intern internship English-speaking jobs in Cartagena

Accelerating the Energy Transition, One Algorithm at a TimeTetraxAI is revolutionizing renewable energy infrastructure development, making it 100x faster and 10x cheaper through cutting-edge B2B SaaS powered by AI.

* Before applying for this role, please note that this job must be performed in Spain. Only candidates currently residing in Spain or willing to relocate will be considered. Are you ready to be inspired, challenged, motivated to do your best, and have fun while you're at it?

Please do not apply if you have already applied through our partners. REGEMAT3D, a global leader in 3D bioprinting, advanced regenerative medicine technologies and biofabrication systems. REGEMAT3D integrates hardware, software, biomaterials and scientific expertise to accelerate the creation of next-generation tissues and therapies.

About the Company My client is a well-established, international B2B technology business operating in a subscription-based model, supporting enterprise customers across multiple European markets. The company is in a period of continued scale and professionalisation, with a strong focus on customer outcomes, long-term partnerships, and sustainable revenue growth.

We're seeking a talented Business development manager (CORPORATES) to join our team at our office in Sant Cugat del Vallès, just outside of Barcelona.

At E-Frontiers, we're looking for a Fullstack Developer with approximately 5 years of experience to join a product-driven company based in Ireland. You will work remotely from Spain, with occasional visits to their Dublin offices. Responsibilities Develop modular and scalable Angular and Node. js components for the Fusion platform, ensuring maintainable and testable code.

Company Overview: MN8 Energy is one of the largest independent solar energy and energy storage owner-operators in the U. S. , serving enterprise customers with clean energy and complementary solutions, such as battery storage and EV Charging, to enable an electrified, decarbonized world.

At Lexroom. ai, we set the bar for legal AI—clear, fast, and built for trust. In just a few years, what began as an idea has become a reliable platform adopted by thousands of legal professionals across Europe. Our mission is clear: make the law faster, clearer, and more reliable, giving lawyers, law firms, and companies the time and confidence to focus on what truly matters.

Job description: NTT DATA is seeking a passionate Manager Data Scientist to bridge the gap between pure commercial business needs and cutting-edge analytical engines, establishing a connection between business areas and our team of data scientists. We're looking for an artificial intelligence expert to drive data-driven business strategies.

This key role will lead the mechanical and thermal design of satellite platforms and contribute to the evolution of advanced space systems. The ideal candidate will be responsible for ensuring structural and thermal reliability ,supporting system integration, and driving innovation in mechanical and thermal performance for space applications.

Contract Opportunity - Remote/Hybrid - Spain We are looking for an experienced consultant to engage directly with end customers on SAP PC3 ECS environments. This role is critical in driving customer delivery timelines, managing vendors and escalations, and coordinating cross-functional teams to ensure successful end-to-end delivery.

We are the largest chain of ortho clinics with fully digital processes. We have revolutionized the invisible orthodontic sector with the best team of professionals specialized in making people smile and using the latest technology for the diagnosis, treatment, and follow-up of all cases.

The project is all about bringing your talent and ambition to a fast-growing and innovative company that is revolutionizing the trade of raw materials for the human and animal nutrition industries, as well as the healthcare sector worldwide.

Your mission Our company is growing, and we are looking for a Java Developer (M/F) to join our team in Madrid. Working closely with our client's services and team members in Spain and France, you will work on PLM projects in the aerospace industry. Under the responsibility of a project manager, within an expert team (Solution Architect, Technical & Functional Leaders, Developers. . .

To strengthen our Commercial Affiliate in Spain, we are currently hiring 2 Key Account Manager (m/f/x) – Immunology/Rare Diseases To cover either the North or the South of Spain - ideally located in Galicia/Zona Norte OR Alicante/Valencia (Fulltime / permanent/ fully remote) The Opportunity As a Key Account Manager in our Spain Commercial Affiliate, reporting to the Business Unit Head, you will

With a focus on creating wearable pieces of art, the brand aims to offer an unforgettable experience to its global clientele. Their new Digital Sales Advisor will report directly to the Founder and CEO.

Huawei invests heavily in basic research, concentrating on technological breakthroughs that drive the world forward. With more than 208,000 employees, that operates in more than 170 countries and regions. Huawei is looking for a Telecommunications Engineer Intern to join their team in Madrid. Responsibilities: Understand the operation of the AMS department.

We are Plexus Tech, a technology company with more than 5,000 professionals developing innovative products and services that improve the lives of people and companies. We are committed to developing talent and integrating junior profiles into the heart of our most innovative projects.

At T-Systems, you will find groundbreaking projects that contribute to social and ecological well-being. We want to welcome new talents like you, who bring fresh ideas, different points of view, who accept challenges and continuous learning, to grow and impact society. . . All this, in a fun way! It doesn't matter when or where you work.

At Alstom, we understand transport networks and what moves people. From high-speed trains, metros, monorails, and trams, to turnkey systems, services, infrastructure, signalling and digital mobility, we offer our diverse customers the broadest portfolio in the industry.