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Barcelona
538Joppy
Barcelona, ES
Data Scientist | €48K - €54K
Joppy · Barcelona, ES
. Python TSQL Azure Cloud Coumputing AWS Machine Learning Tableau
Una de las empresas con las que colaboramos en Joppy busca un/a Data Scientist para unirse al equipo.
Modalidad de trabajo: HÍBRIDA en Barcelona (1 dia/semana en oficina).
¿Te interesaría seguir desarrollándote como Data Scientist en un entorno tecnológico de alto rendimiento, participando en proyectos complejos e innovadores en el sector transporte?
Buscamos un/a INGENIERO/A de CIENCIA DEL DATO para incorporarse a nuestra área de Data. Formarás parte de un equipo ubicado en Barcelona. Trabajarás en la creación de soluciones avanzadas basadas en analítica, modelos estadísticos y aprendizaje automático para diferentes unidades de negocio.
¿Cuáles serán tus funciones principales?
• Recolectar grandes volúmenes de datos no estructurados y estructurados desde archivos, bases de datos, APIs, etc., y transformarlos en un formato más comprensible.
• Realizar análisis exploratorios para entender la naturaleza y distribución de los datos, identificar patrones, correlaciones y visualizarlos de manera efectiva.
• Desarrollar y aplicar modelos predictivos, de optimización y estadísticos para resolver problemas de negocio específicos, como regresión, clasificación, clustering, series temporales, etc.
• Aplicar técnicas de estadística y Machine Learning para desarrollar modelos predictivos y generar insights accionables para las diferentes áreas de negocio.
• Evaluar y validar la precisión y el rendimiento de dichos modelos utilizando técnicas como la validación cruzada, conjuntos de prueba y métricas de desempeño adecuadas.
• Colaborar con el equipo de MLOps para integrar los modelos desarrollados en un entorno de producción.
• Trabajar en estrecha colaboración con equipos interdisciplinarios como ingenieros de datos, analistas, expertos en el dominio y equipos de negocio para comprender los requisitos y objetivos del proyecto.
• Participar en la toma y definición de requisitos, identificando las necesidades de negocio y traduciendo problemas de negocio en casos de uso y soluciones analíticas.
• Comunicar de manera efectiva los análisis, resultados de los modelos e implicaciones a diferentes audiencias, incluyendo stakeholders no técnicos, a través de informes, presentaciones y visualizaciones comprensibles. El objetivo será facilitar la toma de decisiones basada en datos.
• Monitorizar el rendimiento de los modelos en producción, realizar mantenimientos periódicos y actualizarlos cuando sea necesario para garantizar su vigencia y precisión.
• Mantenerse actualizado en técnicas analíticas como machine learning, optimización, deep learning y análisis de texto.
Para ello, ¿qué vas a necesitar?
• Education: Grado, Máster o Doctorado en Informática, Economía, ADE, Ciencia de Datos o un campo relacionado.
• Más de 3 años de experiencia en Data Science, con experiencia en almacenamiento de datos, procesos ETL e integración de datos. Se valorará especialmente experiencia trabajando de forma autónoma en proyectos de estadística y Machine Learning.
• Conocimiento avanzado de SQL: dominio en la escritura y optimización de consultas.
• Experiencia en desarrollo en entornos AWS, Azure o Google Cloud.
• Conocimiento profundo del modelado de datos, gobernanza y mejores prácticas de calidad.
• Capacidad para manipular y preprocesar grandes volúmenes de datos utilizando herramientas como SQL, Pandas o Polars.
• Experiencia en scripts de Python y familiaridad con bibliotecas y herramientas de Python.
• Experiencia práctica en técnicas de Machine Learning y estadística aplicada, incluyendo modelos predictivos, regresión, clasificación, clustering y/o series temporales.
• Se valorará tener conocimientos estadísticos: pruebas de hipótesis, análisis de regresión, distribuciones de probabilidad, etc.
• Se valorará dominio de librerías de visualización como Matplotlib, Seaborn, ggplot2, etc., para crear visualizaciones claras e informativas (Tableau es un plus).
• Experiencia en toma de requisitos, interlocución con stakeholders y comunicación de resultados analíticos a perfiles de negocio.
• Se valorará positivamente experiencia en áreas de negocio como Comercial, Ventas, Controlling u otras funciones donde el análisis de datos tenga impacto directo en la toma de decisiones.
¿Qué te ofrecemos?
• Estabilidad desde el primer día, con contratación indefinida.
• Salario acorde a la experiencia aportada (entre 48.000 - 54.000 euros brutos anuales).
• Horario flexible y un día de presencialidad por semana.
• Cheque Formación para desarrollarte en las áreas profesionales que más te interesen.
• Seguro médico privado.
• Retribución flexible aplicable a seguro médico, restaurante, transporte, guardería y formación.
• Plan de pensiones con aportación empresarial complementaria.
• App de bienestar con acceso a gimnasios, actividades deportivas y profesionales especializados a precios reducidos.
• Eventos, afterworks y actividades solidarias para desconectar, compartir y conocer al equipo.
Staff Data Scientist
15 oct.Preply
Barcelona, ES
Staff Data Scientist
Preply · Barcelona, ES
. Python TSQL Power BI Tableau
We power people’s progress.
At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.
We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.
Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.
Meet the team!
At Preply, data is at the heart of every decision we make. We run hundreds of A/B tests to continually optimize our product, each with its own analytical and tracking challenges. The complexity of our subscription model, along with the unique dynamics of tutor-learner interactions, offers an exciting opportunity for those looking to make a real impact.
As a Staff Data Scientist , you will own the data strategy for a critical product domain (e.g., Growth, Retention, Marketplace) and act as the senior analytical authority in that space. You will partner with Directors and VPs across Product, Engineering, and Business to shape long-term strategy, influence investment decisions, and ensure our roadmap is grounded in rigorous, scalable measurement frameworks.
Our Data Team is dedicated to empowering top-quality decision-making. Do you want to know how? Visit our Tech Radar to learn about the technologies we use at Preply!
What you’ll be doing:
- Develop and formalize a strategic understanding of the key value drivers of your domain, including user behavior, marketplace dynamics, pricing, and long-term unit economics - and translate these into actionable decision frameworks used by leadership.
- Define the long-term measurement and experimentation strategy for your domain, identifying structural growth levers and step-change opportunities beyond incremental optimization.
- Design the experimentation programme in your domain and execute, and evaluate large-scale experiments to test new ideas and measure their effectiveness in driving business outcomes.
- Lead deep analytical investigations into customer behavior and retention dynamics, reframing ambiguous business questions into structured analyses that drive step-change improvements in long-term value.
- Own impact modeling and scenario analysis for major product initiatives, enabling quarterly and annual planning decisions through robust forecasting, trade-off analysis, and risk assessment.
- Own the definition and governance of key metrics within your domain, ensuring clarity, consistency, and alignment with company-level objectives.
- Act as a senior thought partner to product, engineering, and data leaders, driving alignment across teams and elevating analytical standards across the organization.
- Lead cross-domain analytical initiatives (e.g., company-wide LTV modeling, pricing strategy, marketplace health framework).
- Demonstrated track record of materially influencing product or business strategy in complex environments, with clear examples of company-level impact.
- Expertise in experimentation and causal inference, including operating under imperfect conditions, resolving ambiguity, and guiding high-stakes decisions where clean experiments are not always feasible.
- Strong understanding of subscription and marketplace economics, including LTV modeling, cohort dynamics, retention mechanics, pricing trade-offs, and long-term value optimization.
- Strong technical proficiency (e.g., SQL, Python) with the ability to review and elevate the analytical work of others, set coding standards, and design scalable analytical workflows.
- Experience mentoring and technically guiding senior data scientists, contributing to the overall growth and maturity of the data organization.
- Curiosity, problem-solving and critical-thinking skills, as well as the ability to proactively identify and address challenges.
- Ability to influence Directors and VP-level stakeholders, navigate conflicting incentives, and drive clarity in high-stakes strategic discussions.
- Interest in the bigger picture, feeling excited to impact the product roadmap and strategy.
- Background in 2-sided marketplaces or digital businesses (B2C, B2B2C).
- Experience with product analytics tools (e.g. Amplitude, Mixpanel, Heap).
- Experience applying advanced analytical methods (e.g., forecasting, causal modeling, pricing optimization) to drive structural business improvements.
- Familiarity with data visualization tools (e.g., Tableau, Looker, Power BI).
- Master's degree or PhD in a quantitative field.
- Demonstrated experience developing Senior Data Scientists and contributing to raising the analytical bar across teams.
- An open, collaborative, dynamic and diverse culture;
- A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
- A competitive financial package with equity, leave allowance and health insurance;
- Access to free mental health support platforms;
- The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)
- Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
- We do it for learners - For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
- Keep perfecting - To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
- Now is the time - In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
- Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
- Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
- Growth mindset - We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. We humbly embrace feedback and learn from setbacks.
- Raise the bar - We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
- Challenge, disagree and commit - We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.
- One Preply - We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other's progress.
Preply.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.
Barcelona Supercomputing Center
Barcelona, ES
Researcher - AI data scientist (R2) - AI4S
Barcelona Supercomputing Center · Barcelona, ES
. Python REST LESS
Job Reference
436_26_CASE_DPPP_R2
Position
Researcher - AI data scientist (R2) - AI4S
Closing Date
Monday, 16 November, 2026
Reference: 436_26_CASE_DPPP_R2
Job title: Researcher - AI data scientist (R2) - AI4S
About BSC
The Barcelona Supercomputing Center - Centro Nacional de Supercomputación (BSC-CNS) is the leading supercomputing center in Spain. It houses MareNostrum, one of the most powerful supercomputers in Europe, was a founding and hosting member of the former European HPC infrastructure PRACE (Partnership for Advanced Computing in Europe), and is now hosting entity for EuroHPC JU, the Joint Undertaking that leads large-scale investments and HPC provision in Europe. The mission of BSC is to research, develop and manage information technologies in order to facilitate scientific progress. BSC combines HPC service provision and R&D into both computer and computational science (life, earth and engineering sciences) under one roof, and currently has over 1000 staff from 60 countries.
Look At The BSC Experience
BSC-CNS YouTube Channel
Let's stay connected with BSC Folks!
We are particularly interested for this role in the strengths and lived experiences of women and underrepresented groups to help us avoid perpetuating biases and oversights in science and IT research. In instances of equal merit, the incorporation of the under-represented sex will be favoured.
We promote Equity, Diversity and Inclusion, fostering an environment where each and every one of us is appreciated for who we are, regardless of our differences.
If you consider that you do not meet all the requirements, we encourage you to continue applying for the job offer. We value diversity of experiences and skills, and you could bring unique perspectives to our team.
Context And Mission
The Barcelona Supercomputing Center’ Data Visualization and Analytics group is looking for a data scientist specialized in AI.
The group has 5 research lines -Industrial Data Science, Urban Data Science, Interactive Data Visualization, Data Storytelling, and Arts+Science Driven Innovation. The goal of this position is to work as data scientist across all of the lines, as most projects include a combination of skills. In particular, to apply AI and advanced statistical methods to problems in advanced manufacturing and factory operation, digital services, energy efficiency, urban planning, digital democracy, as well as science dissemination.
The candidate will join the currently ongoing projects and work with the teams from all the related lines of research. The candidate will also work on procuring funding for future projects.
The funding for these actions/fellowships and contracts comes from the European Union Recovery and Resilience Facility - Next Generation, within the framework of the General Invitation by the public business entity Red.es to participate in the talent attraction and retention programs within Investment 4 of Component 19 of the Recovery, Transformation, and Resilience Plan.
For more information, please check: https://www.bsc.es/join-us/excellence-career-opportunities/ai4s
Key Duties
- Data exploration and preparation.
- Talking to end users and domain experts to capture the key components of a problem.
- Exploratory modeling (architecture design, pipeline design).
- Visualization and presentation of preliminary results.
- Advise younger researchers and engineers in the group.
- Help write reports, deliverables, and research proposals.
- Education
- Masters or PhD Degree in Computer Science, Mathematics, or technoogy related field.
- Essential Knowledge and Professional Experience
- Experience with AI and advanced statistical models applied to science and industry
- Experience working on applied data science projects.
- Strong AI programming experience, preferably in Python
- Strong initiative to carry on research and development independently.
- Additional Knowledge and Professional Experience
- Fluency in English is essential. Proficiency in Spanish and other European languages would be advantageous.
- Experience on some of the application fields of the group’s projects
- Competences
- Ability to work in a team and in a multi-cultural environment.
- Excellent communication skills, especially for producing documentation (reports, manuals, papers).
- The position will be located at BSC within the CASE Department
- We offer a full-time contract (35h/week), a good working environment, a highly stimulating environment with state-of-the-art infrastructure, flexible working hours, extensive training plan, restaurant tickets, private health insurance
- Duration: until 31/12/2028
- Holidays: 22 days of holidays + 6 personal days + 24th and 31st of December per our collective agreement
- Salary: 45.00,00€
- Additional Expenses Grant: Each fellowship will be associated with a grant for additional expenses, such as IT equipment, travel, training, stays, etc.
- Starting date: asap
All applications must be submitted via the BSC website and contain:
- A full CV in English, including contact details.
- A cover/motivation letter with a statement of interest in English, clearly specifying for which specific area and topics the applicant wishes to be considered. Additionally, two references for further contacts must be included. Applications without this document will not be considered.
The selection will be carried out through a competitive examination system ("Concurso-Oposición"). The recruitment process consists of two phases:
- Curriculum Analysis: Evaluation of previous experience and/or scientific history, degree, training, and other professional information relevant to the position. - 40 points
- Interview phase: The highest-rated candidates at the curriculum level will be invited to the interview phase, conducted by the corresponding department and Human Resources. In this phase, technical competencies, knowledge, skills, and professional experience related to the position, as well as the required personal competencies, will be evaluated. - 60 points. A minimum of 30 points out of 60 must be obtained to be eligible for the position.
In accordance with OTM-R principles, a gender-balanced recruitment panel is formed for each vacancy at the beginning of the process. After reviewing the content of the applications, the panel will begin the interviews, with at least one technical and one administrative interview. At a minimum, a personality questionnaire as well as a technical exercise will be conducted during the process.
The panel will make a final decision, and all individuals who participated in the interview phase will receive feedback with details on the acceptance or rejection of their profile.
At BSC, we seek continuous improvement in our recruitment processes. For any suggestions or comments/complaints about our recruitment processes, please contact [email protected].
For more information, please follow this link.
Deadline
The vacancy will remain open until a suitable candidate has been hired. Applications will be regularly reviewed and potential candidates will be contacted.
OTM-R principles for selection processes
BSC-CNS is committed to the principles of the Code of Conduct for the Recruitment of Researchers of the European Commission and the Open, Transparent and Merit-based Recruitment principles (OTM-R). This is applied for any potential candidate in all our processes, for example by creating gender-balanced recruitment panels and recognizing career breaks etc.
BSC-CNS is an equal opportunity employer committed to diversity and inclusion. We are pleased to consider all qualified applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or any other basis protected by applicable state or local law.
For more information follow this link
This position is reserved for candidates who meet the requirements and have the legal status of disabled persons with a degree of disability equal to or greater than 33%. In case there are no applicants with disabilities that meet the requirements, the rest of the candidates without declared disability will be evaluated.
Application Form
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Data Scientist
11 oct.BizAway
Barcelona, ES
Data Scientist
BizAway · Barcelona, ES
. Python Azure Cloud Coumputing AWS R Machine Learning
About BizAway
Here at BizAway, we Deliver the Future of Travel. 😎
We are a solid international company with strong ambitions and great expertise. With a focus on sustainability 🌱, on a daily basis we support companies enabling them to improve their travel management through our constantly evolving services and solutions, always characterized by our tech attitude and smart and innovative processes. 🚀
We know that success comes from People and deserves to be recognized.👫Proactivity and
Reliability, Kind collaboration, and communication are the core values of our Solution Culture.
If you like challenges and would love to be part of one of the fastest-growing B2B scale-ups, then BizAway is the company you have been looking for. 🤩
We are looking for
We are looking for a driven and enthusiastic Data Scientist (m/w/d) , who desires to contribute to the growth and success of our Data & Analytics Team.
Your role in BizAway
- You design, build, and improve analytical and predictive solutions, from statistical models to reporting and dashboards, turning findings into clear, actionable insights through charts, graphs, and dashboards.
- You learn all aspects of the travel industry from Finance, Products, Sales, and Service/Operations perspectives, translating data into actionable insights and verifiable reporting, and identifying opportunities where machine learning or automation can add value.
- By developing domain expertise in our industry, you engage with Business and Strategy stakeholders to help define KPIs and metrics, including how data will be captured, shared, modeled, and leveraged across our departments.
- You contribute to building the foundations of a comprehensive source of truth through data modeling, and you help prototype and operationalize data science use cases (e.g., forecasting, segmentation, recommendation).
- Previously worked in a Tech Company
- Demonstrated experience with Python (or R) for data analysis and modeling
- Working knowledge of core machine learning concepts and common libraries (e.g., pandas, scikit-learn)
- Demonstrated experience with BI Data Visualization tools (Qlik preferred)
- Data analysis, presentation, and visualization experience
- Strong communication skills required
- Ability to work alone or in a team as required
- Bachelor's degree in Statistics, Computer Science, Mathematics, Engineering, Economics, or a related field is preferred
- English proficiency (written and spoken, level B2)
- Exposure to ML deployment, MLOps, or cloud platforms (AWS, GCP, Azure)
- Familiarity with generative AI / LLMs and their applied use cases
- Experience working with large or unstructured datasets
📄 Contract type: Permanent
🕓 Working hours: Full-time – 40h/week, from Monday to Friday
🏢 Hybrid setting, flexible working policy, and great offices in Europe
💰 Salary: Attractive compensation, including equity in the company
💼 Equity in the company (stock options plan)
✈️ A seat on a scale-up with skyrocketing growth
📈 Development of your entrepreneurial spirit, having the chance to implement real-impact business decision
🌍Multicultural and international team
🙌Collaborative and smart environment to work and learn
🍻Free coffee to kick-start your day and free beers to celebrate together
BizAway avoids any discrimination based on age, gender, sexual orientation, health status, nationality, political opinions, and religious beliefs in all decisions affecting personnel selection.
Criteo
Barcelona, ES
Senior Data Scientist, Commerce Analytics & Insights
Criteo · Barcelona, ES
. Python TSQL QA Spark
What You'll Do:
We are looking for a senior, strategic, and hands-on Data Scientist to lead the data and methodological backbone of Commerce Analytics and Commerce Insights at Criteo. This person will own the analytical rigor behind the work: building and improving pipelines, understanding source tables and data dependencies, ensuring reliable execution, and defining or validating the methodologies behind key metrics and outputs.
This role is not only about producing analyses. It is about creating trusted, scalable analytical foundations for Commerce Analytics and Insights, while staying close enough to business context to ensure the work remains relevant and useful.
Success in this role means pipelines and analytical workflows are reliable, maintainable, and trusted; metrics are clearly defined, methodologically sound, and consistently applied; and analytical outputs are accurate and resilient enough for repeated commercial use. Data dependencies, assumptions, and limitations should be documented and understood, while manual analytical work should decrease over time as scalable solutions are introduced.
This role is not the primary owner of client orchestration or commercial project leadership. Its center of gravity is data execution, methodological rigor, and scalable analytical foundations.
What You'll Do
- Own the data-science and analytical execution layer of Commerce Analytics and Commerce Insights
- Build, improve, and maintain data pipelines that power recurring analytics and insightgeneration
- Develop deep understanding of source tables, data lineage, business logic, and data qualityrisks
- Ensure analytical outputs are correct, consistent, and operationally reliable
- Define, document, challenge, and improve methodologies behind key metrics, cuts, andanalytical frameworks
- Partner with Solution Architect and commercial stakeholders to translate business questionsinto robust analytical approaches
- Drive the hands-on execution of analyses across commerce analytics and commerce insightsuse cases
- Create scalable approaches rather than one-off manual work whenever possible
- Investigate data issues, edge cases, or inconsistencies and resolve them with strongownership
- Contribute to documentation, process improvement, and knowledge transfer so that work canscale beyond one individual
- Help identify where automation, standardization, or better data design can improve quality and speed
- Stay close to business context so that technical execution remains aligned with client and program needs
- Senior and hands-on, with strong ownership of both execution and quality
- Deeply comfortable with data engineering and pipelines, analytical logic, and metric design
- Strong SQL, Python, spark and strong coding skills for data processing and workflowdevelopment
- Experience building production-grade or near-production analytical pipelines
- Experience documenting methods and educating stakeholders on metric definitions and analytical caveats is a plus
- Able to understand what tables mean, how they connect, and where business interpretation can go wrong
- Methodologically rigorous, with strong judgment on how to define and validate metrics
- Structured and practical: you can move from ambiguous business questions to executable analytical solutions
- Comfortable collaborating with client-facing and non-technical stakeholders, even if this is not the center of gravity of the role
- Strategic enough to improve the system, not just execute within it
- Significant experience in data science, analytics engineering, analytical product work, or a similar role in a data-rich environment
- Strong understanding of experimentation, metrics, methodology design, and analytical QA
- Experience working with large-scale behavioral, commerce, or media datasets
Who We Are:
We’re Criteo, the Commerce Intelligence Platform. Criteo helps businesses turn shopper signals into commerce outcomes while delivering more relevant experiences for shoppers. We use proprietary commerce intelligence and AI decisioning to drive relevance for shoppers and performance for businesses.
At Criteo, our culture is as unique as it is diverse. From our offices across the globe or from the comfort of home, our 3,600 Criteos collaborate together to build an open, impactful, and forward-thinking environment.
We foster a workplace where everyone is valued, and employment decisions are based solely on skills, qualifications, and business needs—never on non-job-related factors or legally protected characteristics.
What We Offer:
🏢 Ways of working – Our hybrid model blends home with in-office experiences, making space for both.
📈 Grow with us – Learning, mentorship & career development programs.
💪 Your wellbeing matters – Health benefits, wellness perks & mental health support.
🤝 A team that cares – Diverse, inclusive, and globally connected.
💸 Fair pay & perks – Attractive salary, with performance-based rewards and family-friendly policies, plus the potential for equity depending on role and level.
Additional benefits may vary depending on the country where you work and the nature of your employment with Criteo.