Data Scientist (Demand Side Platform, Adtech)

About the position

Nexxen is seeking a self-directed, analytical, and curious Senior Data Scientist with over 5 years of hands-on experience to join our team. This role focuses on the core optimization and bidding logic of the Nexxen Demand-Side Platform (DSP). The successful candidate will work on problems at the intersection of machine learning, large-scale data processing, and ad delivery performance, directly impacting how we bid, win, and optimize impressions across real-time programmatic advertising exchanges. This position is based in the New York City office, following a hybrid schedule of three days in-office and two days remote.

Responsibilities

• Design, implement, evaluate and help deploy machine learning models for bidding, pacing and KPI prediction (Click, Action, Viewability etc.).
• Analyze large-scale behavioral and performance data using Spark (Scala/PySpark), SQL, and Python.
• Deep dive into complex, legacy codebases; comfortable navigating and improving existing systems.
• Collaborate with product managers, engineers, and other data scientists to define problems and deliver end-to-end solutions.
• Write clear, concise technical documentation and communicate insights effectively across both technical and non-technical stakeholders.

Requirements

• 2+ years of experience in a data science or applied machine learning role, ideally in a high-scale, real-time environment.
• Proficient with applied machine learning techniques (classification, regression, evaluation metrics, etc.), especially tree-based models like XGBoost.
• Comfortable navigating large, complex legacy codebases and proposing changes to production systems.
• Strong programming skills in Python and SQL.
• Experience with Scala/Apache Spark for distributed data processing and machine learning at scale.
• Strong written and verbal communication skills - able to synthesize technical findings into clear, actionable insights.
• Self-directed, curious, and able to thrive in a fast-paced and evolving industry.

Benefits

• Medical insurance
• Dental insurance
• Vision insurance
• Disability insurance
• 401(k)
• Employee Assistance Program (EAP)
• Parental leave
• Unlimited vacation
• Company-paid holidays