# Staff Software Engineer, Fraud

**Company**: Replit
**Location**: Foster City, CA
**Work arrangement**: hybrid
**Experience**: staff
**Job type**: Full time
**Salary**: $250K - $315K
**Category**: Engineering
**Industry**: Technology
**Wikidata**: https://www.wikidata.org/wiki/Q60768699

**Apply**: https://jobs.ashbyhq.com/replit/27618f18-d516-42c0-a321-592f18606431?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_8235bb57-1cb

## Description

We are seeking a Staff Software Engineer to join our Fraud team. As a Staff Software Engineer, you will design and implement LLM guardrails that detect abuse scenarios in AI-generated code and agent interactions. You will also build AI-powered detection systems that use LLMs to identify malicious patterns, classify threats, and automate response decisions.

Our Fraud team is the front line defending Replit's platform from exploitation. We detect and shut down phishing deployments, prevent cryptomining on free-tier infrastructure, stop LLM token farming, and keep bad actors from weaponizing the platform against our users.

This is a full-time role that can be held from our Foster City, CA office. The role has an in-office requirement of Monday, Wednesday, and Friday.

As a Staff Software Engineer, you will own problems end-to-end, from identifying emerging abuse patterns to shipping the systems that stop them at scale. You will work closely with our Support, Legal, and cross-functional teams to ensure that our abuse response lifecycle is effective and efficient.

We are looking for someone with 8+ years of experience in security engineering, anti-abuse, trust & safety, or fraud detection. You should have strong programming skills in Python and/or TypeScript for building detection systems and automation. Experience with SQL and data analysis at scale is also required.

Nice to have:

- Experience at a platform company dealing with user-generated content or compute abuse

- 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

We offer a competitive salary and equity, as well as a range of benefits including health, dental, and vision insurance, 401(k) program, and flexible time off.

If you are passionate about building secure and scalable systems, and want to join a team that is dedicated to making programming more accessible around the world, please apply!

## Skills

### Required
- Python
- TypeScript
- SQL
- Data analysis
- Security engineering
- Anti-abuse
- Trust & safety
- Fraud detection

### Nice to have
- Device fingerprinting
- IP reputation
- Email validation services
- CI/CD security tooling
- Container security
- Linux internals
- Cloud infrastructure

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Source: [Apply at jobs.ashbyhq.com](https://jobs.ashbyhq.com/replit/27618f18-d516-42c0-a321-592f18606431?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)