> Markdown version of [/jobs/ext/1691331-data-scientist-ml-engineer](https://www.wearedevelopers.com/jobs/ext/1691331-data-scientist-ml-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Data Scientist / Ml Engineer - **Company:** All The Hires - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Cloud Engineering, Data Systems, Mobile Application Software, Python (Programming Language), Machine Learning, SQL Databases, Comet Programming, Pytorch, Pandas, Pyspark, Machine Learning Operations, Data Pipelines - **Published:** July 31, 2026 - **Apply:** https://www.buscojobs.com.es/data-scientist-ml-engineer-en-barcelona-ID-364163099 ## About the Role AdTech Expert: 2+ years of experience specifically within the ad?tech domain or a closely related field. Experienced Engineer: 3+ years of professional experience in data science, ideally within a product?focused company. Python & SQL Specialist: Highly proficient in Python and SQL, with hands?on experience using PySpark and Pandas. ML Practitioner: Proven track record of training DNN models using PyTorch and managing workflows with Hydra or Comet. Cloud Native: Comfortable working with AWS cloud services to deploy and manage data solutions. ## Description Our customer is a product company with a truly global presence, specializing in mobile app monetization. They provide a platform that helps developers grow their businesses through intelligent mediation and cutting?edge data tools, building history?defining solutions for the mobile industry.Location:Barcelona, SpainPosition:Data Scientist / ML EngineerType:Full?TimeWorkplace:On?SiteWhat You'll DriveOptimize Ad Efficiency: Design and deploy end?to?end models that directly improve ad targeting, bid strategies, and campaign ROI.Scale Intelligent Systems: Develop high?performance data science solutions from initial analysis through to production?ready deployment.Uncover Trends: Independently analyze massive datasets to identify patterns that drive business decisions and product innovation.Enhance Pipelines: Maintain and optimize existing ML models and data pipelines to ensure efficiency within the fast?moving ad?tech ecosystem.Bridge Tech and Business: Translate complex technical requirements into data?driven insights that non?technical stakeholders can act upon.Who You AreAdTech Expert: 2+ years of experience specifically within the ad?tech domain or a closely related field.Experienced Engineer: 3+ years of professional experience in data science, ideally within a product?focused company.Python & SQL Specialist: Highly proficient in Python and SQL, with hands?on experience using PySpark and Pandas.ML Practitioner: Proven track record of training DNN models using PyTorch and managing workflows with Hydra or Comet.Cloud Native: Comfortable working with AWS cloud services to deploy and manage data solutions.How You'll WorkYou will be an integral part of the Data Science team in Barcelona, working in a cross?functional environment alongside both technical and business teams. This role requires a balance of independent problem?solving and deep collaboration to ensure models align with dynamic market trends. You'll own projects from development to deployment and have the autonomy to own your work.What You'll GetCareer Growth: Professional development opportunities and a clear path for advancement within a fast?growing environment.Work?Life Balance: Flexible work arrangements and a culture that respects personal time.Relocation Support: Assistance with relocating to a vibrant hub in Barcelona.Impactful Projects: The chance to work on high?stakes ML projects that influence the global mobile ecosystem.#J-*****-Ljbffr ## Related Videos - [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data) - [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail) - [Photonic Computing: Programming a New Class of AI Accelerators (incl. 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