Senior Machine Learning Engineer - Fraud & Optimization

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. 

At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. 

A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.

Roblox is a high-growth, unique product environment. You will be developing anti-fraud and abuse solutions for web, mobile, and 3D environments, as well as personalizing the experience of our payments funnel.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 & Optimization?

As an Economy Fraud & Optimization engineer, you defend Roblox from all types of fraud, including purchasing and selling virtual items, and payment fraud. Additionally, you will play a key role in optimizing the payments funnel, identifying friction points, and implementing strategies to improve conversion rates and personalize the user experience.

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 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:

• Build, deploy, maintain and monitor high-scale ML solutions while working closely with product engineers and infra engineers.
• Implement models, improve infrastructure, build visualizations, perform data analysis, forecast fraud scenarios, and assist fraud investigations.
• Optimize and personalize the payments funnel to reduce friction, improve conversion rates, and tune toward user preferences.
• Collaborate with generalist backend engineers, data scientists, product, and operations.
• Build and deliver complex technical projects from the planning stage through execution.
• Ensure that our systems are scalable, reliable, and extensible.

You Have:

• 5+ years of professional experience building and working on end-to-end ML systems, including data analysis, ML modeling and data pipelines.
• Domain experience in fraud, abuse, risk, security, or trust & safety is a plus, but not required.
• Passion for delivering products end-to-end, from ideation through implementation and A/B testing, while being empathetic with cross-functional stakeholders.
• Ownership mindset with proactive, candid communication.
• Bachelor's Degree or above in computer science, engineering, mathematics, machine learning, or some other quantitative field.

For roles that are based at our headquarters in San Mateo, CA: The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits.

Annual Salary Range$238,520—$289,460 USD

Roles that are based in our San Mateo, CA Headquarters are in-office Tuesday, Wednesday, and Thursday, with optional in-office on Monday and Friday (unless otherwise noted).

You’ll Love: 

• Industry-leading compensation package
• Excellent medical, dental, and vision coverage
• A rewarding 401k program
• Flexible vacation policy (varies by exemption status)
• Roflex - Flexible and supportive work policy 
• Roblox Admin badge for your avatar
• At Roblox HQ: 
• Free catered lunches five times a week and several fully stocked kitchens with unlimited snacks
• Onsite fitness center and fitness program credit
• Annual CalTrain Go Pass

Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Roblox also provides reasonable accommodations for all candidates during the interview process.