Roblox is hiring a
Principal Machine Learning Engineer - Economy Fraud

Roblox is a high-growth, unique product environment. Reporting to the Economy Fraud Engineering Lead, you will develop anti-fraud and abuse solutions for web, mobile, and 3D environments. This high impact work and your innovation is critical for the well-being of our community and to the future of our company. We aim for our users to have peace of mind that their communities and transactions are protected. Our defenses also protect our company's rapid expansion and safeguard billions in revenue. Roblox's virtual marketplace handles over 4 million transactions a day, and enables our top developers to make millions of dollars a year.

Why Economy Fraud?

As an Economy Fraud engineer, you defend Roblox from all types of fraud, including purchasing and selling virtual items, real-time bidding of advertising slots, and payment fraud.

Our team's challenges are not just regular day-to-day technical challenges. Fraud and abuse approaches need to shift over time, depending on the current behaviors of fraudsters. As an Economy Fraud ML engineer, you will be in a data-driven environment developing both classical and novel approaches to detect and prevent this bad behavior.

You Will:

• Shape team strategy and contribute to our technical roadmap.
• Implement models, improve infrastructure, build visualizations, perform data analysis, forecast fraud scenarios, and assist fraud investigations.
• Build, deploy, maintain and monitor high-scale ML solutions while working closely with product engineers and infra engineers.
• Bridge communication between generalist backend engineers, data scientists, product, and operations.
• Build and deliver complex technical projects from the planning stage through execution.
• Mentor junior engineers and help build out a world class ML team.
• Ensure that our systems are scalable, reliable, and extensible.

You Have:

• 7+ years of professional experience building and working on end-to-end ML systems, including data analysis, ML modeling and data pipelines.
• 2+ years of experience leading the technical direction of a medium-sized team.
• Domain experience in fraud, abuse, risk, security, or trust & safety.
• Experience delivering products end-to-end, from ideation through implementation and A/B testing, while being empathetic with cross-functional stakeholders.
• Ability to think through system interactions and fraudster behaviors.
• Bachelor's Degree or above in computer science, engineering, mathematics, machine learning, (computational) physics, statistics, or another quantitative field.

You Are:

• A Technical Leader: You have initiated and facilitated challenging technical solutions. Your technical expertise influences product direction.
• Versatile: You have a breadth and depth of expertise, and you are comfortable with several languages and technologies already; you are fungible in any situation. You can execute on goals, and take a creative and strategic approach to solving hard problems.
• Analytical: Excited to investigate large, ambiguous problems, and measure the problems and the solutions.
• User Oriented: You always start with the needs of the user, whether they are Roblox users or internal engineers before architecting a solution.
• Team Oriented: You lift up your peers and find ways to make the team stronger.