Senior Data Scientist

Jobgether SRL; France; Hybride; EUR 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Founders access

Career growth

Multinational team

WFH flexibility

Relocation to Berlin

Home-office budget

Learning budget

Résumé du poste

Jobgether SRL in France seeks a Senior Data Scientist to develop and improve machine learning products operating at global scale. You will work with large datasets and models processing billions of ad requests and users in real time.

You’ll collaborate with data scientists, analysts, and ML engineers to build scalable solutions that boost customer acquisition, retargeting, and advertising performance across a distributed platform.

Qualifications

• 5+ years of professional experience in data science or ML product development.
• Strong Python, Spark, Hadoop, Airflow, Docker, and SQL skills.
• Experience with large-scale sparse datasets and real-time inference.
• Proven collaboration with ML engineers, data scientists, and analysts.
• AdTech experience is required, including mobile app advertising.

Responsabilités

• Develop, enhance, and optimize ML models with new features and data sources.
• Collaborate with ML engineers to deploy scalable algorithms.
• Design A/B tests to measure impact and improve models.
• Build solutions for prediction, clustering, and outlier detection on large datasets.
• Translate business needs into practical ML solutions.

Connaissances

Python

Spark

Hadoop

Airflow

SQL

Docker

Reinforcement learning

AdTech

Model deployment

Outils

Docker

Airflow

SQL tooling

Description du poste

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Scientist based in France.

As a Senior Data Scientist, you’ll develop and improve machine learning products operating at exceptional global scale.
You’ll work with large, complex datasets and models that process billions of ad requests and users in real time.
The role spans the full data science lifecycle, from research and experimentation through production deployment and optimization.
You’ll collaborate closely with data scientists, analysts, and machine learning engineers to build scalable solutions with measurable business impact.
Your work will help optimize customer acquisition, retargeting, and advertising performance across a global technology platform.
You’ll have significant opportunities to experiment with new algorithms, data sources, and modeling approaches.
Joining a distributed, international team, you’ll contribute to a fast-moving environment focused on innovation, collaboration, and continuous learning.

• Develop, enhance, and optimize machine learning models by introducing new features, tuning parameters, and incorporating additional data sources.
• Collaborate with Machine Learning Engineers to research, develop, and deploy scalable supervised and unsupervised learning algorithms.
• Explore new and existing data sources to identify opportunities for improving model performance and creating new data-driven solutions.
• Research and evaluate innovative machine learning approaches that can optimize different stages of the product and advertising value chain.
• Design, run, and analyze A/B tests to validate hypotheses, measure impact, and continuously improve models and strategies.
• Develop solutions capable of handling sparse, high-volume datasets for use cases such as prediction, clustering, and outlier detection.
• Contribute to neural-network-based products supporting classification, regression, and multi-task learning.
• Build clean, reproducible, and well-tested code that can reliably move from research environments into production.
• Develop and improve monitoring tools and dashboards to track model and system performance.
• Work collaboratively with analysts, engineers, and other data scientists to translate business and product challenges into practical machine learning solutions.
• Apply an experimentation-driven, impact-focused approach, prioritizing simple and effective solutions over unnecessary complexity.

Requirements:

• At least 5 years of professional experience developing data science or machine learning products, from initial research through production deployment.
• Strong programming skills and a commitment to writing clean, maintainable, reproducible, and well-tested code.
• Strong hands-on experience with Python, Spark, Hadoop, Airflow, Docker, and SQL.
• Proven experience working with algorithms designed for sparse and large-scale datasets, including prediction, clustering, and outlier detection.
• Practical experience developing neural network-based solutions for classification, regression, multi-task learning, or related applications is highly valuable.
• Knowledge of reinforcement learning and large-scale optimization is a significant advantage.
• Good understanding of SQL and dashboards for developing, monitoring, and improving data science and machine learning systems.
• Strong communication and collaboration skills, with the ability to work effectively alongside data scientists, analysts, and engineering teams.
• A pragmatic, experimentation-oriented mindset and the ability to focus machine learning work on measurable product and business outcomes.
• Previous professional experience in AdTech is required, ideally including exposure to mobile app advertising technology.

Benefits:

• Direct collaboration with founders and the opportunity to make a meaningful impact on products and business direction.
• Strong opportunities for career development, learning, and professional growth.
• The chance to work alongside experienced industry specialists and entrepreneurs in a rapidly evolving technology sector.
• A diverse, multinational, and distributed team working across Europe, North America, Asia, and other regions.
• Flexible work-from-home arrangements.
• Opportunity to relocate to an international office in Berlin.
• $500 home-office setup budget.
• $1,000 annual learning and development budget.