hr English-speaking jobs in Castelló de la Plana

Marketing Copywriter will translate brand and marketing strategy into clear, compelling copy across channels. Responsibilities include writing and editing website pages, campaigns, emails, and product launches. Must have 3-5 years experience as a Marketing Copywriter in tech, SaaS, or agency environments and a portfolio demonstrating strong execution across multiple formats.

Postdoctoral Researcher position at CIC biomaGUNE, funded by the BREATH MSCA Postdoctoral Program. Project focuses on host-pathogen interactions, bacterial phenotype analysis, and molecular reconstitution.

Mobile Developer to design, develop, and maintain hybrid mobile applications using Ionic. Requires 3+ years of experience, proficiency in Ionic Capacitor, and B2 English. Collaborate with designers, QA, product, and backend teams.

Quantitative Researcher to design, analyze, and refine systematic trading strategies focused on derivatives. Requires experience with derivatives, equity trading desks, volatility, Greeks, and risk management. Strong Python skills and experience with large market data sets are essential.

PHP Backend Software Engineer to build and evolve scalable platforms. Requires 5+ years of PHP & Symfony experience, REST APIs, DDD, TDD, Docker, Kubernetes, and AWS.

Junior Full-Stack Developer will build features for a production-ready platform using Next.js and Node.js. Collaborate with founders and senior engineers on LLM orchestration, infrastructure, and data velocity solutions.

Senior Frontend Developer needed for groundbreaking projects in the aviation industry. Develop and implement innovative Airport Management solutions using Angular, TypeScript, and RxJS. Collaborate with backend developers, architects, and QA.

Qt Developer to join the iLovePDF Tech team. Maintain and improve the desktop application for Windows and macOS using Qt, QML, C++, and PDF/image processing libraries. Requires 3+ years software development experience, 1+ year Qt experience (including Qt6 and QML), strong C++ and Javascript skills, and experience with Git, CI/CD, and GitHub Actions. Fluency in English and EU citizenship or valid work permit required.

Designs, builds, and operates low-latency, real-time text and voice agent systems. Implements multi-agent orchestration patterns and applies advanced reasoning methods. Leads RAG engineering with strong grounding, evaluation, and observability. Drives evaluation-based development with monitoring, tracing, and CI/CD gating. Ships production-grade Python services using FastAPI under strict latency and quality requirements.

Experienced Sales Manager to lead and manage a real estate team in Marbella. Minimum 5 years of proven experience in real estate sales management, specifically in the Marbella market. Fluent English required, Spanish is advantageous.

Sales Engineer to identify and develop business opportunities for an international company specializing in automation solutions. Requires a technical background, strong commercial acumen, and experience managing complex projects.

Finance-driven professional to join PPG's Global Finance Transformation team. Maintain and review key Finance Master Data, support the design and governance of the CIM, and ensure data consistency across regions and business units. Bachelor's degree in Finance, Accounting, Economics, or Business Administration required.

Junior Software Developer to assist in the development and maintenance of internal applications. Support IT team with programming, testing, and documentation. Requires 1 year of experience and knowledge of C#, Java, HTML, CSS, Javascript, SQL, and Git. Interest in ERP systems is valued.

Sales Assistant to contribute to store turnover and customer satisfaction. Achieve sales goals, present products, identify customer needs, and build customer loyalty. Experience in luxury sales and customer service required. Fluent Spanish and English.

In-house lawyer for a multinational chemical company. Provides legal support to Spanish subsidiaries, drafts legal documents, and collaborates with internal stakeholders. Requires a Master's degree in Law, 4-5 years of experience, and fluency in English.

The Channel Manager will design, develop, and manage the brand's dealer and distribution network across Spain. Responsibilities include recruiting dealers, implementing operational standards, and ensuring the network meets sales targets.

Electrical Engineer with 4-5+ years of experience needed for international substation and MV/LV installation projects. Must have ETAP proficiency and fluent technical English.

Extraordinary seeks a Partnerships & Business Development Intern to help grow and manage partner relationships. The role involves identifying and reaching out to potential partners, building relationships, and supporting event execution.

Provides legal counsel and support for a variety of business operations, including contract drafting, negotiation, and review. Manages external legal counsel and provides legal analysis on dispute resolution and compliance matters.

Customer Service Admin Nordics needed for temporary maternity leave cover at Agilent Technologies. Requires previous customer service experience, advanced Nordic language skills (Danish, Swedish, Norwegian, or Finnish), and fluent English.