Senior Data Scientist - AdTech

What if your insights could directly shape how millions of ads reach their audience every day?

Our client is a rapidly scaling, global tech company redefining mobile app monetization through advanced data science and advertising intelligence. With a strong international footprint across Spain, Poland, and the United States, and a fully distributed team worldwide, they foster a culture built on diversity, collaboration, and technical excellence.

As part of their growth in Barcelona, they are looking for an experienced Data Scientist to turn complex data into actionable insights, optimize advertising performance, and contribute to high-impact projects in a dynamic ad-tech environment.

Main responsibilities

• Explore and analyze large and complex datasets to identify trends, patterns, and actionable insights, working independently on challenging data problems.
• Design, build, and deploy end-to-end data science solutions, from early analysis and model development to production, ensuring scalability and high performance.
• Develop and refine machine learning models focused on advertising use cases, including ad targeting optimization, bidding strategies, and campaign performance evaluation.
• Partner with product, engineering, and business teams to translate commercial and technical needs into effective, data-driven solutions that improve advertising impact and ROI.
• Maintain, monitor, and enhance data pipelines and machine learning systems, particularly within ad-tech environments, adapting them to changing market dynamics.
• Work with modern data and ML tooling, including Python and SQL, data processing frameworks such as PySpark and Pandas, and cloud-based infrastructures.

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• Leverage ETL and analytics platforms like Dagster and Druid or equivalent technologies, as well as ML frameworks such as PyTorch and related tooling; experience with Databricks is considered a plus.

Core skills/experience

• Bachelor’s or Master’s degree in Computer Science, Statistics, Mathematics, or a related technical field.
• 5+ years of professional experience in data science, ideally within product-driven or data-intensive organizations.
• At least 3 years of hands-on experience working in the AdTech domain or with advertising-related data and platforms.
• Strong analytical and problem-solving skills, with the ability to extract insights from complex and high-volume datasets.
• Solid background in statistical analysis and machine learning techniques, including the training and evaluation of advanced models.
• Excellent communication and collaboration skills, with proven experience working in cross-functional, multidisciplinary teams.

What's on offer

• Competitive salary
• Hybrid working model from Barcelona's Hub (relocation package is included)
• Comprehensive benefits package
• Opportunities for professional development and growth
• Flexible work hours and vacation policy
• Great opportunity to kick-start your career in Data Science

Our recruitment process?

• Step 1: Interview with our Recruiter to get to know you
• Step 2: Interview with our client's HR Team
• Step 3: Take-home test
• Step 4: Technical interview
• Step 5: In-Depth Technical Interview