intern internship English-speaking jobs in Cartagena

Senior backend engineer to design, develop, and operate software services within cross-functional teams. Responsibilities include writing clean code, designing domain-driven systems, practicing DevOps, mentoring team members, and leading architectural decisions. Experience with NoSQL databases, modern software development practices, and a higher-level programming language is required.

Provides onsite technical support, troubleshooting hardware and software issues. Manages user accounts, installs equipment, and coordinates with vendors. Requires 5+ years of experience, ITIL V3 Foundation Certification, and advanced MS Office 365 skills.

Lead and coordinate multi-disciplinary engineering teams across battery systems, electric propulsion, mechanical, electrical, and systems domains. Drive hands-on development, prototyping, and early-stage industrialization. Translate strategic objectives into executable engineering plans.

Project Documentation Intern will assist in organizing, classifying, and archiving project documentation. Responsibilities include maintaining document registers, coordinating with project engineers, and supporting documentation packages for audits.

Leads specific Supply Chain projects, including system deployments and data structure implementations. Develops and implements commercial and factory-based projects to meet business needs. Partners with the Head of Supply Chain to define and drive the Supply Chain Transformation strategy. Establishes, leads, and manages the Supply Chain PMO, setting governance framework and reporting standards. Drives the planning, execution, and delivery of strategic supply chain initiatives in Europe.

Drive commercial expansion for a biotech company developing a liquid biopsy platform. Identify and develop relationships with pharma, biotech, and CRO partners globally. Position the platform as a solution for MRD and ctDNA detection, treatment response monitoring, and companion diagnostics.

Senior PLM Application Engineer will configure, customize, and operate Teamcenter, integrating it with SolidWorks, EPLAN, SAP, and related systems. Responsibilities include analyzing engineering processes, implementing workflows, and providing user support. Requires a Bachelor's or Master's degree in Mechanical Engineering and 7+ years of experience with Teamcenter in a production environment.

Sales Account Manager to develop and manage a portfolio of B2B clients in Madrid. Promote and sell mobility solutions to corporate customers, build strong relationships, and achieve sales targets. Proven B2B sales experience and strong communication skills required.

Manages email marketing for a Barcelona-based brand, including e-commerce flows and B2B outreach. Requires experience with Klaviyo, email design, and cold outreach strategies.

Leads the operations of a glass microsphere manufacturing plant, ensuring safety, environmental compliance, and high-quality product delivery. Manages daily operations, production, and personnel, while developing and implementing strategic plans. Requires a university degree in engineering, 5+ years of relevant experience, and fluency in English.

Client Advisor needed for part-time position (20 hours/week) at the Madrid Las Rozas store. The role focuses on providing exceptional customer service, building client relationships, and driving sales. Proficiency in Spanish and English is required. This position is directed towards people with disabilities.

The Biorepository Technician will maintain, develop, and implement protocols within the Biorepository team. Responsibilities include sample reception, quality control, aliquot preparation, and data management. The candidate will work closely with the Biorepository Manager, team members, and the Head of the Sequencing Unit.

This role combines medical education and field medical support. Responsibilities include designing and delivering training programs for doctors, distributors, and internal teams, as well as building relationships with Key Opinion Leaders (KOLs).

FLUZO seeks a Sales Representative to develop and execute sales strategies for the UK market. The ideal candidate will have at least two years of B2B sales experience, preferably in advertising, and a network of UK advertisers and media agencies. Fluency in English and Spanish is required.

Leads the Toolchain Management department, defining and maintaining the DPF IT architecture roadmap. Oversees systems and tool integration, evaluates new technologies, and ensures system stability and scalability. Collaborates with R&D, sales, and operations teams to align technology with business needs.

Senior React Developer will develop, maintain, and optimize React-based front-end applications. Responsibilities include building reusable UI components, working with JavaScript and TypeScript, implementing testing strategies, and collaborating with cross-functional teams.

Bionet's STEM Excellence Internship Program offers a 6-month paid opportunity for outstanding students and recent graduates in STEM fields.

Own the end-to-end Adobe Experience Cloud activation for a BFS customer across AEP/RTCDP and AJO. Responsibilities include defining and maintaining the AEP/RTCDP blueprint, designing data schemas and ingestion pipelines, building audiences and journeys, and ensuring compliance with GDPR/ES.

Senior Embedded Software Engineer to develop firmware and software for intelligent soldering stations. Responsibilities include defining software architectures, developing firmware in C, and collaborating on hardware bring-up and debugging.

This is a fixed-term contract until July 2026 for a Machine Learning Platform Engineer to design, deploy, and operate production-grade machine learning and AI systems. Responsibilities include deploying models, building automated pipelines, and improving reliability and performance of ML services. Strong Python engineering background and experience running production services on cloud platforms are required.