Roblox

Principal ML Engineer to architect the Reasoning Layer and design systems for AI agents to navigate a billion-line codebase. Focus on AI workload optimization, synthetic data generation, and agent evaluations. Requires expertise beyond basic fine-tuning, focusing on RLCF and Domain-Specific Distillation for code-specific optimization and continuous learning loops.

Roblox is seeking experienced machine learning researchers to innovate on LLMs, VLMs, and other large models for user understanding, content understanding, recommendation, and agentic search. The role involves designing and implementing ML solutions for agentic search and discovery systems, large-scale recommendation models, and LLMs/VLMs for visual and natural language understanding. The position requires a practical approach to integrate research into products and experience with transformer-based model training, inference, and product integration.

Principal ML Engineer focused on Embodied AI and Behavioral Agents for Roblox's 3D gaming platform. The role involves research and development of agents with human-like movement and strategic reasoning, leveraging Imitation Learning, Reinforcement Learning, Computer Vision, Computer Graphics, Robotics, and Agentic Reasoning. The goal is to create generalizable agents that can perceive 3D environments, understand game rules, plan long-term strategies, and execute complex physics-based actions, impacting millions of users in real-time gaming environments.

Director of Engineering for Studio Assistant at Roblox, focusing on evolving Roblox Studio into an AI-Native IDE by building and scaling agentic AI systems. The role involves owning technical direction, leading engineering teams, and driving alignment across various departments to deliver production-grade AI-powered creation tools.

Senior Machine Learning Engineer focused on building facial age estimation and real-time liveness checks for account identity and security. The role involves developing deepfake detection and 3D facial embeddings to combat fraud and identity spoofing, requiring expertise in computer vision and large-scale ML systems.

Senior Machine Learning Engineer on the Economy ML team at Roblox, responsible for building and iterating on deep learning models for ranking, recommendation, pricing, and content understanding across the platform's economic surfaces. This role involves owning the full ML lifecycle, from data exploration to production deployment, and designing experiments to optimize key business metrics. The engineer will also contribute to the team's technical direction and mentor other engineers.

Roblox is seeking a Principal Machine Learning Engineer to lead the technical vision for their Alternate Account Detection platform. This role involves architecting and building high-scale ML systems, specifically using Graph Neural Networks and advanced clustering techniques, to detect and prevent bad actors from rejoining the platform in near real-time. The engineer will also drive the ML roadmap, mentor other engineers, and focus on adversarial approaches to stay ahead of sophisticated actors.

Senior Machine Learning Engineer focused on Recommendation Systems at Roblox. The role involves designing and implementing large-scale recommendation systems using deep learning, generative AI, and LLMs for discovery across experiences, avatars, and creator content. It bridges research and production, impacting hundreds of millions of users.

Senior AI Platform Engineer focused on Agentic Systems, responsible for engineering and scaling foundational data infrastructure including Knowledge Graphs and Vector Databases to power AI applications. The role involves designing, developing, and operating these systems at massive scale, building APIs for integration into agentic and RAG applications, and researching advancements in VectorDB and Knowledge Graph technologies. The goal is to create a cutting-edge AI/ML platform for a large-scale consumer product.

Roblox is seeking a Principal Machine Learning Engineer for Safety AI Systems to define the technical strategy and execution roadmap for ML solutions in content and communication safety. This role involves leading a team, architecting large-scale systems for proactive moderation using LLMs and multimodal AI, and ensuring the safe deployment of innovative technologies to combat critical harms on the platform.

Distinguished Engineer/Technical Director to lead ML systems strategy and technical direction, focusing on large-scale recommendations, infrastructure, and Generative AI applications for Roblox's economy. The role involves building systems for retrieval, ranking, generative modeling, and LLM-powered personalization at massive scale, requiring deep systems thinking and hands-on ML expertise.

This role focuses on designing, prototyping, and scaling AI-augmented workflows for Trust & Safety Operations at Roblox. The Senior Analyst will translate operational pain points into AI workflows, partner with product and engineering, and build evaluation frameworks to ensure automations are safe, reliable, and measurable. The role involves using LLM agents, existing rules engines, and human review to improve efficiency and consistency, with a strong emphasis on analytical skills and cross-functional communication.

Principal Software Engineer on the Asset Safety team at Roblox, responsible for building and scaling distributed systems that power asset moderation for billions of user-generated assets. The role involves developing innovative detection approaches, scaling ML pipelines, and delivering end-to-end safety products in a rapidly evolving, adversarial landscape. This is a highly technical leadership role focused on ensuring safety and civility across various content types like images, avatars, and 3D content.

Senior Software Engineer to join the Customer Care team within the Trust & Safety organization, focusing on developing next-generation, AI-powered solutions at scale, including an LLM-backed chatbot, to revolutionize the user customer support experience.

Senior Engineering Manager for Search and Discovery ML team at Roblox, leading architects of exploration for one of the world's largest immersive platforms. Responsible for core algorithms connecting over 120 million daily active users with millions of 3D experiences, items, and social connections. This role directly determines the growth, retention, and satisfaction of the Roblox community, moving beyond traditional recommendation systems into multimodal, agentic, and generative discovery.

Head of User Growth role focused on building sophisticated AI-driven engines for user acquisition, activation, and retention in a large-scale consumer platform. The role involves architecting recommendation systems, understanding marketplace dynamics, and owning the end-to-end user lifecycle, particularly for aged-up audiences.

Senior Product Manager for AI Content & Communications Safety at Roblox. This role involves leading safety features that automate content reviews using AI across various modalities (image, text, audio, video, 3D, code). The focus is on combating malicious actors and ensuring platform safety and civility, particularly for a younger user base. The role requires experience in building and deploying large-scale, real-time AI solutions and understanding Trust & Safety dynamics in user-generated content environments.

Roblox is seeking an Engineering Manager for their Critical Harms team, focusing on identifying and addressing high-risk problems like predatory behavior, child endangerment, extremism, and fraud using machine learning and scalable systems. The role involves leading a team, shaping roadmaps, and partnering with various stakeholders to develop innovative safety solutions in a complex, adversarial environment.

Senior Product Designer to shape and scale the next generation of Roblox's internal data platform, focusing on AI-assisted workflows and LLM-powered interfaces for engineering teams. The role involves pioneering intuitive, self-service tools and agentic workflows to manage data analytics and ML environments, partnering with PMs and backend engineers to translate technical needs into elegant user experiences.

Senior Design Engineer on the Design Acceleration team, focused on building scalable systems, AI integrations, and custom tooling to empower designers and engineers. This role involves architecting backend services and APIs that connect design tools to AI models, developing agentic workflows for UI generation, building CI/CD pipelines for designers, and designing data architecture for design systems and AI data sources. The goal is to create internal tools, plugins, and web apps for design linting, code generation, and automated compliance, serving as a technical bridge between engineering, AI research, and product design.

This role focuses on transforming complex legalistic policy language into clear operational instructions for human moderators using AI, specifically LLMs. It involves advanced prompt engineering, few-shot learning, and rigorous testing of AI-generated content against ground truth data to ensure accuracy and enforceability. The goal is to move towards AI-assisted content scaling within Trust & Safety operations.

Principal AI/ML Engineer focused on leveraging ML to improve the reliability of the Roblox platform by detecting issues proactively and reducing incident resolution time. This involves building data pipelines, anomaly detection systems, reasoning layers for root cause analysis, and time-series models for capacity prediction.

Senior Engineering Manager for Roblox's Payments - Risk team, leading the vision and execution for core risk services that facilitate fiat monetary transactions. The role involves architecting and maintaining low-latency engines for real-time risk and fraud decisioning, building infrastructure for automated chargeback and dispute management using machine learning, developing systemic controls for AML and compliance, and owning data pipelines and simulation environments for risk models. This is a leadership role focused on protecting a multi-billion dollar economy and ensuring financial safety.

Senior Machine Learning Engineer at Roblox focused on building ML solutions for ad ranking and personalized advertising experiences. The role involves designing and implementing large-scale recommendation models and driving the development of an ML-driven advertising platform from its early stages. Experience with transformer models, training, and inference is a plus.