Top Machine Learning Jobs in Barcelona

Lead and develop globally distributed Data and AI teams to deliver production Data/AI solutions. Drive talent development, operational excellence, stakeholder alignment, and responsible AI practices while partnering with Product and Engineering to set priorities, roadmaps, and delivery metrics.

Lead applied AI research and architecture for GenAI in cybersecurity: design LLM architectures, implement production-grade deep learning systems at scale, mentor scientists, set technical standards, and align AI strategy with business goals.

Lead organization-wide software and AI engineering strategy, design scalable cloud-native systems, drive deployment and data integration best practices, and deliver rapid prototype-to-production solutions. Own LLM and ML strategy including model fine-tuning, RAG, AI evaluation, and observability. Mentor technical leaders, shape developer experience and knowledge management, and represent engineering at executive and industry levels.

As a Senior Data Scientist, you will lead high-complexity projects, develop ML and NLP solutions, and collaborate across teams to drive business impact through statistical modeling and data analysis.

Design, build, deploy, and operate ML/LLM-powered services and features. Write production-quality Python, improve observability and performance of ML services, run experiments and analyses, partner cross-functionally, and contribute to technical design and code reviews to ship scalable AI systems.

Lead AI adoption across Wind Engineering by designing adoption plans, training programs, communities of practice, communications, and change management. Own AI enterprise cost budget, track adoption metrics, govern tool investments, and drive continuous improvement to embed AI into engineering workflows for measurable value.

Lead strategy and roadmap for BidMachines supply-side product. Own product lifecycle, collaborate with engineering, sales, publishers and data teams, analyze supply performance, and drive features for inventory management, auction dynamics, and demand-supply matching to maximize publisher revenue and advertiser satisfaction.

As an AI Director, lead AI and data programs for Specialty Chemicals, drive account growth, mentor teams, and engage C-level stakeholders strategically.

Drive innovation in post-training methodologies for AI models, focusing on agentic behaviors, tool use, and enhancing model capabilities for real-world applications.

As an AI Research Engineer, you'll optimize model deployment and inference architectures for AI systems, enhancing performance across various applications, especially on resource-constrained devices. Responsibilities include designing efficient serving architectures, conducting inference tests, and collaborating with teams to integrate solutions.

As an AI Research Engineer, you will develop and optimize vision-language models, managing the full model lifecycle from training to deployment, focusing on efficiency and innovation in multimodal architectures.

The Technical Project Manager will drive the delivery of technical features across platforms, manage project lifecycles, and facilitate communication in cross-functional teams.

Design, build, and maintain scalable ETL/ELT pipelines and dimensional data models in a cloud data warehouse. Create executive and analyst dashboards, optimize SQL and dashboard performance, enforce data governance and quality, consult with stakeholders on KPIs, and mentor junior engineers through reviews and best practices.

Lead Westernacher's Spain market by defining and executing market strategy, driving sales and profitability, and building client relationships. Split role between ~50% commercial leadership (business development, go-to-market, partner management) and ~50% delivery engagement (Project Director/Program Manager ensuring successful ERP/SAP transformations). Recruit and develop local team and ensure delivery and quality standards.

As a Senior Data Scientist at Back Market, you will design and implement machine learning models to optimize pricing strategies, collaborate with engineers, and communicate findings to stakeholders.

Lead and scale a Fraud Operations team to protect marketplace financial integrity. Own roadmap, KPIs, investigation standards, chargeback management, governance, workforce planning, and cross-functional partnership with Product, Data, Payments, and Finance to improve detection and reduce financial exposure.

Lead strategy and execution for creative products, define requirements and success metrics, prioritize with engineering and design, run experiments, collaborate cross-functionally, and drive product vision to improve creative automation, optimisation and measurement across mobile and CTV.

The Principal Product Manager will drive the strategy for AI-based pricing and reconciliation across travel services, manage model lifecycles, and ensure operational integrity in real-time financial data processing in collaboration with cross-functional teams.

Serve as the bridge between engineering and business to deliver AI products from PoC to production. Translate business needs into product requirements, manage planning and prioritization, challenge technical decisions for scalability, mitigate risks and dependencies, and maintain stakeholder alignment and delivery cadence across cross-functional teams.

As a Fraud Data Analyst, you will architect real-time defense strategies against payment fraud, develop precision rules, optimize decisioning stacks, and report performance metrics to senior leadership while ensuring a frictionless user experience.

Lead and scale Joko's end-to-end B2C growth engine (acquisition, activation, retention, reactivation). Own growth budget, LTV/CAC, measurement and incrementality, identify new growth loops, scale AI across growth operations, and build a high-performing Growth team while partnering with Product and Data for rapid execution.

Lead global marketing strategy and GTM to scale Aisle into a market leader. Own brand, PR, product positioning, full-funnel demand generation, ABM, marketing tech stack, RevOps, attribution, budget/agency management, and grow a multidisciplinary marketing team aligned to revenue targets.

The Expert AI Manager oversees AI solution delivery, manages client relationships, and drives value creation through strategic engagement and stakeholder management.

As a Data & AI Strategy Analyst, you'll support the development and implementation of data strategies, assist with analytics use cases, and help communicate insights through reports and visualizations.

The Senior Data & AI Strategist will lead data and AI transformation initiatives, advise clients, and ensure impactful strategy delivery, while mentoring team members.