WHAT MAKES US A GREAT PLACE TO WORKWe are proud to be consistently recognized as one of the world's best places to work. We are currently the top ranked consulting firm on Glassdoor's Best Places to Work list and have earned the #1 overall spot a record seven times. Extraordinary teams are at the heart of our business strategy, but these don't happen by chance. They require intentional focus on bringing together a broad set of backgrounds, cultures, experiences, perspectives, and skills in a supportive and inclusive work environment. We hire people with exceptional talent and create an environment in which every individual can thrive professionally and personally.WHO YOU'LL WORK WITHAbout CoroThe Coro business unit brings together Bain's proprietary suite of software-as-a-service (SaaS) and data-as-a-service (DaaS) tools, including cloud-based software, online capability assessments, and advanced analytics, focused on enabling Commercial Excellence for B2B companies.You'll work closely with data scientists, data engineers, and software engineers to develop sophisticated approaches to entity resolution at scale. Your focus will be on experimentation and model quality, while your engineering partners will help bring successful approaches into production.WHERE YOU'LL FIT WITHIN THE TEAMAs a Senior Applied Data Scientist, you'll focus on one of the most challenging problems in large-scale data: determining when records from different sources refer to the same real-world business.You'll develop and test machine learning, embedding, and large language model (LLM) approaches that improve how we match and resolve complex entity data. You'll explore how far emerging foundation-model techniques can improve match quality while ensuring solutions remain practical, scalable, and cost-effective across hundreds of millions of entities.This is a highly applied role where you'll have the opportunity to experiment with emerging AI techniques, measure their impact,



and work with engineering teams to turn the strongest ideas into scalable solutions.WHAT YOU'LL DODevelop Smarter Entity MatchingBuild and evaluate machine learning, embedding, and LLM-based approaches for entity resolutionImprove how our systems handle complex and messy data, including name variations, aliases, domains, websites, firmographic attributes, multilingual records, and data hierarchiesDevelop scoring and ranking approaches that distinguish genuine matches from lookalikes, duplicates, and unrelated entitiesEvaluate AI and machine learning techniques while balancing accuracy, scalability, and costDesign solutions for large-scale use, identifying where sophisticated models add value and where more efficient approaches can achieve comparable resultsImprove Experimentation & Model QualityDevelop robust approaches to measuring match quality, including precision, recall, false positives, false negatives, confidence, coverage, and manual review requirementsHelp build trusted benchmark datasets to compare new approaches with existing matching methods before production rolloutExplore LLM-assisted review and validation both as a matching technique and as a benchmark for more scalable approachesTranslate ambiguous matching challenges into clear hypotheses, experiments, metrics, and recommendationsConduct detailed error analysis to understand model behavior and identify opportunities for improvementBring Successful Approaches to ProductionPartner closely with data and software engineers to turn promising prototypes into production-ready matching solutionsProvide clear model specifications, expected behaviors,



evaluation results, edge cases, and rollout criteriaHelp determine the right matching techniques for different data tiers, confidence levels, and cost profilesMeasure impact, diagnose regressions, and recommend improvements to models and matching logicClearly communicate trade-offs across model quality, scale, cost, latency, explainability, and operational riskABOUT YOURequired Qualifications5-8 years of relevant professional experience in applied data science, machine learning, or a related fieldStrong applied machine learning expertise, including hands-on experience building and evaluating models using real-world dataExcellent Python and SQL skillsPractical experience with embeddings, semantic similarity, LLMs, or related AI techniquesHands-on experience training supervised and unsupervised models, including classification and NLP applicationsWorking knowledge of neural networks and transformer architecturesExperience with machine learning frameworks such as TensorFlow, PyTorch, or PyCaretExperience retraining taxonomy classifiers or maintaining classification models in productionStrong experimental judgment, including the ability to define baselines, evaluation metrics, test sets, and error analysesAbility to clearly explain model behavior, technical trade-offs, and edge cases to engineering and business stakeholdersPreferred QualificationsExperience with entity resolution, record linkage, deduplication, or similar matching problemsExperience with ranking, similarity scoring, retrieval, clustering, or candidate-generation techniquesExperience applying LLMs or embeddings to large-scale business problems where performance, scalability, and cost are important considerationsExposure to large-scale data platforms such as Spark, Snowflake, Databricks, or BigQueryFamiliarity with company, domain, website, firmographic, or other business-entity data
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📌 Data Scientist (España)
🏢 Bain
📍 España