Senior Machine Learning Engineer

Roku is seeking a senior machine learning engineer to develop and enhance intelligent systems for marketing and advertising applications. The role involves applying advanced machine learning techniques such as recommendations, reinforcement learning, and neural networks to improve customer targeting, campaign performance, and system optimisation. Candidates should have experience with productionised recommendation systems, real-time model scoring, and large-scale data analysis frameworks like Spark and Ray. A strong coding background in Python, Java, and familiarity with distributed machine learning frameworks are essential. The position requires working with diverse stakeholders across the company to build scalable, efficient AI-driven solutions. The ideal candidate maintains a curious, problem-solving mindset and adapts quickly to evolving business needs.