Job Overview
Location
Foster City, CA
Job Type
Full-time
Category
Software Engineering
Date Posted
May 28, 2026
Full Job Description
đź“‹ Description
- • As a Staff Software Engineer on the Risk team at Replit, you will serve as the front line defending the platform from exploitation by detecting and shutting down phishing deployments, preventing cryptomining on free-tier infrastructure, stopping LLM token farming, and keeping bad actors from weaponizing the platform against users.
- • Day to day, you will design and implement LLM guardrails for AI-generated code, build AI-powered detection systems using LLMs to identify malicious patterns, operate abuse detection systems for phishing and financial fraud, design automated response mechanisms, own the full abuse response lifecycle, analyze attack patterns using BigQuery and Hex, maintain internal detection tools like Slurper and Netwatch, integrate security scanners in CI pipelines, and track abuse trends to adapt defenses.
- • You will join Replit’s Risk team, which operates at the intersection of security and AI-native platforms, working to protect millions of users by building adaptive defenses against evolving abuse patterns in a unique environment where AI-generated code introduces novel attack vectors.
- • In this role, you will gain hands-on experience applying AI to security problems in production, deepen expertise in LLM-based abuse detection, influence platform-wide safety policies, and lead cross-functional efforts with Support, Legal, and Engineering to protect users at scale.
🎯 Requirements
- • 8+ 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
🏖️ Benefits
- • Competitive Salary & Equity
- • 401(k) Program with a 4% match (US Only)
- • Health, Dental, Vision and Life Insurance
- • Short Term and Long Term Disability
- • Paid Parental, Medical, Caregiver Leave
- • Flexible Time Off (FTO) + Holidays
- • Commuter Benefits (In-Office Only)
- • Monthly Wellness Stipend
- • Autonomous Work Environment
- • In Office Set-Up Reimbursement (In-Office Only)
- • Quarterly Team Gatherings
- • In Office Amenities (In-Office Only)
Skills & Technologies
About Replit, Inc.
Replit is an online, collaborative, integrated development environment (IDE) that allows users to write, run, and share code in numerous programming languages directly from their web browser. It provides a cloud-based platform, eliminating the need for local setup and dependencies. Replit supports real-time collaboration, enabling multiple users to code together simultaneously on the same project, making it ideal for educational purposes, team projects, and rapid prototyping. The platform offers a vast array of features including version control integration, package management, and deployment tools, democratizing software development for beginners and experienced programmers alike.
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