Roblox Corporation is hiring: [2026] Senior Machine Learning Engineer, Natural L
Roblox Corporation, San Mateo, CA, United States
[2026] Senior Machine Learning Engineer, Natural Language Processing - PhD Early Career San Mateo, CA, United States
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.
Natural Language Processing (NLP) is central to enabling massive-scale communication, creation, and safety across the Roblox platform. This role offers the unique opportunity to build and deploy cutting-edge NLP, speech, and generative AI models that operate at an unprecedented scale, impacting hundreds of millions of daily users.
You will solve an extremely diverse range of high-scale language-related problems—from real-time moderation of voice and text to automatically localizing experiences and empowering users through LLM-driven creation tools . We combine cutting-edge research with large-scale engineering to bridge experimentation and production, designing algorithms that shape the next generation of language services for our immersive, user-generated content platform.
Teams Hiring for This Role Safety AI Systems: Dedicated to building end-to-end ML systems for maintaining civility and safety across the platform, operating at massive scale. This includes: Real-time Moderation: Building world-class NLP and speech models for real-time moderation of voice and text (processing over 6 billion messages daily) and advanced interventions that measurably improve user civility.
Critical Harms & Advanced Detection: Developing specialized LLM agents, behavioral analysis, and graph systems for detecting and preventing rare, high-risk scenarios (e.g., child safety, terrorism), requiring adversarial thinking and multi-step reasoning.
Safety Data Quality: Ensuring all Safety AI systems are robust by managing the core data infrastructure, MLOps, and Active Learning initiatives for continuous model improvement.
You Will Design and implement deep learning-based NLP and speech solutions that address problems across Roblox, from creation to safety.
Develop advanced models, including Large Language Models (LLMs), machine translation, and generative AI , for user interactions, content creation, and moderation.
Have the independence and end-to-end responsibility to develop NLP/ML-based services that are scalable and resilient.
Be a technical bar-raiser for cutting-edge ML technology, high code quality, and architectural designs.
Work backward from user and product needs to deliver ML solutions that drive engagement, safety, and ecosystem growth.
You Have Possessing or pursuing a Ph.D. in Computer Science, Computer Engineering, Mathematics, Statistics, or a related technical field, with a thesis aligned to Roblox’s research areas.
Expertise in one or more areas: NLP, Speech Models, Large Language Models, Machine Translation, or Generative AI (including diffusion models).
Experience with transformer-based model design, training, serving, and product integration.
A strong research track record, evidenced by multiple publications and presentations in top-tier, peer-reviewed venues (e.g., ACL, EMNLP, Interspeech, ICML, NeurIPS).
Proficiency in one or more programming languages (e.g., Python, C++, Go, Java) and experience building and optimizing large-scale systems.
You may redact age, date of birth, and dates of attendance/graduation from your resume if you prefer.
As you apply, you can find more information about our process by signing up for Speak_. You'll gain access to our practice assessment, comprehensive guides, FAQs, and modules designed to help you ace the hiring process.
Annual Salary Range
$195,780 — $242,100 USD
Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).
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.
#J-18808-Ljbffr
In Summary: Natural Language Processing is central to enabling massive-scale communication, creation, and safety across the Roblox platform . This role offers the unique opportunity to build and deploy cutting-edge NLP, speech, and generative AI models that operate at an unprecedented scale, impacting hundreds of millions of daily users .
En Español: Cada día, decenas de millones de personas vienen a Roblox para explorar, crear, jugar, aprender y conectarse con amigos en experiencias digitales inmersivas 3D creadas por nuestra comunidad global de desarrolladores y creadores. En Roblox estamos construyendo las herramientas y plataformas que permitan a nuestra comunidad dar vida a cualquier experiencia que puedan imaginar. Combinamos investigación de vanguardia con ingeniería a gran escala para unir la experimentación y la producción, diseñando algoritmos que dan forma a la próxima generación de servicios lingüísticos para nuestra plataforma de contenido inmersivo generado por el usuario. Equipos contratados para este papel Seguridad Sistemas AI: Dedicados a construir sistemas ML extremo a extremo para mantener la civilidad y seguridad en toda la plataforma, operando a una escala masiva. Esto incluye: Moderación en tiempo real: Construir modelos de NLP y habla de clase mundial para la moderación en tempo real de voz y texto (procesando más de 6 mil millones de mensajes diarios) e intervenciones avanzadas que mejoran de manera mensurable la civilidad del usuario. Perjuicios críticos & Detección Avanzada: Desarrollar agentes especializados LLM, análisis conductual y sistemas gráficos para detectar y prevenir escenarios raros y de alto riesgo (por ejemplo, seguridad infantil, terrorismo), que requieren pensamiento adversario y razonamiento multidimensional. Calidad de datos de Seguridad: Asegurar que todos los sistemas de IA de seguridad sean sólidos mediante la gestión de la infraestructura de datos básicos, MLOps y iniciativas de aprendizaje activo para mejorar continuamente el modelo. Diseñará e implementará soluciones basadas en aprendizaje profundo y lenguaje que aborden problemas a través de Robots, desde la creación hasta la seguridad. En Ciencias de la Computación, Ingeniería Informática, Matemáticas, Estadística o un campo técnico relacionado, con una tesis alineada a las áreas de investigación de Roblox. Experiencia en uno o más ámbitos: PNL, Modelos de habla, Grandes modelos de lenguaje, Traducción automática o IA generativa (incluidos los modelos de difusión). Obtendrá acceso a nuestra evaluación de prácticas, guías completas, preguntas frecuentes y módulos diseñados para ayudarlo en el proceso de contratación. Rango salarial anual $195,780 $242,100 USD Los roles que se basan en una oficina están presentes el martes, miércoles y jueves, con presencia opcional los lunes y viernes (a menos que se indique lo contrario). Roblox proporciona igualdad de oportunidades de empleo a todos los empleados y solicitantes de empleo y prohíbe la discriminación y acoso de cualquier tipo sin importar raza, color, religión, sexo, origen nacional, estado de discapacidad, genética, estatus protegido del veterano, orientación sexual, identidad o expresión de género u otra característica protegida por las leyes federales, estatales o locales.
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.
Natural Language Processing (NLP) is central to enabling massive-scale communication, creation, and safety across the Roblox platform. This role offers the unique opportunity to build and deploy cutting-edge NLP, speech, and generative AI models that operate at an unprecedented scale, impacting hundreds of millions of daily users.
You will solve an extremely diverse range of high-scale language-related problems—from real-time moderation of voice and text to automatically localizing experiences and empowering users through LLM-driven creation tools . We combine cutting-edge research with large-scale engineering to bridge experimentation and production, designing algorithms that shape the next generation of language services for our immersive, user-generated content platform.
Teams Hiring for This Role Safety AI Systems: Dedicated to building end-to-end ML systems for maintaining civility and safety across the platform, operating at massive scale. This includes: Real-time Moderation: Building world-class NLP and speech models for real-time moderation of voice and text (processing over 6 billion messages daily) and advanced interventions that measurably improve user civility.
Critical Harms & Advanced Detection: Developing specialized LLM agents, behavioral analysis, and graph systems for detecting and preventing rare, high-risk scenarios (e.g., child safety, terrorism), requiring adversarial thinking and multi-step reasoning.
Safety Data Quality: Ensuring all Safety AI systems are robust by managing the core data infrastructure, MLOps, and Active Learning initiatives for continuous model improvement.
You Will Design and implement deep learning-based NLP and speech solutions that address problems across Roblox, from creation to safety.
Develop advanced models, including Large Language Models (LLMs), machine translation, and generative AI , for user interactions, content creation, and moderation.
Have the independence and end-to-end responsibility to develop NLP/ML-based services that are scalable and resilient.
Be a technical bar-raiser for cutting-edge ML technology, high code quality, and architectural designs.
Work backward from user and product needs to deliver ML solutions that drive engagement, safety, and ecosystem growth.
You Have Possessing or pursuing a Ph.D. in Computer Science, Computer Engineering, Mathematics, Statistics, or a related technical field, with a thesis aligned to Roblox’s research areas.
Expertise in one or more areas: NLP, Speech Models, Large Language Models, Machine Translation, or Generative AI (including diffusion models).
Experience with transformer-based model design, training, serving, and product integration.
A strong research track record, evidenced by multiple publications and presentations in top-tier, peer-reviewed venues (e.g., ACL, EMNLP, Interspeech, ICML, NeurIPS).
Proficiency in one or more programming languages (e.g., Python, C++, Go, Java) and experience building and optimizing large-scale systems.
You may redact age, date of birth, and dates of attendance/graduation from your resume if you prefer.
As you apply, you can find more information about our process by signing up for Speak_. You'll gain access to our practice assessment, comprehensive guides, FAQs, and modules designed to help you ace the hiring process.
Annual Salary Range
$195,780 — $242,100 USD
Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).
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.
#J-18808-Ljbffr
In Summary: Natural Language Processing is central to enabling massive-scale communication, creation, and safety across the Roblox platform . This role offers the unique opportunity to build and deploy cutting-edge NLP, speech, and generative AI models that operate at an unprecedented scale, impacting hundreds of millions of daily users .
En Español: Cada día, decenas de millones de personas vienen a Roblox para explorar, crear, jugar, aprender y conectarse con amigos en experiencias digitales inmersivas 3D creadas por nuestra comunidad global de desarrolladores y creadores. En Roblox estamos construyendo las herramientas y plataformas que permitan a nuestra comunidad dar vida a cualquier experiencia que puedan imaginar. Combinamos investigación de vanguardia con ingeniería a gran escala para unir la experimentación y la producción, diseñando algoritmos que dan forma a la próxima generación de servicios lingüísticos para nuestra plataforma de contenido inmersivo generado por el usuario. Equipos contratados para este papel Seguridad Sistemas AI: Dedicados a construir sistemas ML extremo a extremo para mantener la civilidad y seguridad en toda la plataforma, operando a una escala masiva. Esto incluye: Moderación en tiempo real: Construir modelos de NLP y habla de clase mundial para la moderación en tempo real de voz y texto (procesando más de 6 mil millones de mensajes diarios) e intervenciones avanzadas que mejoran de manera mensurable la civilidad del usuario. Perjuicios críticos & Detección Avanzada: Desarrollar agentes especializados LLM, análisis conductual y sistemas gráficos para detectar y prevenir escenarios raros y de alto riesgo (por ejemplo, seguridad infantil, terrorismo), que requieren pensamiento adversario y razonamiento multidimensional. Calidad de datos de Seguridad: Asegurar que todos los sistemas de IA de seguridad sean sólidos mediante la gestión de la infraestructura de datos básicos, MLOps y iniciativas de aprendizaje activo para mejorar continuamente el modelo. Diseñará e implementará soluciones basadas en aprendizaje profundo y lenguaje que aborden problemas a través de Robots, desde la creación hasta la seguridad. En Ciencias de la Computación, Ingeniería Informática, Matemáticas, Estadística o un campo técnico relacionado, con una tesis alineada a las áreas de investigación de Roblox. Experiencia en uno o más ámbitos: PNL, Modelos de habla, Grandes modelos de lenguaje, Traducción automática o IA generativa (incluidos los modelos de difusión). Obtendrá acceso a nuestra evaluación de prácticas, guías completas, preguntas frecuentes y módulos diseñados para ayudarlo en el proceso de contratación. Rango salarial anual $195,780 $242,100 USD Los roles que se basan en una oficina están presentes el martes, miércoles y jueves, con presencia opcional los lunes y viernes (a menos que se indique lo contrario). Roblox proporciona igualdad de oportunidades de empleo a todos los empleados y solicitantes de empleo y prohíbe la discriminación y acoso de cualquier tipo sin importar raza, color, religión, sexo, origen nacional, estado de discapacidad, genética, estatus protegido del veterano, orientación sexual, identidad o expresión de género u otra característica protegida por las leyes federales, estatales o locales.