Senior Data Scientist (f/m/d) at adjoe

✨ The Stack take on this adjoe job

• 🏢 adjoe has 15 jobs here, 15 with visa sponsorship see all
• 🛂 Visa: EU Blue Card. Minimum salary: €50,700 a year guide
• 💡 No salary shown. Ask adjoe if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Design and refine relevance models to improve targeting, engagement and revenue.
- Develop and optimize bidding policies using Bayesian methods, reinforcement learning and other optimisation techniques.
- Build meta-learning frameworks and personalization models that adapt from user interactions.
- Lead rigorous A/B testing and experimentation to validate model changes and measure KPI impact.
- Harden successful experiments into scalable production solutions using the company ML stack (Python, Kubernetes, Airflow, MLFlow, Trino).
- Collaborate with engineers and product teams to ensure models are production-ready and maintainable.
- Share knowledge, participate in architecture discussions and mentor junior team members.

Requirements:
- 4+ years professional experience in data science within AdTech, mobile gaming, e‑commerce or similar.
- Proven track record architecting and deploying large-scale recommender systems and neural-network models.
- Strong Python and SQL skills and familiarity with ML deployment tooling (Kubernetes, Airflow, MLFlow, Trino) preferred.
- Experience with A/B testing, experiment design and statistical analysis.
- Good engineering mindset: reproducibility, monitoring, and scalable data pipelines.
- Ability to translate research ideas into production-grade solutions and work closely with cross-functional teams.

Responsibilities

Architect and refine relevance models and bidding policies to optimize ad performance and user engagement. Take end-to-end ownership of models within a modern ML stack, bridging the gap between experimentation and scalable production.

Requirements

Requires 4+ years of professional data science experience in AdTech, mobile gaming, or e-commerce. Must be proficient in Python, SQL, and the deployment of large-scale recommender systems and neural networks.

Key skills

• Machine Learning — in 291 other listings on The Stack
• Python — in 1200 other listings on The Stack
• SQL — in 545 other listings on The Stack
• Real-time Bidding — in 3 other listings on The Stack
• Recommender Systems — in 4 other listings on The Stack
• Neural Networks — in 6 other listings on The Stack
• Bayesian Methods — in 6 other listings on The Stack
• Reinforcement Learning — in 22 other listings on The Stack
• A/B Testing
• Kubernetes
• AWS
• Airflow
• MLFlow
• Trino
• Meta-Learning
• Data Science

On The Stack (as of 2026-11-05)

• adjoe has 14 other listings on The Stack, 14 of them marked as offering visa sponsorship.
• 166 visa-sponsored jobs in Germany on The Stack, posted in the last 60 days.
• 68 visa-sponsored data scientist jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about adjoe

Is this Senior Data Scientist (f/m/d) role still open?

It was posted on 2026-05-29. Listings more than 30 days old may no longer be active, so check adjoe's site before applying.

Does adjoe offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on adjoe's site.

Where is this role located?

The listing gives the location as Hamburg, Germany. It is marked remote.

What skills does this role ask for?

The listing names: Machine Learning, Python, SQL, Real-time Bidding, Recommender Systems, Neural Networks, Bayesian Methods, Reinforcement Learning, A/B Testing, Kubernetes, AWS, Airflow, MLFlow, Trino, Meta-Learning, Data Science.