Senior Data Scientist (f/m/d)

Overview

adjoe is redefining the future of mobile ads. Powered by advanced AI, first-party data and world-class engineers, we’ve perfected the offerwall experience for monetizing and scaling app publishers with solutions like Playtime and Arcade. We drive incremental engagement, retention, and revenue, and we are expanding into programmatic advertising with the intelligent bidding system of adjoe Ads. This ecosystem connects app developers to over 600 million users worldwide for scalable growth, backed by a $100 million investment from Bertelsmann and offices in Hamburg, Boston, Singapore, and Tokyo. Join us.

Meet Your Team: Playtime Data Science

Playtime is a time- and event-based ad unit that rewards users with in-app currency for the time spent and events completed while playing mobile games. We connect advertisers to 200+ million Playtime users and serve 2 billion requests per day at low latency. Our data science team powers the engine that distributes our ads by developing algorithms to provide the most relevant ads, predicting user interests, and dynamically adjusting pricing based on predictions. We use deep learning models to serve the best ads to a diverse user base.

Within the Playtime team you will be responsible for services and models that provide automated solutions for our advertisers.

What you will do

• Build, maintain & develop new and existing models (classifications, recommendations, etc.).
• Dive into state-of-the-art algorithms and deep learning models to create recommendation systems, predict user behavior, optimize user retention, advertiser’s ROAS, and other dynamic values.
• Drill into data from various sources to generate insights and discuss them with colleagues.
• Act as an advocate for data-related topics in the company and become the go-to person in your area of expertise.

Who you are

• You have 5+ years of professional experience in the Data Science field.
• You have strong knowledge of Python, R, Scala, Julia or similar programming languages used in Data Science.
• You have experience drilling into large data from sources such as AWS Athena, Kafka, Spark, Flink, S3, MySQL.
• You have experience developing deep learning models in production with large traffic (>1 million predictions per day).
• You can explain complex topics clearly and have strong mathematical foundations.
• You are a strong team player who enjoys helping others.
• Plus: Tech & Infrastructure knowledge (Airflow, hosting and deploying models) and plus: Experience in the AdTech industry.

Benefits

• Invest in Your Future: Regular feedback and a development program to support growth.
• Easy Arrival to adjoe: Visa support, relocation assistance, and help settling in Hamburg.
• Live Your Best Life, at Work and Beyond: Hybrid setup with 3 core office days, flexible hours, 30 vacation days, remote work weeks, and access to an in-house gym and EAP.
• Thrive Where You Work: Alster lake view, modern office, open spaces, snacks and drinks.
• Join the Community! Regular team and company events, hackathons and social gatherings.

Location: Hamburg, Germany (hybrid) – local candidates are prioritized where applicable.