Senior Data Scientist (Open to relocate to Barcelona)

Would you like to be part of a dynamic, international environment full of opportunities?Our client, a fast-growing technology startup, is on a mission to accelerate the global success of mobile applications. Backed by a strong client portfolio of top-tier developers and publishers, the company operates from three strategic hubs: Spain, Poland, and the United States. As they continue to scale, they are now expanding their team in Barcelona and seeking motivated recent graduates eager to kick-start their careers and contribute to an ambitious, high-impact project.Join a vibrant Data Tech-Hub where you can keep growing and learning from a passionate team of Data Scientists, Data Analysts, and ML/Data Engineers who are ready to innovate and inspire!Main responsibilitiesUncover trends and insights by independently exploring complex datasets and resolving intricate data challenges.Build and deploy full-cycle data science solutions—from exploratory analysis to scalable, high-performing models—focused on improving ad targeting, bidding, and campaign results.Work closely with both business and technical stakeholders to turn requirements into impactful, data-driven strategies that boost advertising performance and ROI.Improve and fine-tune existing ML models and data pipelines within the ad-tech space, ensuring they remain efficient and aligned with a fast-moving market.Core skills/experience3+ years of experience in data science, preferably in a product-focused environment2+ years of experience in AdTech (or related field).Bachelor's or Master's degree in Computer Science, Statistics, Mathematics, Data Science, or a related field.Strong analytical skills with the ability to learn how to derive insights from datasets.Solid understanding of statistical modeling and machine learning fundamentals.Excellent communication and collaboration skills, with the ability to work effectively in a team environment.Tech Stack:Proficient in Python and SQLExperience with frameworks such as PySpark and PandasSkilled with cloud services (e.g., AWS)Hands-on experience in DNN model training libraries and frameworks (e.g., PyTorch, TensorFlow, Hydra, Comet)Experience in the AdTech industry is requiredWhat's on offerCompetitive salaryHybrid working model from Barcelona's Hub (relocation package is included)Comprehensive benefits packageOpportunities for professional development and growthFlexible work hours and vacation policyGreat opportunity to kick-start your career in Data ScienceOur recruitment process?Step 1: Interview with our Recruiter to get to know youStep 2: Interview with our client's HR TeamStep 3: Technical interviewStep 4: Interview with Hiring Manager