Staff/Senior Machine Learning Scientist (AdTech)

TL;DR

Staff/Senior Machine Learning Scientist (AdTech): Designing and productionizing state-of-the-art ML models for bidding, pricing, and personalized content delivery within a high-scale programmatic advertising platform with an accent on campaign efficiency and advertiser ROI. Focus on optimizing CTR prediction, recommendation systems, and discovering predictive patterns from large-scale auction data.

Location: Based in Tokyo, Japan (Visa sponsorship available for international candidates)

Company

hirify.global is an AI-native Agentic AI as a Service (AaaS) company that democratizes AI to power business decision-making.

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 that enhance bidding and personalization.
• Collaborate cross-functionally with engineering, product, and data teams to identify opportunities and deliver impactful solutions.
• Continuously improve system performance through offline experimentation and online A/B testing.

Requirements

• Bachelor's degree in Computer Science, Mathematics, EE, or related field (Master's or PhD preferred).
• 4+ years of industry experience in ad tech with a focus on performance optimization.
• Proven experience in applied machine learning, especially in CTR prediction and recommendation systems.
• Proficiency in Python and experience with modern ML frameworks such as PyTorch or TensorFlow.
• Strong ownership and ability to lead end-to-end projects across product, data, and engineering.

Nice to have

• Experience working on high-throughput, low-latency real-time systems such as RTB engines or stream inference.