelines, trust & safety tooling, or content moderation systems

Benefits

401(k) Program
Health, Dental, Vision and Life Insurance
Short Term and Long Term Disability
Paid Parental, Medical, Caregiver Leave
Commuter Benefits
Monthly Wellness Stipend
Autonoumous Work Environement
In Office Set-Up Reimbursement
Flexible Time Off (FTO) + Holidays
Quarterly Team Gatherings
In Office Amenities

Company

Replit

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Replit is the most secure agentic platform for production-ready apps.
dateFounded in 2016
location
Foster City, California, USA
people-size51-200 employees
web-link
https://replit.com

H1B Sponsorship

Replit has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (8)
2024 (5)
2023 (2)
2022 (2)

Funding

Current Stage
Growth Stage
Total Funding
$472.02M
Key Investors
Prysm CapitalCraft VenturesAndreessen Horowitz
2025-07-30Series C· $250M
2023-11-06Series B· $20M
2023-04-25Series B· $97.4M

Leadership Team

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Amjad Masad
CEO
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Faris Masad
CO-founder and Engineer

Recent News

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2026-01-09
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2026-01-05
Company data provided by crunchbase