Senior Software Security Engineer

GitLab is an intelligent orchestration platform for DevSecOps. The Senior Software Security Engineer will engineer product security improvements, maintain abuse detection and prevention systems for GitLab’s SaaS platforms, and identify abuse patterns using automation, anomaly detection, and AI. The role also involves collaborating with engineering teams, resolving automation gaps, and documenting operational procedures.

Responsibilities:

• Maintain core abuse prevention systems and build new abuse detection rules to identify and prevent evolving platform abuse such as spam, AI/token, SEO optimization/redirects and other financially motivated abuse campaigns
• Become a core maintainer for our in-house abuse platform (Ruby on Rails monolith) and be comfortable supporting and building new features for the platform
• Improve and expand agentic AI capabilities in our abuse mitigation tools, including improving multi agent reasoning decision patterns with a target to reduce HITL operational load
• Lead collaboration with peer engineering teams to deliver safety improvements for the GitLab product
• Resolve automation gaps and create efficient, automated processes
• Create and maintain documentation such as runbooks and procedures

Requirements:

• A strong software engineering background with experience in large Ruby/Rails codebases is required.
• • Strong software development skills with experience in Ruby/Rails
• • Passion/desire to proactivity develop security engineering skills
• • Comfortable working in an all remote environment where results and impact matter above hours worked
• • Strong experience with cloud native development (Google Cloud Platform (GCP) and/or AWS)
• • Interest in “thinking like a hacker” and defending against attacks with an “automation first” mindset
• • Interest in handling trust and safety security incidents and collaborating with engineering to harden platform defenses to combat abuse campaigns
• • Experience working on an AI native development team maintaining teams of agents and acting as a code reviewer and experience abstracting your role away from writing code for most cases
• • Experience working on distributed applications with large codebases and deployed in cloud environments strongly preferred