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Search for Freelance Data Science Engineer (Python & SQL) - Remote

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Toloka-AI logo
Full-time|Remote|Remote — València, Valencian Community, Spain

Role overview Toloka-AI seeks a Python Developer with hands-on experience in artificial intelligence projects. This remote role centers on building and maintaining AI-driven solutions that support a variety of initiatives. The position is open to candidates based in València, Valencian Community, Spain, or those willing to work from this location. What you w…

Apr 25, 2026
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Sopra Steria logo
Data Engineer

Sopra Steria

Full-time|On-site|Madrid

Join Sopra Steria as a Data Engineer and play a key role in transforming data into actionable insights. You will work with cutting-edge technologies to develop data pipelines, manage data architecture, and ensure data quality. Your expertise will help drive strategic decision-making and improve operational efficiency.

Feb 16, 2026
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N26 logo
Full-time|On-site|Madrid

Join Our Team as a WFM Forecasting Expert Hello! I’m Brayn, the Global WFM Manager at N26, and I am excited to invite a talented WFM Forecasting Expert to become a vital part of our newly established Operations team in Madrid. Do you possess hands-on management expertise in forecasting processes? Are you passionate about tackling complex challenges using SQL and Python to develop and refine forecasting models as well as conduct data analysis and KPI monitoring? Do you thrive on building and maintaining effective forecasting within Operations? About the Role The Forecasting Expert is a key position within our workforce management team, responsible for overseeing the WFM Forecasting processes for one or multiple business lines, depending on their scale. This role entails managing volume forecasts, input metrics, and the creation, delivery, and presentation of forecasts to both internal and external stakeholders, ensuring the fulfillment of forecasting targets and Service Level Agreements. Key Responsibilities Maintain volume forecasting from information gathering through to delivery and stakeholder reporting. Conduct regular process reviews and plan improvement projects from start to finish. Ensure all service desk tickets and WFM emails are processed within the agreed SLA. Utilize concise oral and written communication skills to present solutions in a business context. Foster a culture of innovation and collaboration within the team. Qualifications for Success Ability to embrace and drive change with a positive and resilient approach to challenges. Exceptional communication skills to effectively convey ideas, theories, and technical information to operational and managerial staff. Proficiency in English is essential; additional languages relevant to our markets are advantageous. Experience with advanced spreadsheet tools (Excel or Google Sheets). Proficiency in SQL and Python; knowledge of similar programming languages is a plus. Previous experience in a similar role is required. Familiarity with workforce management technologies, particularly Calabrio, is beneficial but not mandatory. Why Join Us? Accelerate your career growth by joining one of Europe’s most innovative disruptors! Enjoy a range of employee benefits, including a competitive personal development budget and a work-from-home allowance.

Apr 7, 2026
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jobgether logo
Full-time|On-site|Spain

Jobgether is hiring a Senior Data Engineer based in Spain. This position centers on designing, building, and improving data pipelines to support business goals and product development. Role overview The Senior Data Engineer will work closely with teams across the company to create and refine scalable data solutions. The work involves both implementation and ongoing optimization, ensuring that data flows efficiently and reliably throughout the organization. What you will do Design and implement data pipelines for various business and product needs Optimize existing systems for performance and scalability Collaborate with colleagues from different departments to deliver data-driven solutions Impact Your work will enable jobgether to make informed decisions and improve its offerings by making the most of available data.

Apr 29, 2026
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Constructor logo
Full-time|$80K/yr - $120K/yr|Remote|Remote — Spain

About UsConstructor is a pioneering platform revolutionizing search and discovery in the ecommerce sector. We are dedicated to optimizing critical metrics such as revenue, conversion rates, and profit margins. Our search engine is entirely developed in-house, utilizing advanced transformer models and generative large language models (LLMs). This foundational technology empowers various applications, from search functionalities to personalized recommendations and interactive shopping agents. Engineering is our largest department, and we are proud to affirm that our proprietary engine has consistently outperformed competitors in A/B testing, a testament to our commitment to excellence. We are at the forefront of AI innovation, constantly pushing boundaries to maintain our edge in the market.Our engine is designed for extreme scalability, processing over 1 billion queries daily across 150 languages and approximately 100 countries. Our technology supports some of the world's leading ecommerce brands, including Sephora, Under Armour, and Petco.At Constructor, we are a passionate team eager to solve complex challenges and enhance the experiences of our customers and colleagues alike. We prioritize values such as empathy, openness, curiosity, and a commitment to continuous improvement. We believe that empowering everyone within the organization to excel in their roles leads to remarkable outcomes.Founded in 2019 by Eli Finkelshteyn and Dan McCormick, Constructor is a U.S.-based company that continues to thrive under their leadership.About the TeamThe Recommendations team is pivotal in enhancing user experiences for our customers and their end-users. We comprise a dedicated group of cross-functional engineers who thrive on challenges and are committed to improving lives through technology. We uphold values of transparency, curiosity, and continuous refinement in our work, believing that empowering team members to take initiative fosters exceptional results.Our team is focused on advancing traditional product discovery methods while exploring innovative solutions powered by large language models, pioneering a new era of user engagement and innovation.The Recommendations team manages multiple service endpoints and develops our own cloud-deployed solutions using Python, which necessitates leveraging NoSQL databases and interfacing with both internal and external services. Our future roadmap includes transitioning all major developments into high-load distributed services.About the JobThis role primarily involves designing, delivering, and maintaining high-load real-time web services in close collaboration with talented engineers from both the recommendations team and other departments.Develop, deploy, and support robust recommendation services, including I/O-bound web services, CPU-bound services, and data services.Create AWS CloudFormation scripts, Jenkins jobs, and GitHub actions adhering to industry best practices.Establish service observability, monitoring metrics, and alerting mechanisms (using tools like Prometheus and Grafana).

Jan 16, 2026
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Veeva Systems Inc. logo
Full-time|Remote|Spain - Barcelona

Veeva Systems is a purpose-driven leader in industry cloud solutions, dedicated to accelerating the delivery of therapies to patients across the globe. As one of the fastest-growing SaaS companies ever, we achieved over $3B in revenue last year, with significant growth opportunities ahead. Our core values are at the heart of everything we do: Integrity, Customer Success, Employee Success, and Speed. We made history in 2021 by becoming a public benefit corporation (PBC), which means we are legally committed to balancing the needs of our customers, employees, society, and investors. As a Work Anywhere company, we empower you to choose whether to work from home or from the office, allowing you to thrive in an environment that suits you best. Join us in transforming the life sciences industry, making a meaningful impact for our customers, employees, and communities.The Role As part of Veeva OpenData Commercial, which provides healthcare reference data globally, you will play a pivotal role in enhancing commercial sales execution, compliance, and business analytics. Within our Engineering team, you will implement significant changes and contribute to building a robust global data core for life sciences across over 100 countries. This position is ideal for a software engineer eager to learn, innovate, and tackle complex challenges. If technology excites you, you will find a welcoming home within our team, which is dedicated to maintaining a world-class engineering culture centered on integrity and our commitment to serving our customers effectively.

Oct 6, 2025
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Fever logo
Full-time|On-site|Madrid

Welcome to Fever! We are the leading tech platform globally for culture and live entertainment.Our mission is simple: to democratize access to culture and entertainment. Through our innovative technology and data-centric approach, we are transforming how people experience live entertainment. Each month, we inspire over 300 million individuals across more than 40 countries, enabling event creators with our data and technology to innovate and connect with new audiences.Our achievements include collaborations with prominent industry giants such as Netflix, F.C. Barcelona, and Primavera Sound, along with internationally acclaimed experiences, all supported by top-tier global investors. Quite impressive, isn’t it?To fulfill our mission, we seek ambitious individuals with a practical mindset who are excited to help shape the future of entertainment!Are you ready to join us on this journey?Let’s delve into this role and discover how you can contribute to Fever’s mission.About the RoleAt Fever, we are developing a federated data organization that harmonizes centralization where necessary and autonomy where it adds value. Our teams utilize modern data platforms (Snowflake, DBT, Airflow, DataHub, Metabase, etc.), and we are also creating our own technology to provide high-quality data products across various business sectors.As a Business Intelligence Engineer, you will serve as a crucial link between data engineering and business analytics, ensuring our stakeholders have access to reliable, well-structured, and easily discoverable datasets.Your ResponsibilitiesDesign, develop, and sustain data models (DBT, SQL) that convert raw data into clean, reliable datasets for self-service and reporting purposes.Collaborate with the data engineering team to define and validate essential business metrics (revenue, engagement, marketing performance, B2B KPIs, etc.).Engage with business squads (B2B, Marketing, CRM, Product) to comprehend their requirements and translate them into reusable data assets.Ensure data quality and consistency by partnering with the data engineering team on testing frameworks, observability, and governance.Facilitate self-service analytics by empowering stakeholders to access and analyze data autonomously.

Feb 24, 2026
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Datavant logo
Full-time|On-site|Barcelona, Spain

At Datavant, we are revolutionizing healthcare through data collaboration. Our mission is to ensure that health data is secure, accessible, and actionable, enabling organizations—from healthcare providers to researchers—to improve patient outcomes. Join our innovative team and contribute to groundbreaking solutions that power the AI revolution in healthcare.Your Opportunity: Be Part of Our Life Sciences Tech Hub in BarcelonaAs we expand our global presence, we're establishing a Life Sciences Tech Hub in Barcelona and are in search of skilled full stack engineers who are passionate about creating impactful healthcare technology. Your role will involve designing and implementing systems that ensure secure, privacy-compliant access to high-quality healthcare data for pharmaceutical companies, biotech innovators, and research institutions worldwide. Your contributions will accelerate clinical trials and improve patient care by making critical data interoperable and trustworthy.At Datavant, you'll have the chance to apply your technical skills and problem-solving expertise in a supportive environment dedicated to our mission: empowering every healthcare decision with the right data, at the right time, in the right format. We seek innovators, dreamers, and doers who are ready to make a difference.Why Join Our Tech Team?Collaborate with engineering leaders on strategies and technology vision.Mentor colleagues through code reviews and software design.Work with a diverse technical stack, including cloud and on-premise solutions, big-data analytics, and complex algorithms.

Feb 25, 2026
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inetum2 logo
Full-time|On-site|Madrid

Join our dynamic team at inetum2 as a Data Analyst, where you will leverage your analytical skills to extract valuable insights from data. Your ability to interpret complex datasets will play a crucial role in driving our business strategies and decision-making processes. We seek an individual who is passionate about data and eager to contribute to innovative projects that enhance our operational efficiency.

Feb 12, 2025
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Syntegon Technology GmbH logo
Full-time|On-site|Terrassa

We are seeking a Mechanical Motion Engineer with expertise in robotic systems, such as robotic grippers, specializing in life science equipment, preferably with experience in the pharmaceutical or food industry, to join our dynamic team in Terrassa. In this role, you will be responsible for designing, developing, and enhancing cutting-edge equipment for the life sciences sector.Design and develop innovative mechanical systems for life science equipment using CAD software.Conduct finite element analysis (FEA) to optimize product performance and reliability.Collaborate with cross-functional teams to ensure product designs meet customer requirements and industry standards.Manage projects from concept to production, adhering to timelines and budget constraints.Create technical documentation, including design specifications, testing protocols, and user manuals.Identify and resolve mechanical issues in existing products.Stay updated on the latest advancements in life science equipment and mechanical engineering technologies.Ensure compliance with FDA regulations and ISO standards for medical devices.Participate in design reviews and contribute to continuous improvement initiatives.

May 4, 2026
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Lighthouse logo
Data Engineer

Lighthouse

Full-time|On-site|Greater Madrid Metropolitan Area

At Lighthouse, we are on a transformative journey to revolutionize commercial strategies in the hospitality industry. Our advanced commercial platform simplifies data complexity, equipping businesses with actionable insights, sophisticated pricing tools, and state-of-the-art business intelligence—all designed to maximize revenue potential.With $370 million in Series C funding and a relentless drive for growth, we have integrated five companies into our ecosystem and achieved over $100 million in ARR by 2024. Our team of over 850 professionals spans 35 countries and embodies 34 diverse nationalities.At Lighthouse, we prioritize community. We foster a collaborative and enjoyable work culture, passionately working together to redefine the hospitality sector. Are you ready to join us on this exciting journey and shine in one of the industry's most dynamic environments? Your RoleAs a Data Engineer within our newly established Data Products team, you will be instrumental in enhancing the quality and business value of our core data assets. You will take a hands-on approach to design, build, and maintain data pipelines that support various teams at Lighthouse. Acting as the liaison between our data and business needs, you will collaborate with stakeholders to ensure our data serves its users effectively.Your ImpactEstablish expertise in key data products, ensuring thorough understanding of the full data lifecycle, quality, and business applications.Design, implement, and oversee the streaming and batch data pipelines that drive our products and internal analytics.Work directly with data consumers to comprehend their requirements and deliver tailored data solutions.Enhance data quality, latency, and reliability.Adopt a product engineering mindset, centered on delivering value and resolving business challenges through data.Lead our AI evolution by integrating intelligence into our platform. You will not only develop AI features for our clients but also promote an AI-first development culture within the engineering team.Mentor fellow engineers, sharing your knowledge and contributing to their professional growth.Our TeamThe Data Products Team serves as the cornerstone of Lighthouse's data ecosystem, providing the definitive source of truth for our data. Their primary mission is to model and deliver high-quality foundational data products, essential for downstream product features, machine learning models, and data science initiatives across the organization.

Apr 3, 2026
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Deel logo
Full-time|On-site|Spain

We are seeking a talented and innovative AI/ML Engineer specializing in Python to join our dynamic team at Deel. In this role, you will leverage your expertise in artificial intelligence and machine learning to contribute to cutting-edge projects that enhance our services and solutions. This is an exciting opportunity to be at the forefront of technological advancements in a rapidly evolving industry.

Mar 19, 2026
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scalian logo
Full-time|On-site|Madrid o Málaga

Scalian is hiring a Junior Data Engineer to join its team in Madrid or Málaga. This role offers the chance to develop foundational data engineering skills by working directly with experienced colleagues and participating in real-world projects. Role overview This entry-level position centers on learning through hands-on involvement with modern data technologies. The Junior Data Engineer will take part in projects that enhance the company's data infrastructure and processes. What you will do Collaborate with senior engineers and data scientists to design, build, and maintain data pipelines and systems Assist in ongoing projects aimed at strengthening the company’s data capabilities Help develop solutions for better data collection, processing, and utilization Location This position is based in either Madrid or Málaga.

Apr 27, 2026
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Veeva Systems Inc. logo
Data Lead - OpenData Europe

Veeva Systems Inc.

Full-time|Remote|Spain - Barcelona

Location: Barcelona, Spain (Remote within UK, Germany, or Spain; ~10% travel) About Veeva Systems Veeva Systems develops industry cloud solutions for the life sciences sector. The company focuses on helping deliver therapies to patients more quickly. Last fiscal year, Veeva reached over $3B in revenue. Growth continues, fueled by a commitment to core values: Do the Right Thing, Customer Success, Employee Success, and Speed. In 2021, Veeva became a public benefit corporation (PBC), balancing the interests of customers, employees, society, and investors. Veeva supports flexible work arrangements as a Work Anywhere company. Employees can work from home or the office. Learn more about Veeva’s mission to transform the life sciences industry. Role Overview: Data Lead - OpenData Europe The OpenData team aims to become the global leader in reference data for life sciences. Veeva’s data products form the backbone of commercial and medical operations for top pharmaceutical and biotech companies worldwide. This Data Lead role shapes the future of OpenData Europe. The work directly supports faster delivery of life-saving treatments. As part of a public benefit corporation, purpose and profit are equally important. The team values autonomy, speed, and ownership. What You Will Do Lead the product roadmap for data products in the OpenData Europe portfolio Manage and optimize data pipelines Drive product strategy and identify new market opportunities Oversee cross-functional execution from concept through delivery Work remotely within the UK, Germany, or Spain, with travel up to 10% Who We’re Looking For Technical expertise in data analytics or data engineering Experience leading data initiatives, not just responding to requests Entrepreneurial mindset and desire to own product direction Comfort working with autonomy and driving results across teams

Apr 16, 2026
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Mindrift logo
Part-time|$50/hr - $50/hr|Remote|Remote — València, Valencian Community, Spain

Mindrift brings together subject matter experts and AI projects from top technology companies. The team collaborates globally to apply real-world knowledge to Generative AI work. Role overview This freelance, part-time position focuses on the Tendem project. Based in València or working remotely from the Valencian Community in Spain, the Low-Code Automation Engineer will design, build, and refine automation workflows. The role uses platforms like Make.com and n8n, along with JavaScript, to connect and optimize business systems. What you will do Create and review complex automation workflows for various business tools and platforms. Develop and enhance workflows using low-code platforms such as Make.com and n8n, along with APIs, webhooks, and event-driven logic. Integrate custom JavaScript to manage advanced logic, data transformations, and edge cases within automation tools. Connect and synchronize data across systems like Airtable, Google Sheets, Notion, and CRMs. Implement error handling, logging, and backup strategies to keep workflows running reliably. Troubleshoot and optimize automations to minimize failures and improve efficiency. Support automation of communication and operational processes, including messaging, outreach, and notifications. Who this role suits This position is well suited to professionals with experience in low-code automation, workflow design, and JavaScript customization. Strong problem-solving abilities and attention to quality assurance are important for success. Compensation Contributors can earn up to $50 per hour, depending on expertise and level of contribution. Actual rates vary by project scope, complexity, and required skills. Other Mindrift projects may offer different rates based on their needs.

Apr 24, 2026
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Airalo logo
Full-time|On-site|Spain

As a Data Engineering Manager at Airalo, you will lead a dynamic team of data engineers in designing and implementing robust data solutions that empower our business analytics and decision-making processes. You will collaborate closely with cross-functional teams to ensure the effective use of data across various platforms, optimizing performance and scalability.Your role will involve mentoring team members, managing projects, and driving innovation in data engineering practices. If you are passionate about data and have a vision for the future of data engineering, we want to hear from you!

Apr 13, 2026
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Turner Townsend logo
Senior Data Engineer

Turner Townsend

Full-time|On-site|Madrid

Turner Townsend is looking for a Senior Data Engineer in Madrid to help shape the company's data strategy. This position centers on designing, building, and maintaining data pipelines and architecture to support business intelligence and analytics across the organization. Role overview The Senior Data Engineer will work closely with teams from different departments, ensuring that data is reliable, accessible, and secure. The work involves both hands-on development and ongoing support of the systems that deliver insights for key projects. What you will do Design and implement data pipelines and architecture Maintain and monitor data systems to ensure integrity and availability Collaborate with cross-functional teams to support analytics and reporting needs Contribute to data security and compliance practices Requirements Experience building and maintaining data pipelines and architectures Strong understanding of data integrity, availability, and security principles Ability to work collaboratively with technical and non-technical teams

Apr 28, 2026
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Talan logo
Full-time|On-site|Málaga

Join Talan as a Senior Data Lead Engineer in Málaga and lead cutting-edge data initiatives. In this pivotal role, you'll drive data strategy, architecture, and engineering processes while mentoring a team of skilled engineers. Your expertise will ensure the delivery of high-quality data solutions that support our clients' business objectives.

Apr 8, 2026
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Altersolutions logo
Full-time|On-site|Madrid

Join Altersolutions as a Python Developer and be part of a dynamic team in Madrid! We are looking for passionate and talented individuals to contribute to exciting projects and drive innovation.

May 31, 2023
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Miratech logo
Full-time|On-site|Madrid

Role overview Miratech is hiring a Senior Data Engineer in Madrid. This position focuses on designing and building scalable data solutions that support key business needs. The Senior Data Engineer works closely with teams from different disciplines to improve data workflows and maintain data quality. What you will do Design and implement scalable data architectures Collaborate with cross-functional teams on data-related projects Optimize data processes for efficiency and reliability Ensure data integrity across systems Apply expertise in modern data technologies

Apr 20, 2026

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