customer service English-speaking jobs in Jaén

Theoretical Physicist specializing in Atomic, Molecular, and Optical physics needed to develop models, simulations, and analytical insight for quantum and optical systems.

Technical Sales professional supporting the Sales team in converting prospects to clients. Provide product expertise, configure demos, and assist with RFP responses.

Water Engineer needed for industrial projects in metals and minerals. Responsibilities include hydraulic modeling, design, and analysis of water systems. Requires a Bachelor's degree in a relevant field and 4+ years of experience.

Drive commercial expansion for H2SITE by identifying and pursuing opportunities in industrial and industrial gases sectors. Develop sales strategies, prospect customers, and present hydrogen separation solutions.

This Sales Manager position reports to the Sales Director and is responsible for generating and maximizing sales of real estate products. The role involves building client relationships, managing sales transactions, and attending industry events.

Drive growth for international companies in Spain as a Swedish-, Norwegian-, or Danish-speaking Account Executive. Manage the full sales cycle, develop customer relationships, and deliver tailored advertising strategies.

International Sales Manager oversees day-to-day international sales activities, driving revenue across multiple markets. The role involves managing a team, developing sales strategies, and building relationships with international clients.

We are seeking a Business Analyst to bridge the gap between business stakeholders and technical teams. The ideal candidate will have experience in API design, data model mapping, system integration, and database technologies.

Build pipeline for Czech & Slovak B2B accounts from Barcelona. Engage target accounts through multichannel outbound (phone, email, LinkedIn), qualify opportunities, and hand over SQLs to Sales. Fluent Czech/Slovak (C2) and strong English (C1) required.

NTT DATA seeks a Manager Data Scientist to bridge business needs and AI solutions. Lead teams of data scientists applying machine learning and deep learning to solve real-world problems. Requires 5+ years of experience in advanced analytics and data science within relevant industries.

Medical Doctor specializing in integrative medicine and therapeutic fasting. Provides individualized care, oversees fasting processes, and collaborates with a multidisciplinary team.

Support strategic consulting projects for pharmaceutical, biotech, and med tech companies using AI-driven solutions. Translate business problems into AI solutions and communicate technical approaches to non-technical stakeholders. Design and build Python-based data pipelines and automated workflows.

Supports the Quality Management Manager in implementing quality systems, ensuring compliance with food safety standards. Manages quality assurance processes, conducts audits, and contributes to continuous improvement initiatives.

Think Ahead Academy seeks a Maths Teacher to deliver engaging IGCSE and A-Level lessons in a small-class setting. Must have a Bachelor's degree in Maths, Engineering, or a related field and at least one year of IGCSE teaching experience. Native or advanced English proficiency is required.

Senior Project Manager oversees a single project, sets daily production reporting methods, and reviews important data. Conducts PM level interviews and hiring decisions. Meets with clients for project updates and addresses project issues. Initiates process changes and improvements. Requires a college degree, project management experience, and proficiency in Microsoft Office 365.

Senior Engineer will lead the technological evolution of payment card production systems, modernizing existing lines and developing new equipment. Responsibilities include automating production lines, partnering with suppliers, and integrating legacy equipment with the Manufacturing Execution System (MES). Requires 10+ years of experience in smart card manufacturing, automation projects, and supplier selection.

Concept Validation Engineer to analyze designs, prototypes, and ensure compliance with technical, functional, and homologation requirements.

Lead Product Designer to define and evolve product design principles for a fast-growing B2B SaaS company. Design scalable systems and transform complex logic into intuitive product experiences. 6+ years of experience designing complex digital products, ideally in B2B SaaS environments. Proven expertise in designing high-density, data-heavy interfaces with strong information architecture skills.

Innovation Manager will lead end-to-end product development, from concept to launch, across functional nutrition categories. Responsibilities include identifying market opportunities, collaborating with commercial and marketing teams, and ensuring technical feasibility and commercial alignment.

Lead Electrical Engineer to manage high-impact PV and battery storage projects in Spain and Central/South America. Develop and review substation and BESS designs, ensuring compliance with standards and client requirements. Lead projects from conception to completion, coordinating with cross-functional teams. Requires 5-7 years of experience in substation and BESS design, proficiency in electrical design software, and fluency in Spanish and English.