freelance English-speaking jobs in Castelló de la Plana

Provide inbound customer service in Dutch via phone and email for a client. Resolve customer inquiries, follow procedures, and escalate complex cases.

Bilingual Office Assistant to support a busy Private Equity/Investment Firm. Duties include managing communications, travel arrangements, meeting scheduling, office maintenance, and administrative tasks. Must be fluent in English/Spanish, possess a University Degree, and have 2+ years of relevant experience.

Salesforce Technical Lead needed for a Merkle & Dentsu company specializing in Customer Experience services. Provide technical support, design solutions, and ensure project success. 3+ years of Salesforce implementation experience required, including Sales Cloud, Service Cloud, and Marketing Cloud.

MIDAD Energy seeks a Senior Project Engineer with 10+ years of experience in Oil & Gas field development projects. The role involves leading the engineering and execution of surface facilities across the project lifecycle, coordinating multi-disciplinary teams, and ensuring project delivery within targets.

The Safety Engineer ensures compliance with H&S requirements during construction and installation activities. The role translates corporate policies into project-specific safety requirements and monitors contractor compliance with applicable laws and project documentation. The Safety Engineer leads on-site H&S supervision, coordinates with authorities and project teams, and escalates critical risks.

The Coordinator of Research Group Officers will support the deployment and consolidation of the Research Group Officer (RGO) model across ICFO. This role ensures structured interactions between Research Groups and Operational Teams, contributing to process standardization and operational clarity.

Senior Data Analyst will analyze game play data to inform product development, marketing strategies, and live operations. Responsibilities include extracting insights, optimizing marketing spend, building dashboards, and collaborating with cross-functional teams. Requires 4+ years of analytical experience, expertise in SQL and BI tools, and strong communication skills.

Lead global new business revenue growth for a leading multi-channel offline performance marketing company. Manage a team of SDRs and AEs, build enterprise pipelines across 14 markets, and execute a Land and Expand strategy.

Operations Director to oversee 2-4 luxury hospitality venues in Southern Spain. Responsible for operational excellence, guest experience, and team leadership across multiple premium sites. Proven experience in luxury hospitality operations and strong people leadership required.

Sales Account Manager specializing in polyolefins (PE/PP) to drive business growth and manage key accounts in the Iberian market.

Shape and scale DEKRA Digital Trust Services' Data Center TIC Services offering across cybersecurity, safety, sustainability, and system integrity. Define strategy, build a service portfolio, lead go-to-market activities, and establish a scalable delivery model. Lead a team, represent DEKRA externally, and translate offerings into service catalogues and delivery playbooks.

The Sales Manager – Travel Industry will position the property within the luxury leisure market and strengthen relationships with key travel industry partners. This role reports to the Director of Commercial and requires a Bachelor's degree, minimum 4 years of hospitality sales experience, and at least 3 years of experience handling high-end leisure for a 5* luxury property.

Experienced real estate agent needed to handle client viewings, negotiations, and transactions. Must have strong negotiation and closing skills, be organized, and fluent in English.

Senior Coordinator for clinical packaging and labeling operations. Ensures timely delivery of packaged clinical supplies for studies from Phase 1 to Phase 4. Manages outsourced activities, reviews documentation, and collaborates with external partners. Requires experience in clinical packaging, R&D, GMP, GCP, and GDP. Strong proficiency in digital tools and reporting systems.

Lead the development and execution of an AI-powered content production pipeline, from script to distribution. Produce and iterate on high-quality microdramas, experiment with generative video tools, and analyze performance to optimize output. Define the creative direction and visual style for a proprietary storytelling universe.

Business Development Manager (EU) will hunt and onboard new vendors and affiliates, focusing on direct response and performance marketing. Responsibilities include pipeline management, relationship building, and representing Digistore24 at industry events.

The Field Account On Trade will drive sales and develop strategic relationships with key customers in the assigned area. Responsibilities include implementing the Commercial plan, negotiating Point Sales, and identifying opportunities to maximize Bacardi's performance in the On Trade.

Administrative, Accounting & Sales Assistant needed for international contemporary art agency. Responsibilities include bookkeeping, financial reporting, sales administration, logistics coordination, and project support. Requires 3+ years experience in administration, accounting, or office management, strong organizational skills, and proficiency in Microsoft Office and accounting software. Fluent English and Spanish required.

Revelyst, an action sports company, seeks a creative Web & Graphic Design Intern (UI/UX focus) to support digital design initiatives and enhance the e-commerce experience. The intern will assist in creating digital assets, optimizing e-commerce site layouts, and collaborating with cross-functional teams.

CAD Designer intern to develop 3D models, technical drawings, and visualizations for a floating wind platform. Requires proficiency in SolidWorks and fluency in Spanish and English.