frontend developer English-speaking jobs in León

Associate, Business & Legal Affairs will provide legal advice and support Youplanet's business across projects. Responsibilities include drafting, reviewing, and negotiating agreements such as influencer, production, distribution, and brand partnership contracts. Must have professional-level English and Spanish fluency, a law degree, and 3+ years of entertainment law experience.

Freelance Business Development/Sales professional to drive offline retail expansion for a premium mobile accessories brand in Barcelona. Experience in B2B sales, preferably in consumer electronics or lifestyle brands, required.

Tangent is seeking a passionate Customer Success Manager for a leading SaaS platform in Barcelona. You will build relationships with clients, understand their needs, and ensure they maximize their investment in the platform.

Experienced Junior MES Manager needed for global digital manufacturing rollout. Lead MES implementation and integration across sites, standardize production tracking, and integrate with ERP (SAP). 5-7 years of MES experience and strong ERP integration knowledge required.

The Category Manager delivers best-in-class category leadership with customers to drive growth and engagement. The role leverages market, shopper, and customer insights to identify category growth opportunities and executes these through strategic category plans. The Category Manager collaborates with customers, sales teams, and internal stakeholders to achieve mutual, profitable, and sustainable category growth.

Experienced multi-site operator needed to lead end-to-end operational performance for a growing food brand in Spain. This senior role combines strategic leadership with practical execution, focusing on commercial performance, operational consistency, customer experience, talent development, and growth initiatives.

Leads IT infrastructure and application support teams in a hybrid environment. Manages live services, incident response, and operational discipline. Requires experience in IT infrastructure operations, leadership, and ITIL.

Prepare and manage technical-economic proposals for atmospheric pollution solutions, primarily odour pollution. Coordinate with internal teams and maintain the proposal register.

Lead Product (Curriculum & Features) to own the evolution of C360, a learning platform for K-12 education. Shape curriculum structure, learning progressions, and teacher workflows to improve student outcomes. Translate standards into learning units and define assessment strategies. Collaborate with cross-functional teams to build and iterate on product features.

Computer Vision / Machine Learning Engineer to join R&D team focused on improving license plate recognition, vehicle detection, and parking occupancy systems. Develop, implement, and optimize deep learning models using Python. Must have strong Python programming skills, experience with machine learning models, and a software engineering background. Fluent Catalan and/or Spanish, with English at B2 level or higher.

Stock Controller needed for a 6-month fixed term contract in central Madrid. Manages stock levels, deliveries, and cycle counts. Requires 2+ years experience in luxury fashion, strong organizational skills, and proficiency in stock management systems.

Provides comprehensive administrative support to executives, including calendar management, meeting coordination, communication support, travel arrangements, and project assistance.

The Planning Sr Manager develops demand and supply plans for all EU channels, guiding planners and ensuring alignment with seasonal strategy. This role requires strong analytical skills, cross-functional collaboration, and experience in a seasonal industry.

Quality Engineer needed for a major civil engineering project in Madrid. Develop and maintain quality plans, conduct audits, and support site teams in ensuring compliance with ISO 9001 standards. Fluent in Spanish and English required.

Senior Risk Analyst will supervise and coordinate the payments and fraud operations team, analyze risks related to payment methods, identity verification, and gaming behavior, and propose process improvements. Requires 3-4 years of experience in risk, fraud, payments, or KYC roles, strong analytical skills, and fluency in Spanish and English.

Support & Implementation Specialist for international software development company. Implement, configure, and support digital solutions for government clients. 3+ years of experience in software support, implementation, or technical consultancy. Strong SQL and .NET knowledge required. Fluent English.

AI Technical Business Analyst needed to bridge business and engineering teams for internal AI tooling. Analyze business processes, translate needs into technical requirements, and drive adoption of AI-driven automations. Requires 5+ years of business analysis experience, 2+ years in AI/data/automation, and hands-on experience with AI-assisted documentation tools.

The B2B Events Marketing Manager will design, execute, and optimize the marketing strategy for European Blockchain Convention events. This role will own the customer journey for sponsors and attendees, drive audience growth and ticket sales, and collaborate with cross-functional teams.

Deploy cutting-edge ML/LLM models to Fortune Global 500 clients. Employ automation tools to enhance ML/LLM processes. Establish monitoring systems to track model performance and address issues. Collaborate with Product, DevOps, and research teams to optimize model performance. Manage cloud infrastructure for Large Language Model workloads.

Clinical Research Coordinator to support a clinical research site in Toledo. Part-time (20-24 hours/week) until September 30, 2026. Responsibilities include study documentation, patient support, data management, and communication. Bachelor's degree in life sciences or equivalent experience required.