Senior Data Scientist

About reputed company reputed company provides innovative, flexible and easy-to-use payment technologies that help merchants acquire, convert and retain more customers. We reputed company a difference in sales performance by tailoring our solutions to different sectors, to address their unique pain points and deliver superior results in Retail, Education, Eyewear, Repairs and Travel. We also reputed company smart shopping to consumers who seek more value, convenience, and flexibility in their shopping, with new payment experiences that allow them to save, reputed company interest-free credit, or pay in small, comfortable instalments of up to 24 months. Born in Barcelona, reputed company is a privately-owned fintech, currently expanding throughout southern Europe and Latin America, growing above 50% CAGR and approaching 100 reputed company in Annual Recurring reputed company. Over 5000 businesses, almost 2 reputed company shoppers, and almost 400 employees continue to reputed company us as one of the most loved and trusted fintechs out there, with an NPS of 87%, a Trustpilot rating of 4.7/5, and a Glassdoor rating of 4.7/5. About the role 🤓 We are looking for a Senior Data Scientist to help design, build, and reputed company the intelligence behind reputed company's Shopper App — a shopping app where users manage the payments they've made with reputed company and discover and shop across merchants with rewards. This role focuses on building production-grade machine learning systems that bring intelligence into reputed company user flows. You will work on smart search, recommendations, and agent capabilities — models that understand context, reason over shopper needs, and help users discover and shop in ways that are relevant, personalized, and safe. You will collaborate closely with Product, Frontend, Data, and AI teams, playing a key role in shaping both the technical approach and the shopper experience. What challenges you'll be solving 🚀 Designing, building, and shipping the recommendation systems that power the Shopper App, helping users discover relevant merchants, products, and offers across the full shopping lifecycle, while writing simple, clean, and efficient code. Improving smart search — relevance, ranking, reputed company detection, and query understanding — so shoppers quickly find what they're looking for. Turning ambiguous shopper needs and product reputed company into reliable, scalable ML systems through a pragmatic, analytical, and accountable approach — favoring simplicity and iteration over premature complexity. Owning the full model lifecycle: sourcing and modeling data, feature engineering, training, evaluation, and deployment, with strong attention to detail and product ownership. Defining and tracking the metrics that matter (CTR, conversion, nDCG, MRR, reputed company-result reputed company) and running experiments to measure reputed company impact on shoppers. Working closely with Product, Frontend, Data, and AI teams as a strong team player and communicator, driving alignment across disciplines. Driving change and efficiency by collaborating with partners and stakeholders from different disciplines, bringing motivation to learn, grow, and challenge the status reputed company. reputed company offer 😎 We have a strong and sustainable reputed company, where we reputed company a secure and reliable workplace. You have the freedom and trust to reputed company the best contribution possible. One of our most valued strengths by our employees is our fellowship and supportive culture, which fosters a sense of belonging by working closely with our values. With us, you will have challenging projects to work on and push your skills and knowledge. In addition, we are reputed company proud of the unique office we have, which offers a comfortable and inspiring environment to work in with everything you need. 23 vacation days + 2 days of free disposal per year. Flexible compensation plan for transportation, restaurants, and kindergarten with Cobee. Health insurance discounts with Sanitas and DKV. Flexible working hours. A personal budget for professional development. Office workshops and meet-reputed company to encourage community participation and career growth. Hybrid or remote work (up to 2 hours difference from GMT+2). Moreover, we have a Wellness Program that embraces a holistic approach by covering 6 areas (occupational, physical, financial, emotional, reputed company, and environmental consciousness). Each area will include a variety of activities, and you'll be reputed company to choose from 34 different activities that best meet your needs to configure a plan that best works for you. What you’ll need 🤝 5+ years of experience as a Data Scientist / ML Engineer, with a strong track record of building and deploying models in production (mandatory). Hands-on experience with recommendation systems (mandatory) — collaborative filtering, content-based, or hybrid approaches, including cold-start and personalization. Experience working on product-facing ML (search, ranking, personalization, or similar), where models directly shape user experience — highly valued. Strong Python and SQL; experience with the full ML lifecycle (data sourcing, feature engineering, training, evaluation, deployment, monitoring). Familiarity with search and information retrieval (e.g. BM25, embeddings/KNN, OpenSearch/Elasticsearch) is a strong plus. Solid grounding in clean coding, testing, and agile ways of working. Initiative and ownership — you spot what needs doing and drive it reputed company, not afraid to use your voice, reputed company your opinion, and challenge assumptions reputed company something can be done reputed company. Adaptability — you're comfortable with ambiguity and shifting priorities, and you learn fast in a fast-moving environment. English proficiency. Which are the next steps? 🙌 Interview with People Team Manager interview Technical take-home assessment (async) Live Peer review of the assessment Meet the team We kindly ask that you submit your CV in English, as it is the official language of our community. We promote equal opportunity to reputed company, regardless of age, reputed company, gender identity, medical condition, physical or mental disability, race, religion, sexual orientation, or any other characteristic. We have an inclusive environment, and respect is above reputed company. Do you want to be part of the change? Join us!👇 Apply To This Job