Senior ML Research Scientist – AI & Generative Recommendation (f/m/d)

The role

The Data Science Research team builds foundational ML representations and advanced AI capabilities to enhance Playtime and adjoe Ads. You will translate research into production-ready code and architect multi-stage recommendation pipelines using behavioral and transactional data.

What you will do

• Translate research into production-ready code optimized for sub-millisecond latency
• Architect multi-stage recommendation pipelines, Generative Retrieval, Deep Ranking, and Re-ranking
• Research and develop information-rich user and ad embeddings using unsupervised and generative approaches
• Lead architectural debates
• Mentor junior scientists
• Drive the team's research direction

Required qualifications

• PhD in CS, Statistics, Math, or Physics, or an MSc with extensive industry research
• Publications in top-tier venues like SIGIR, KDD, NeurIPS, or ICLR
• 4+ years building large-scale recommender systems in high-throughput environments such as AdTech, e-commerce, or social
• Experience distilling SOTA research into robust, production-ready code
• Deep expertise in PyTorch and large-scale model optimization
• Hands-on experience with high-concurrency optimization, model quantization, and distillation

Benefits

• Relocation support to Hamburg, Germany

About the company

adjoe builds the technologies behind mobile app growth and monetization. Their products, Playtime Arcade and adjoe Ads, run on 13% of the world's smartphones.