Staff/Senior Machine Learning Scientist (Ad Cloud) - Tokyo,Japan

The role

You will design, implement, and productionize state-of-the-art ML models to improve campaign outcomes. You will analyze large-scale user and auction data to enhance bidding and personalization.

What you will do

• Design, implement, and productionize state-of-the-art ML models to improve campaign outcomes.
• Analyze large-scale user and auction data to discover predictive patterns and alpha signals.
• Collaborate cross-functionally with engineering, product, and data teams.
• Improve system performance through offline experimentation and online testing.

Required qualifications

• Bachelor's degree in Computer Science, Mathematics, EE, or related field
• 4+ years of industry experience in ad tech, with a focus on performance optimization
• Proven experience in applied machine learning, especially in CTR prediction, recommendation systems
• Proficiency in Python
• Experience with modern ML frameworks (PyTorch, TensorFlow, etc.)
• Strong ownership and collaboration skills

Nice to have

• Master's or PhD
• Experience working on high-throughput, low-latency real-time systems (e.g., RTB engines, stream inference)

Before you apply

• Open to overseas candidates
• Appier's Japan office provides visa sponsorship to international candidates

About the company

Appier is an AI-native Agentic AI as a Service (AaaS) company that uses artificial intelligence to power business decision-making. It is listed on the Tokyo Stock Exchange.