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Senior Data Scientist

Justtrack

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Location:
Germany, Hamburg

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

As a Senior Data Science you will join a team of highly committed analysts, data engineers and developers and form our data science team. At justtrack, we build a SaaS business that provides app and game publishers an attractive toolset to handle their entire global marketing growth process. Starting from managing, analyzing, and automating marketing processes, justtrack enables gathering deep mobile product insights. As part of the Applike Group (financially backed by media powerhouse Bertelsmann), justtrack has access to industry experts and funding with a long-term growth mindset. You will join our small but growing Data Science team where you will have access to state of the art technology and work closely with all business stakeholders to implement new approaches on how to leverage our data assets with new algorithms and ideas. Our team’s mission is to effortlessly gather, aggregate, and instantly provide all in-app event and marketing data to developers and marketers. Your exploratory data analysis will help us make the data speak by transforming recurring analyses into metrics and alerts.

Job Responsibility:

  • Drive the development of our data science tech stack by looking for innovative opportunities and steering the implementation by our development team
  • Hand in hand with our developers you transform recurring analyses into metrics, charts, business related messages and the underlying data storage and pipelines
  • You will work on ML models to notify our users about detected trends and statistical outliers in real-time
  • You extract knowledge and actionable insights from noisy, structured and unstructured data
  • You perform exploratory data analysis to determine correlations and trends
  • You drill into data from various sources (Redshift, Spark, SQL, Athena, S3, Druid event streams, AWS data pipeline)

Requirements:

  • 5+ years of experience in applying Data Science, ML and time series analysis in real-life tasks where the projects had measurable business value
  • Master’s degree in Data Science/Applied Mathematics or a related field
  • Expert knowledge of Python, SQL, ML frameworks like scikit-learn and know the AWS tech stack well
  • You have an entrepreneurial and hacker mindset, when there is a tough problem it motivates you to drill deeper
  • You easily switch between move-fast- and no-margin-for-error-modes
  • You are able to dive deep into math and explain complex topics in an easy way
What we offer:
  • Regular feedback and our development program support your growth
  • We support visa
  • relocation bonus
  • hybrid setup with 3 core office days, plus flexible working hours
  • 30 vacation days
  • 3 weeks of remote work per year
  • free access to an in-house gym with lots of different fitness classes
  • mental health support through our Employee Assistance Program (EAP)
  • central office with top-notch equipment, fun open spaces, and a large variety of snacks and drinks
  • Participate in regular team and company events, including hackathons and social gatherings

Additional Information:

Job Posted:
December 09, 2025

Employment Type:
Fulltime
Work Type:
Hybrid work
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