intern internship English-speaking jobs in Castile and León

Manage day-to-day bookkeeping, journal entries, and reconciliations. Support monthly, quarterly, and annual closings. Oversee accounts payable, receivable, and employee expenses. Ensure accurate coding of accounting entries and maintain organized financial records.

Manages the end-to-end supply chain for hardware, including procurement, inventory management, and logistics. Leads a team, optimizes workflows, and ensures data accuracy in the ERP system. Collaborates with finance on cost control and budgeting.

Lead the technical direction of the .NET development team, ensuring quality, consistency, and delivery predictability. Collaborate with Engineering Manager and Product Manager to design products, anticipate risks, and align technical and functional decisions. Establish engineering standards, review code, and ensure adherence to best practices.

Marketing & Go-to-Market Consultant will participate in B2B marketing strategy projects, leading diagnostics, identifying opportunities, and designing activation plans.

Provides executive and administrative support within the Purchasing Department. Ensures timely delivery of purchased goods, mainly raw materials and products for other departments. Manages purchasing operations, tracks orders, reviews product quality, and prepares purchase reports.

Senior Data Architect to support enterprise data modelling across conceptual, logical, and physical layers. Develop and review ER data models, ensuring alignment with enterprise standards and supporting harmonization of master and reference data structures.

Provide technical customer support for a leading renewable energy company. Support Dutch- and English-speaking customers with photovoltaic systems, inverters, modules, monitoring systems, storage solutions, and e-mobility technologies.

The GTM Engineer will build and maintain the technical infrastructure for outbound sales execution. Responsibilities include integrating data sources, automating lead routing, and managing sales engagement platforms.

Develop, deploy, and operate the WSQM E2E active service monitoring system. Ensure system availability, stability, and performance. Analyze and resolve errors, realize interfaces and data connections, and implement updates. Coordinate with internal and external partners for system integration and support.

The Customer Success Associate owns customer relationships post-sale, ensuring customer value realization. Responsibilities include onboarding, adoption support, product expertise guidance, and customer feedback collection.

Lead the development and optimization of postharvest products from concept to market launch. Analyze product performance, define roadmaps, and coordinate trials with customers and research institutions. Provide technical support, develop training materials, and conduct market research.

Medier seeks a CRM Executive to execute CRM campaigns, manage documentation, and ensure campaign accuracy. The role requires strong analytical skills, attention to detail, and proficiency in Google Workspace tools.

Provides administrative support to the Global Sales Team, including contract administration, lead validation, and order processing. Ensures accuracy and speed in all tasks, working closely with sales representatives, order management, and billing.

Senior Client Relations Agent to manage inbound inquiries from national and international clients via phone, email, and digital channels. Pre-qualify leads, reactivate client accounts, and collaborate with sales agents. Requires 2-4 years of experience in real estate or a related field, fluency in Spanish and English, and excellent communication skills.

The Grants Manager will lead the competitive grant management area, overseeing the full project life cycle. Responsibilities include identifying funding sources, analyzing grant guidelines, supporting researchers with applications, and managing project execution and closure.

Design Engineer with 3-5 years of experience in mechanical design needed. Responsibilities include developing components, creating technical drawings, and supporting design improvements. Must be proficient in Solid Edge or SolidWorks and have a B2 level of English. Requires regular travel to customer sites.

Leads and oversees structural analysis activities for UAV development, design, and certification. Establishes and applies structural analysis methodologies and tools, ensuring compliance with airworthiness standards. Collaborates with design, manufacturing, testing, and aerodynamics teams. Manages structural analysis projects and presents technical reports to stakeholders.

Global Development Analyst performs and directs assays according to GLP, cGMP guidelines and SOPs. Conducts research and development activities, including assay validations and new program initiation. Requires a Master's or Bachelor's degree in Biological Sciences or related field and 1-2+ years of experience. Fluent Spanish and working knowledge of English are required.

Senior Full Stack Developer (React / Next.js + Python) to join a strategic project for a leading aerospace company. Requires 4-5+ years of experience with React and Next.js, Python (FastAPI), AWS, Tailwind CSS, and RESTful APIs. Experience with testing frameworks, Scrum/Agile environments, and Git is also needed.

Integration Support Consultant needed for monitoring and resolving incidents in interfaces connecting SAP ERP and external systems within a pharmaceutical manufacturing environment. Requires 3+ years of demonstrable experience in a similar support service.