Senior Software Engineer, Machine Learning

Roku is building a world‑class voice system that is used by millions of Roku users. The Roku Voice team is looking for ambitious, experienced machine learning engineers with a background in one or more of the following areas: artificial intelligence, natural language understanding, machine learning, automated speech recognition, conversational systems, and building large‑scale production systems. You have a once‑in‑a‑lifetime opportunity to contribute to building the very core of the Roku Voice product and be part of a world‑class team.

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• Strong programming background with hands‑on experience building large‑scale production systems
  
• Strong algorithmic background and passion for intellectual challenges and solving complex problems
  
• Experience working across teams and pulling in the best talent from the organization to achieve your goals
  
• Ability to contribute new ideas and evaluate multiple solutions with peers before settling on a specific solution
  
• Self‑driven, willing, and able to take complete ownership of initiatives and make pragmatic technical decisions
  
• Experience working with big data systems (Spark, EMR, S3, Airflow) and programming languages (Java, Python, or C++)
  
• Good understanding of machine learning fundamentals such as regression, classification, ranking, neural networks, and sequence models for text/speech
  
• Hands‑on experience building challenging production systems
  
• Strong CS fundamentals, with the ability to write algorithms with ease
  
• Familiarity and experience deploying and maintaining machine learning models (transformer‑based models in production is a plus), including identifying the right KPIs and objective functions
  
• Experience with advanced machine learning techniques, including LLM and generative AI
  
• Experience building in‑production NLU and/or ASR systems
  
• Bachelor's degree required
  
• MS in Computer Science or a Ph.D. in CS or related fields is preferred