intern internship English-speaking jobs in Cartagena

Experienced Full Stack Developer needed for a 6-12 month contract. Develop and maintain web applications using React and Node.js. Must have AWS Cloud Development Kit experience. Fluent in Spanish and English (C1 level).

Senior Manager – BCG Vantage, Credit Risk will deliver against client and commercial priorities for Credit Risk Management. This role involves consulting with case teams, managing assets, IP, tools, and team processes. Responsibilities include growing and deploying a team of experts, driving the Intellectual Property (IP)/content agenda, and ensuring team performance across key performance indicators. The ideal candidate will have 5+ years of consulting experience in Banking/Finance or 7+ years of industry experience with a minimum of 2 years in a second line function focused on Credit Risk processes. Experience in design, development, and implementing credit risk models is required. Fluency in English and German is essential.

Senior Sales Controller to analyze sales performance, manage trade budgets, and ensure accurate reporting. Collaborate with sales, supply chain, and finance to forecast and optimize profitability. Requires experience in controlling activities, financial planning, and sales controlling.

QA Intern to join Product team ensuring quality of web applications, mobile apps, and backoffice tools through manual testing. Collaborate with product managers, developers, and stakeholders to validate new developments and catch issues early.

The Ocean Export Specialist processes shipments and related activities for assigned accounts. Responsibilities include preparing documentation, tracking cargo, and communicating with clients, carriers, and internal personnel.

Business Development Manager to drive global sales and partnerships for high-quality enzymes. Requires 7+ years of experience in life sciences sales, proven track record of revenue growth, and technical knowledge of molecular biology and enzymes.

Mechanical Design Engineer to contribute to the design and development of mechanical systems, from concept to validation.

Marketing Manager to develop and execute marketing strategies for the Spanish and Portuguese markets. Drive brand awareness and customer acquisition through multi-channel campaigns, analyze market trends, and manage paid media. Collaborate with cross-functional teams and local partners.

The Showroom Specialist assists with daily operations in the Cosentino City showroom, providing customer service, coordinating events, and visiting customer accounts. Responsibilities include generating sales leads, developing relationships with design firms, and supporting the sales team. The role requires 2+ years of sales experience and 1+ year in a retail showroom environment.

Project Document Admin & Controller supports Renewable Fuel projects in the Netherlands. Responsibilities include document control system management, document creation and processing, distribution and archiving, quality and compliance, collaboration and communication, and project schedule control.

Technical Support Specialist providing phone and email support to retailers for a luxury automotive brand. Responsibilities include guiding retailers through software, managing orders, and coordinating hardware setup. Native or bilingual Dutch and advanced English required.

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.

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.

Senior Project Manager to lead medium to large-scale investment accounting & administration projects. Requires 10-15 years of experience managing multi-functional, multi-geography projects in financial institutions, 3+ years with scrum/agile methodology, and fluency in English.

Senior Designer (UI/UX & Branding) needed for international creative agency in Barcelona. Shape design direction, deliver high-quality interfaces, and collaborate on projects for international clients. Must have advanced Adobe Creative Suite knowledge, 4+ years of website/app design experience, and strong UX/UI skills.

Junior Regulatory Affairs Officer supports smooth logistics and compliance across European markets. Prepares, reviews, and submits regulatory documentation, verifies product details, and communicates with authorities.

Supervises daily operations of Housekeeping functions in accommodation, public, crew, or pool areas. Provides support to Assistant and Housekeeping Managers. Requires one year supervisory experience in a large hotel or cruise line, managing a team of 10+ employees. Extensive knowledge of cleaning techniques, chemical handling, and safety procedures is necessary. Proficiency in computer skills and relevant software is required. Good English language skills are mandatory, Spanish preferred.

Animator & VFX Artist to create 2D and 3D animations and real-time VFX in Unity for gameplay and UI. Collaborate with teams to ensure responsive and readable interactions.

AYES seeks an Engineer with experience in energy (Oil & Gas, industrial processes, infrastructures) for projects in process, piping, civil, or mechanical engineering. Requires a university degree in a relevant field, previous energy sector experience, native-level Chinese, and good English.

Senior Manager – BCG Vantage, Credit Risk will deliver against client and commercial priorities for Credit Risk Management. This role involves consulting with case teams, managing assets, IP, tools, and team processes. Responsibilities include growing and deploying a team of experts, driving the Intellectual Property (IP)/content agenda, and ensuring team performance across key performance indicators. The ideal candidate will have 5+ years of consulting experience in Banking/Finance or 7+ years of industry experience with a minimum of 2 years in a second line function focused on Credit Risk processes. Experience in design, development, and implementing credit risk models is required. Fluency in English and German is essential.