Sr Machine Learning/AI Engineer

About the team

Roku pioneered streaming to the TV and continues to innovate and lead the industry. While we are well-positioned to help shape the future of television – including TV advertising – around the world, continued success relies on its investment in our machine learning capabilities. Roku offers millions of options to our users: movies, episodes, news, sports, and channels from all around the world. The Roku Content Platform is key to onboarding content into the Roku ecosystem, delighting our customers. Building a content knowledge platform that provides insights to downstream systems like Search, Recommendations, Ads, and Voice to shape customers' experiences is why we’re actively looking for a Senior Machine Learning / AI Engineer, Content Platform who can drive further innovation.

About the role 

The person in this role will leverage their technical skills, business intuition, and analytical thinking to build best-in-class machine learning products. This includes integrating Generative AI capabilities and Vision Models to enrich content quality and user engagement. Communication and presentation skills are essential as you'll collaborate across teams. The role requires high technical aptitude, problem-solving abilities, motivation, and exceptional attention to detail. We’re always in “build mode” because we’re a company of data-focused builders. Every day, you’ll look at what exists and find ways to make it better.

What you’ll be doing

• Building and owning the next generation of content knowledge platforms and other algorithms/systems that create high quality and unique experiences for millions of Roku users.
• Designing and implementing advanced Machine Learning models for entity matching, data deduplication, and Generative AI tasks such as content summarization. deduping and metadata quality.
• Researching and developing advanced AI algorithms, including Vision Models for visual content analysis, and enhancing the Content Knowledge Graph.
• Developing and maintaining Deep Learning models for data quality checks, visual similarity scoring, and content tagging.
• Implementing KPI measurement frameworks to evaluate the quality and performance of delivered models, including those utilizing Generative AI.
• Creating products that provide exceptional user experiences while meeting performance, security, quality, and stability requirements.

We’re excited if you have

• 7+ years of experience applying Machine Learning and GenAI to concrete problems at large-scale.
• Strong CS fundamentals, with the ability to design algorithms for real-world challenges.
• Expertise in machine learning fundamentals, including deep generative models (GANs, VAEs), transformers, tree-based methods, and sequence-based models.
• Proven familiarity with NLP approaches like BERT, GPT, or related architectures, as well as Vision-based approaches like ResNet, EfficientNet, or CLIP.
• Experience in big data systems (e.g., Spark, EMR, Kafka, S3, Flink, AirFlow) and programming (Java, Scala, or Python).
• A track record of building in-production Machine Learning systems, including deploying Generative AI and Vision Model-based pipelines.
• Knowledge of system architecture and experience with big data technologies (e.g., streaming architectures, scalable data pipelines).
• An understanding of state-of-the-art Vision Models for tasks such as image classification, object detection, and multimodal learning.
• MS in Computer Science, Statistics, or a related field is required; a Ph.D. in CS or related fields is preferred.

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