Roblox

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 NLP, Speech, and Generative AI models for a large-scale consumer platform. The role involves designing, developing, and deploying deep learning solutions for user interactions, content creation, and safety, with end-to-end responsibility. Requires a PhD and a strong research publication record.

Roblox is seeking a Senior Machine Learning Engineer with a PhD to work on multimodal AI, focusing on computer vision and graphics. The role involves building and deploying foundation models for content understanding, creation, search, recommendations, and safety systems. This includes developing models for visual and 3D content, facial age estimation, and fraud detection, with a strong emphasis on applied research and production impact.

Roblox is seeking a Principal Model Optimization Engineer to optimize machine learning models for performance on GPU architectures, focusing on both training and inference workflows. This role involves low-level performance profiling, contributing to best practices and tooling, and collaborating with cross-functional teams to integrate optimized models into production. The ideal candidate has significant experience debugging GPUs and is proficient in advanced tools like CUDA, Triton, and TensorRT, with expertise in LLM optimization techniques such as speculative decoding and quantization.

Senior Machine Learning Engineer focused on advancing Roblox Assistant and Code Assist, involving fine-tuning LLMs, improving reasoning capabilities, and developing quality signals for script generation. The role requires expertise in ML frameworks, distributed data processing, and deploying ML systems to production.

Senior Data Scientist on the Creator Services team at Roblox, focusing on Machine Intelligence. This role involves bridging engineering infrastructure and ML applications, transforming unstructured data (text, images, video) into actionable insights and user-facing products. The position is a "zero-to-one" environment, requiring the creation of new data formats and analytical frameworks to drive creator success and platform sustainability through ML. Responsibilities include leading ML-driven transformation, modeling unstructured data, owning data workflows end-to-end, designing causal frameworks for experiments, and translating technical wins into business value.

Senior Software Engineer, ML Infra at Roblox, focusing on advancing large-scale AI systems for text safety. The role involves building intelligent tools for curating training and evaluation data, refining model performance for risk mitigation, and establishing best practices for safety AI. Requires experience in designing, building, and deploying ML systems, with a focus on data and systems orientation, collaboration, and impact.

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.

Principal ML Engineer focused on Content Safety at Roblox, defining and leading the technical strategy and execution for large-scale ML systems to proactively detect and mitigate violative UGC content. The role involves end-to-end product development, including data construction, auto-labeling pipelines, and shipping solutions, with a significant portion of time (30-40%) dedicated to backend and integration work. Requires expertise in Computer Vision and/or Vision-Language Models, scalable ML inference services, and robust data pipelines.

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 Data Scientist role focused on Generative AI at Roblox, specifically on developing evaluation frameworks and automated systems for GenAI features and internal AI Agents. The role involves running experiments, defining success metrics, and driving strategy related to AI safety, quality, and efficiency for both end-users and developers. It requires strong data science skills, experimentation, causal inference, and familiarity with GenAI evaluation methods.

Senior Machine Learning Engineer on the AI Platform team at Roblox, focusing on building cutting-edge systems for AI at scale. The role involves pioneering next-generation AI tooling, building core platform components like Serving Layer, Model Registry, and Pipeline Orchestrator, and designing great developer experiences to enhance efficiency, cost, and usability of ML. The position supports billions of inferences daily and aims to establish Roblox as the standard for 3D foundational models.

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.

Senior Machine Learning Engineer focused on implementing ML solutions for safety-related systems at Roblox. The role involves crafting and building large-scale ML models, including multi-modal embedding models for similarity detection, and managing the full ML lifecycle from training to deployment and monitoring. Experience in safety, integrity, or content moderation domains, and large-scale content understanding (text, image, video) is required.

Principal Machine Learning Engineer focused on Safety Experience at Roblox, building end-to-end ML systems for similarity detection and Computer Vision classification, driving the evolution of safety systems, and shaping the team's roadmap. Requires significant experience in designing and launching production computer vision models.

Senior ML Engineer focused on deploying and optimizing Generative AI models for on-device, low-compute environments within Roblox's platform. This role involves developing ML models, establishing deployment pipelines, and optimizing architecture for various computing devices.

Distinguished Machine Learning Engineer/Technical Director in the Safety organization at Roblox, responsible for driving the technical vision and execution of ML initiatives for user safety and civility. This role involves leading the creation and deployment of large-scale ML models, mentoring engineers, and collaborating with cross-functional teams to ensure a safe and inclusive platform.

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.

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 Data Scientist role focused on developing and improving Roblox's Alt Detection system, which involves large-scale identity modeling on a massive graph. The role requires defining, measuring, and enhancing detection systems by integrating diverse signals, calibrating thresholds, identifying new behavioral/network/biometric signals, designing processing systems, leading cross-functional integration, conducting research on alt creation incentives, and communicating insights to leadership. The work is critical for safety, systemic growth, and creator incentives.

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.

Senior/Principal Data Scientist to lead ML solutions and ranking frameworks for Roblox's discovery canvases (Home, Search, Matchmaking, Notifications), focusing on long-term ecosystem health and user retention in a large-scale UGC content platform and two-sided marketplace.

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 the AI Platform, Data team at Roblox. Will lead the development of the high-leverage data platform used by AI engineers, machine learning scientists, and product developers. Responsible for defining the long-term vision, strategy, and execution for the data foundation that powers the next generation of AI-driven products, including work on vector databases and knowledge graphs for advanced AI use cases. The role involves leading and growing a team, defining roadmaps, driving architectural decisions, and overseeing the development lifecycle.

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 Software Engineer for Roblox's Creator Trust team, focusing on building and enhancing ML models for computer vision and similarity detection to ensure creator safety and trust on the platform. The role involves contributing to technical direction, driving cross-functional outcomes, and owning projects from concept to deployment within a large-scale distributed backend systems environment.

Senior Machine Learning Engineer focused on real-time engine optimization for Roblox's platform. The role involves analyzing massive-scale telemetry, designing ML models for predictive resource allocation and content delivery, building adaptive control systems, and integrating ML solutions into the core gameplay engine. The goal is to replace heuristic logic with data-driven decision-making to improve stability, visual quality, and responsiveness across billions of global play sessions.

Roblox is seeking a Principal Data Scientist to focus on content safety and moderation. This role involves establishing and monitoring prevalence measurement methodologies, developing ground truth datasets for harmful content, conducting exploratory analysis on threat landscapes, designing and analyzing experiments for safety features, and leveraging causal inference to measure effectiveness. The scientist will collaborate with Product, Engineering, Legal, Policy, and Compliance teams, and partner with ML and Data Engineering teams to ensure statistically sound frameworks. The ideal candidate has extensive experience in data science, scripting languages, big data tools, and a background in safety or moderation systems for content platforms.

Roblox is seeking senior data scientists with expertise in machine learning to join their Discovery Experience team. The role focuses on improving end-to-end consumer journeys on Roblox by leveraging data science toolkits including analytics, experimentation, forecasting, and ML solutions. Responsibilities include developing ML solutions for discovery canvases, applying causal inference, and designing/implementing experiments. Experience with recommendation systems and content platforms is required.

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.

Senior Machine Learning Infrastructure Engineer for Roblox Ads, focusing on building and scaling ML infrastructure for training, data pipelines, feature engineering, and inference to serve performance ads to millions of users.

Senior/Principal AI Data and Feature Platform Engineer at Roblox, focusing on building and scaling the ML infrastructure, training data platforms, and feature stores to power AI applications across the Roblox ecosystem. This role involves designing and implementing systems for batch and real-time feature computation, storage, and serving, as well as large-scale data pipelines and feature engineering frameworks.

Principal Frontend Engineer for Roblox's Co-Experience team, focusing on real-time communication features (chat, voice, video) for millions of users. The role involves technical leadership, system design, and hands-on coding to build and scale social interaction platforms, enabling creators to add rich social features. Experience with consumer real-time audio/video calling and AI-assisted development tools is required.

This role focuses on developing and supporting core data science models and production pipelines, with a specific emphasis on building platform solutions for time series forecasting, anomaly detection, experimentation, and causal inference. The goal is to empower other data science teams and drive data-informed decision-making across the Roblox ecosystem.

Engineering Manager for Home Infrastructure at Roblox, leading a team responsible for the backend and data systems powering the Homepage and Experience Details Page. The role involves defining technical strategy, driving execution on large-scale systems for content discovery, personalization, ranking, and data, and partnering with ML, Data Science, and other product teams. The focus is on building and operating high-traffic, consumer-facing production systems with high reliability and performance.

Senior Security Software Engineer focused on Application Security at Roblox. This role involves designing, building, and shipping security solutions that integrate into developer workflows and platforms, scaling security through automation, CI/CD integrations, and secure libraries. Key responsibilities include embedding security across the SDLC, threat modeling, code review, penetration testing, and developing systemic solutions. The role also involves designing and implementing security controls for agentic and AI-assisted workflows, building guardrails against risks like prompt injection and data exfiltration.

Software Engineer on the Communication Safety team at Roblox, focusing on detecting and mitigating unsafe communication at massive scale. The role involves working at the intersection of backend infrastructure and machine learning, ensuring safety systems are accurate, performant, and reliable. Key responsibilities include designing and coding features for the core safety platform, improving pipeline performance, and collaborating with product and partner teams. Experience with ML model lifecycle, specifically model serving, experimentation, and performance monitoring, is required.

Senior Software Engineer to work on Roblox Studio, the IDE for creating experiences on the Roblox platform. The role involves architecting application frameworks, windowing systems, and code generation, with a focus on "AI Native" features and complex, agentic use cases. Experience with C++, UI frameworks, and a passion for improving code quality through AI are required.