# Senior Data Scientist (all genders) at JustPlay GmbH

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> Responsibilities: - Build, train, and optimize ML models for

- **Company:** JustPlay GmbH (https://jobs.trythestack.co/companies/justplay-gmbh)
- **Location:** Berlin, Germany
- **Work arrangement:** Remote
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Machine Learning, Statistical Analysis, Deep Learning, Python, SQL, A/B Testing, Product Analytics, User Acquisition Modeling, LTV Prediction, TensorFlow, PyTorch, AWS, GCP, Project Management, Looker, Ad Monetization
- **Posted by employer:** 2026-05-11
- **Added to The Stack:** 2026-05-12
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/justplay-gmbh/c7fe6358-052f-4259-a3d9-2b820d65bb1a (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-data-scientist-all-genders-justplay-gmbh

## About the role

Responsibilities:
- Build, train, and optimize ML models for user acquisition, LTV prediction, churn, segmentation, and ad monetization.
- Design and run A/B and multivariate tests; ensure statistical rigor and clear experiment analysis.
- Perform product analytics to identify growth opportunities and guide roadmap decisions.
- Deploy and monitor models in production; collaborate with engineering to ensure reliability and scalability.
- Translate analysis into actionable recommendations for marketing, product, and growth teams.
- Lead projects, mentor junior data scientists, and communicate results to stakeholders.

Requirements:
- 6+ years in data science with strong background in machine learning, statistical analysis, and (where relevant) deep learning.
- Proficiency in Python (Pandas, NumPy, scikit-learn, TensorFlow or PyTorch) and SQL for data querying and ETL.
- Solid experience designing and analyzing A/B tests and applying causal/statistical methods.
- Familiarity with cloud platforms (AWS or GCP) and model deployment practices.
- Experience with product analytics and translating metrics into product or growth actions.
- Nice-to-have: mobile gaming analytics, Looker or BI tooling, ad-tech/platform experience (Google Ads, Facebook), reinforcement learning exposure.

## Responsibilities

Drive growth by creating and optimizing User Acquisition models, LTV predictions, and Ad Monetization strategies. Lead A/B testing initiatives and conduct in-depth product analytics to shape the product roadmap.

## Requirements

Requires 6+ years of professional experience in data science with proficiency in Python, SQL, and machine learning frameworks. Expertise in user acquisition modeling and statistical methods, ideally within the mobile gaming industry, is expected.

## FAQ

- **Is this Senior Data Scientist (all genders) role still open?** It was posted on 2026-05-11. Listings more than 30 days old may no longer be active, so check JustPlay GmbH's site before applying.
- **Does JustPlay GmbH offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on JustPlay GmbH's site.
- **Where is this role located?** The listing gives the location as Berlin, Germany. It is marked remote.
- **What skills does this role ask for?** The listing names: Machine Learning, Statistical Analysis, Deep Learning, Python, SQL, A/B Testing, Product Analytics, User Acquisition Modeling, LTV Prediction, TensorFlow, PyTorch, AWS, GCP, Project Management, Looker, Ad Monetization.

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