[2026] Senior Machine Learning Engineer, Account Identity - PhD Early Career

Safety

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.

Why Account Identity?

At Roblox, our mission is to keep the platform secure by establishing a deep understanding of our users. As a Senior Machine Learning Engineer within the Account Identity team, you will be instrumental in developing our in-house Facial Age Estimation product and centralizing age assurance controls.

Responsibilities

• Develop cutting-edge defenses against complex fraud and identity spoofing, such as deepfake detection and facial representation systems, utilizing modern architectures like Vision-Language Models (VLMs) and multimodal learning.
• Build high-precision facial age estimation and real-time liveness checks that form the critical foundation of a safe, trusted platform for users.

Requirements

• Possessing or pursuing a PhD in computer science, engineering, or a related field, with a thesis aligned to Roblox’s research areas.
• Expertise in one or more areas: computer vision, multimodal learning, deepfake detection, facial representation, adversarial machine learning, or VLM/LLM.
• Strong coding skills with proficiency in one or more programming languages and experience with building large-scale systems.
• Experience working with large-scale data logs and tools like Spark and SQL to extract meaningful behavioral features.
• The ability to build and productionize end-to-end ML development life cycles, including data engineering and scoring algorithms.

Qualifications

• You are resourceful: You're adaptable in any situation and can always find a path forward in the face of evolving threats.
• You are analytical: Excited to investigate large, ambiguous datasets to find the "signal in the noise" of billions of accounts.
• You are user oriented: You understand that safety measures must be balanced with a seamless experience for our legitimate community members.
• You are team oriented: You are a sought-after mentor who lifts up your peers and builds a collaborative, high-performance environment.
• You are mission oriented: You are laser-focused on keeping Roblox safe and are willing to take bold, strategic risks to achieve a billion-user scale safely.

Benefits

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 to candidates with qualifying disabilities or religious beliefs during the recruiting process.

Pay

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 as described on this page.

Schedule

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).