intern internship English-speaking jobs in Cartagena

As a Key Account Manager, you will develop and maintain relationships with key clients, deliver presentations, and collaborate with internal teams to ensure client satisfaction. You will be based in Barcelona, covering Spain and Portugal.

Supply Chain & Packaging Engineer to design and implement efficient solutions for industrial projects, ensuring safety, quality, and cost optimization.

The Global Brand Experience Coordinator will plan, execute, and close projects, ensuring they meet quality standards and deadlines. Responsibilities include project planning, creative development, implementation guide creation, and cross-functional collaboration.

Full-time Spa Manager and Therapist needed for a 5-STAR RESORT in Mallorca, Spain. Responsibilities include managing daily spa operations, providing treatments, ensuring client satisfaction, and overseeing staff. Proven spa management experience, customer service skills, and skincare treatment proficiency are required.

Senior Physicochemical Laboratory Technician will plan laboratory activities, ensure compliance, manage personnel, and guarantee accurate results. Requires a university degree in Chemistry, Biochemistry, Biology, or Biotechnology and at least 7 years of experience with GMP regulations, analytical methods, and managing a technical team.

Senior Digital Architect needed to define and communicate technology vision for product-related business capabilities. Develop technology strategy and roadmap, ensuring architecture adapts to evolving needs. Design high-level solution architecture, covering all components and addressing people, process, technology, and data.

Drive growth across Iberia and the South of France by developing customer relationships and uncovering business opportunities. Lead sales activity, support distributors, and build long-term partnerships. Identify and develop new business opportunities using Scott Bader's product range.

Finishing Process Expert responsible for creating, implementing, and adhering to finishing standards. Develops and optimizes solutions, analyzes product and tool feasibility, and resolves technical issues. Collaborates with cross-functional teams and supports new project development. Requires 5+ years of experience in finishing technologies, project management, and CAD software.

The Business Development Manager New Products EMEA drives commercial success for new products across the region, managing the end-to-end business development cycle from market readiness to scale-up.

Develop and execute international sales strategies for coco-peat substrates. Identify and grow new markets, distributors, and strategic partners. Manage and expand relationships with existing international clients.

Industrial robotics and tooling engineer to manage and lead the industrialization of new industrial means for A320, A330, and A350 aircraft. Responsibilities include technical leadership, support to maintenance and production, and managing supplier relationships. Requires a degree in Aeronautical or Industrial Engineering and at least 5 years of experience in J&T or Automation&Robotics.

Senior Data Scientist to develop and implement optimization algorithms for complex problems. Requires proficiency in Python, data science libraries, and optimization-focused libraries. Must translate business needs into mathematical models and collaborate with cross-functional teams.

Maximizes revenue and yield through analysis, competitive analysis, and pricing strategies. Manages revenue reporting, forecasting, and inventory control. Collaborates with teams to establish business needs and improve performance. Requires 2-3 years of revenue management experience in the hospitality industry and proficiency in Excel and PowerPoint.

The Reservations Manager leads and trains a multilingual Reservations team, ensuring premium service standards and maximizing revenue through consultative selling. The role involves managing the sales funnel, analyzing KPIs, and preparing strategic reports.

The Technical Superintendent oversees technical aspects of Fraser-managed superyachts, ensuring compliance, maintenance planning, and performance monitoring. The role involves collaboration with captains, crew, shipyards, and suppliers to maintain safety and operational excellence. Requires a marine technical background, experience managing projects, and strong communication skills.

IAM Developer to design, implement, and customize Keycloak infrastructure. Responsibilities include securing microservices, managing authentication flows, and extending Keycloak functionality via custom SPIs. Requires expertise in Keycloak configuration, OIDC, OAuth 2.0, SAML 2.0, and custom Java extensions.

Crazy Pizza seeks talented chefs (Chef de Partie, Pizza Chef, Sous Chef) for its 2026 summer season. Previous restaurant experience, strong culinary skills, and a passion for high-quality food preparation are required.

Accountant responsible for monthly, quarterly, and annual closings, financial statement preparation, payment processing, tax filing, and intercompany transaction analysis. Requires a finance or accounting degree, 3+ years experience, SAP proficiency, and strong analytical skills.

CRM Manager will design, test, and deploy automated workflows, manage user onboarding and data cleansing, and analyze customer data to identify upsell and cross-sell opportunities.

Computational Biologist to develop bioinformatics and systems biology pipelines for microbiome data integration. Analyze metagenomics and single-cell RNA sequencing data to understand human-microbiome interactions in reproductive health.