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Senior ML Research Scientist – AI & Generative Recommendation

adjoe • Germany
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AI Summary

Build foundational ML representations and advanced AI capabilities for adjoe's Playtime and adjoe Ads products. Translate SOTA research into production-ready multi-stage recommendation pipelines, generative retrieval, and deep ranking systems. Requires a PhD or equivalent research depth, 4+ years building large-scale recommender systems, and deep PyTorch expertise.

Key Highlights
PhD or equivalent research depth with publications in top-tier venues
4+ years building large-scale recommender systems in high-throughput environments
Deep PyTorch expertise with model optimization, quantization, and distillation
Architect multi-stage recommendation pipelines and generative retrieval systems
Relocation support to Hamburg, Germany with visa assistance

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Key Responsibilities
Translate SOTA research into robust, 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, and drive the team’s research direction

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Technical Skills Required
PyTorch Machine Learning Deep Learning

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Benefits & Perks
competitive salary
quarterly team adventures
monthly feasts on the company
up to €7000 for referred friends
discounted city commute
extensive visa & relocation support
convenient hybrid work model
continuous investments in your development
generous vacation days
mental health & wellness benefits

Job Description

adjoe builds the technologies behind mobile app growth and monetization, challenging the status quo of adtech by redefining how apps acquire users and generate revenue. Our two products, Playtime Arcade and adjoe Ads, sit at opposite ends of the mobile advertising spectrum: rewarded engagement and programmatic in-app advertising. Together they run on 13% of the world’s smartphones, connecting advertisers, publishers, and hundreds of millions of users, with one goal: making mobile advertising work better for everyone in the ecosystem.

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Job Overview
Posted Nov 06, 2026
Employment Full-time
Experience Mid-Senior level
Location Germany
Category Data Science
Company adjoe
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