Senior Software Engineer (Business Applications and Machine Learning)

About the role Roku Advertising powers a multi-billion-dollar business and operates at the scale of one of the largest CTV advertising platforms in the US. We are looking for a Senior Software Engineer to drive the next evolution of how Roku’s advertising business applications operate, partnering closely with advertising business stakeholders, product, architecture, and engineering teams to transform operational workflows using machine learning, GenAI, and agentic AI systems. This role is focused on applying AI across Roku’s advertising business applications, including pre‑sales, booking, campaign management, delivery, optimization, and revenue operations. You will build intelligent systems and agents that recommend, automate, orchestrate, and optimize decisions across complex operational workflows and interconnected business applications. We are looking for someone who combines strong software engineering and architectural fundamentals with practical experience building and scaling AI‑native systems in production environments. The ideal candidate has experience building large‑scale enterprise business applications and operational systems in traditional software engineering environments and has more recently applied GenAI, LLMs, and agentic AI systems to modernize and automate complex workflows. This is not a research‑only role. You will own production‑grade AI and agentic systems that create measurable business impact, influence architecture and technical direction for AI‑native operations, and help shape how AI capabilities are embedded across Roku’s advertising business applications. For New York Only – The estimated annual salary for this position is between $195,500 – $352,100 annually. Compensation packages are based on factors unique to each candidate, including but not limited to skill set, certifications, and specific geographical location. This role is eligible for health insurance, equity awards, life insurance, disability benefits, parental leave, wellness benefits, and paid time off. What you’ll be doing Drive the AI‑native transformation of Roku’s advertising business applications, identifying high‑leverage opportunities and contributing to roadmap, architecture, and system design across multiple teams. Work closely with advertising business stakeholders to identify operational challenges, simplify complex workflows, and translate business pain points into scalable AI and agentic system solutions. Design and deliver production‑grade AI systems end‑to‑end, including recommendation, ranking, forecasting, anomaly detection, workflow automation, and multi‑agent or agent‑to‑agent orchestration embedded directly within operational platforms and business applications. Apply GenAI and LLM technologies where they create measurable value, including RAG pipelines, prompt orchestration, evaluation frameworks, memory‑aware systems, and guardrails, with a focus on reliability, scalability, and operational outcomes over hype. Partner deeply with engineers, data scientists, product managers, architects, and business teams to translate ambiguous operational problems into practical production solutions that drive measurable business impact. Build evaluation and observability frameworks covering precision and recall, calibration, drift detection, human‑in‑the‑loop systems, operational metrics, dashboards, and SLOs that connect AI system performance to business outcomes. Start from the needs of internal engineers and business operators, bringing a creative and strategic approach to simplifying systems and introducing pragmatic, high‑impact solutions. Provide technical leadership within the broader AI and engineering ecosystem, influencing architecture, mentoring engineers, and helping establish engineering best practices for AI‑native application development. We're excited if you have Master’s or PhD in Computer Science, Mathematics, Statistics, or a related technical field, or equivalent practical experience. 8+ years of hands‑on software engineering experience building and scaling large enterprise business applications and operational platforms, with recent experience applying AI, GenAI, and agentic systems within production enterprise environments. Proven experience building and scaling production AI systems, including LLMs, RAG architectures, embeddings, retrieval systems, workflow orchestration, and multi‑agent or agent‑based architectures. Strong foundation in machine learning and statistical modeling techniques, including classification, regression, clustering, anomaly detection, ranking, forecasting, recommendation systems, and NLP use cases. Deep understanding of machine learning fundamentals, including feature engineering, model evaluation, bias‑variance tradeoffs, offline vs. online metrics, and production monitoring. Strong software engineering, architecture, and system design skills, with experience building reliable, scalable, and maintainable enterprise business applications, workflow‑driven systems, and operational platforms. Demonstrated technical leadership, including influencing architecture and technical direction across teams, mentoring engineers, and driving execution in ambiguous environments. Experience in advertising, marketplaces, e‑commerce, travel, or similar operationally complex, data‑rich platforms is a strong plus. Benefits Roku offers a comprehensive benefits package, including health insurance, life insurance, disability benefits, parental leave, wellness benefits, paid time off, and equity awards. Benefits may vary by location; you can consult your recruiter for details specific to your region. Accommodations Roku welcomes applicants of all backgrounds and provides reasonable accommodations and adjustments in accordance with applicable law. If you require reasonable accommodation at any point in the hiring process, please direct your inquiries to View email address on click.appcast.io. #J-18808-Ljbffr