Principal Machine Learning Engineer (AI)

TL;DR

Principal Machine Learning Engineer (AI): Architecting and building industry-leading detection systems for alternate account prevention at massive scale with an accent on Graph Neural Networks and advanced clustering techniques. Focus on solving complex ground truth and training data challenges for adversarial use cases and ensuring real-time detection in high-throughput environments.

Location: **Hybrid** in **San Mateo, CA, United States**. Onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday.

Salary: $295,250–$345,040 USD

Company

hirify.global is building tools and a platform for millions to explore, create, play, learn, and connect in 3D immersive digital experiences.

What you will do

• Lead the technical vision for the alternate account detection platform, moving towards proactive, near real-time prevention.
• Architect high-scale ML systems using Graph Neural Networks (GNNs) and advanced clustering techniques.
• Solve complex ground truth and training data challenges for adversarial use cases.
• Build for low latency and massive scale, ensuring detection within minutes.
• Develop innovative adversarial approaches to stay ahead of sophisticated actors.
• Drive the ML roadmap, leveraging big data and behavioral signals to improve precision and recall.
• Mentor and up-level high-performing ML and software engineers.

Requirements

• MS or PhD degree in Computer Science, Machine Learning, or a related field.
• 10+ years of industry experience in Applied ML, with a significant focus on anti-abuse, fraud, integrity, or identity.
• Deep expertise in Graph Learning, including Large-scale GNNs and unsupervised/semi-supervised clustering at billions of nodes.
• Proven track record of leading complex technical projects from conception to production-level deployment.
• Experience with high-throughput systems and deploying ML models in low-latency environments.
• Possess an adversarial mindset to anticipate and defend against evolving threats.

Culture & Benefits

• Shape the future of human interaction and solve unique technical challenges at scale.
• Contribute to creating safer, more civil shared experiences for everyone.
• Foster a culture of technical excellence and rapid iteration within a high-performing team.
• Work with an adaptable, analytical, user-oriented, team-oriented, and mission-oriented approach.
• Eligible for equity compensation and a comprehensive benefits package.