intern internship English-speaking jobs in Cartagena

Provides administrative and financial support to US and Spain subsidiaries. Tasks include payroll, invoicing, account reconciliation, and client communication. Requires fluency in Spanish and English, strong attention to detail, and proficiency in Microsoft Office.

Production Planning Specialist will develop and maintain the annual production plan, analyze capacity, and manage MRP data. Requires a degree in Engineering or Science, strong analytical skills, and experience with ERP systems and production planning.

PhD Candidate to join a research project on endometriosis, focusing on personalized medicine and patient-derived organoids.

Machine Learning Platform Engineer to design, deploy, and operate production-grade AI systems. Responsibilities include building automated pipelines, running ML workloads on cloud platforms, and improving reliability and performance. Strong Python engineering background and experience supporting ML systems required.

Service Engineer needed for a leading luxury yacht shipyard. Maintain and repair yachts, troubleshoot technical issues, and install upgrades. Requires technical education, yacht service experience, and strong communication skills. Travel to client locations worldwide.

Senior Infrastructure Engineer to design and improve core infrastructure architecture across Azure, on-prem network, and security. Define standards, guardrails, and reusable patterns. Collaborate with internal teams and stakeholders to align technical decisions.

Manages partner relationships to achieve company bookings goals. Collaborates with cross-functional teams to develop joint value propositions and go-to-market plans. Drives deal registration, funnel creation, and pipeline development. Oversees channel partner relationships and conducts business reviews to track progress.

Assist waiters in providing guest service, table setup, and food & beverage assistance. Previous restaurant or hotel experience preferred. Fluency in English and basic food service knowledge required.

Thing or Two seeks a Junior Business Development Manager to identify, negotiate, and close deals with web brands, app developers, and suppliers. Responsibilities include managing the sales cycle, prospecting for new business, meeting KPIs, and collaborating with teams to achieve company objectives.

Telecommunications Engineer needed to provide expert support for AXON Networks products. Design, develop, and refine algorithms, troubleshoot, and collaborate with teams to deliver innovative network access solutions.

Experienced Application Security Architect needed to design and implement secure application architectures. Lead security reviews, advise development teams on secure coding practices, and translate technical security concepts. Requires 5+ years cybersecurity experience, 1+ year as a security architect, and experience as a software developer or penetration tester.

Bilingual Executive and Personal Assistant required for prominent sports figure in Madrid. Manage complex diary, travel arrangements, and household operations. Coordinate with global teams and act as a key point of contact. Proven experience as a Personal Assistant, ideally supporting an HNWI, is essential. Fluency in English and Spanish required, additional languages advantageous.

Production Engineer needed to apply Lean Manufacturing and Continuous Improvement concepts. Develop and maintain production plans, train personnel, and standardize production methods. Requires industrial engineering background, experience with Lean manufacturing, SAP, CAD/CAM, and quality tools.

Data Analytics & Reporting professional to drive data-driven decision making in the Commercial organization. Analyze data from internal and external sources using SQL, PowerBI, and Excel. Lead data tracks for projects, including exploratory data analysis, BI support, and proof-of-concept development. Deliverables include increased customer data completeness, accuracy, and consistency, customer 360 insights dashboards, and customer size classification models.

Digital Sales Associate fluent in Dutch with Inbound experience needed. Must have a sales aptitude, excellent closing skills, and be goal-oriented. Responsibilities include reaching sales goals, building relationships with potential clients, and cross-selling ADP products and services. Must be fluent in Dutch and English.

Short-term project (approx. 5 weeks) reviewing employee personnel files onsite at client locations. Requires fluency in English, accuracy, and confidentiality.

FXSTREET is looking for a Product Owner with a strong technical background who has built and operated web-based SaaS products in either B2B or B2C environments. This role is not for a “ticket manager” or a purely functional PO.

Key Account Manager will drive sales goals by promoting company products to healthcare institutions and key customers. Responsibilities include building relationships with stakeholders, implementing marketing strategies, and monitoring account performance.

Maximize sales and profit with existing product portfolio while supporting the introduction of new varieties. Responsible for customer relationships, plans, technical advice, and market data collection.

As a Commercial and Technical Advisor, you will accelerate Rockpanel growth in Spain through technical and commercial support to the local operating company. You will act as a liaison between Rockpanel and Rockwool Spain, ensuring alignment with stakeholders across sales, technical services, marketing, and application & development. You will translate local market needs into fit-for-purpose solutions, optimize specifications, and drive project success.