Staff Software Engineer (Anti-Abuse & Security)

TL;DR

Staff Software Engineer (Anti-Abuse & Security): Building and operating adversarial detection systems to protect an AI-native software platform with an accent on LLM guardrails and automated response mechanisms. Focus on detecting prompt injection, cryptomining, and phishing while leveraging AI as a defensive tool in production.

Location: Hybrid in Foster City, CA (In-office Monday, Wednesday, Friday)

Salary: $190,000 – $240,000 + Equity

Company

An agentic software creation platform that enables anyone to build applications using natural language, democratizing software development worldwide.

What you will do

• Design and implement LLM guardrails to detect abuse in AI-generated code and agent interactions.
• Build AI-powered detection systems to identify malicious patterns, classify threats, and automate response decisions.
• Operate systems to identify phishing, cryptomining, account takeover, and financial fraud across millions of daily actions.
• Own the full abuse response lifecycle: detection, investigation, enforcement, and handling appeals.
• Analyze attack patterns using BigQuery and Hex to develop new detection rules.
• Integrate and tune security scanners (SAST, SCA) within CI pipelines under tight performance SLAs.

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.
• Experience with SQL and large-scale data analysis (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.
• Must be based in or able to work from the Foster City, CA office (Hybrid: M, W, F).

Nice to have

• Experience at platform companies dealing with user-generated content or compute abuse.
• Background in fraud detection, payment abuse, or financial crime.
• Knowledge of container security, Linux internals, or cloud infrastructure (GCP preferred).
• Familiarity with device fingerprinting, IP reputation, and email validation services.

Culture & Benefits

• Competitive base salary and equity packages.
• 401(k) program with a 4% company match.
• Comprehensive Health, Dental, Vision, and Life Insurance.
• Flexible Time Off (FTO), holidays, and paid parental/medical leave.
• Monthly wellness stipend and in-office set-up reimbursement.
• Autonomous work environment with quarterly team gatherings.