react English-speaking jobs in Valladolid

Experienced Blender 3D Artist needed for short-term contract (1-3 days) in Madrid. Apply adjustments to existing 3D models and animations, render final scene. Must have mid to senior level Blender experience and be available to start immediately.

Design & Marketing Assistant needed for a dynamic company with four diverse brands. Responsibilities include graphic design, social media content creation, and marketing execution. Must be fluent in English and Spanish, proficient in Adobe Creative Suite, and have strong copywriting skills.

Business Developer to drive growth and expand market presence in Spain and Portugal for a smart charging and energy management company. Focus on identifying new clients, building relationships, and promoting solutions across residential, commercial, and B2B channels.

Sales Assistant supports store targets by providing excellent customer service and driving sales. Responsibilities include assisting customers, processing transactions, maintaining store appearance, and collaborating with the team. Requires 2-5 years of experience as a sales assistant in a fashion brand.

Manages institutional-grade execution of crypto transactions, including spot and derivatives, with a focus on cost control and slippage benchmarks.

This 6-month traineeship offers hands-on experience in maritime operations for a motivated individual. The role supports the local operations team and requires fluency in Spanish and a valid work permit/visa for Spain.

Leads cybersecurity technical domain for aircraft and systems, analyzing risks and mitigation strategies. Participates in technical discussions with stakeholders and interfaces with systems engineering teams. Develops and delivers internal cybersecurity training. Defines new cybersecurity standards for aviation.

Senior Carbon Trader specializing in EU Emissions Allowances (EUAs) with 5+ years of experience generating consistent P&L within the EU ETS.

As a Customer Support Executive, you will be the primary point of contact for customer and supplier support, resolving queries efficiently and adhering to service level agreements. You will manage tickets, track customer issues, and collaborate with internal teams to ensure a seamless service experience.

Develops and tests advanced ion, electron, and atomic beam sources. Designs and validates plasma discharge systems. Operates and integrates laboratory test and measurement equipment.

Lead the development of ruggedized OpenVPX computing platforms, integrating backplanes, Ethernet switches, and GPUs. Manage a team of engineers, ensuring VPX modules meet Aerospace and Defense application requirements. Drive process evolution and verification roadmaps to maintain a cutting-edge hardware ecosystem.

Senior Java Software Engineer to design, implement, and maintain Spring Boot services for ingesting and processing event-driven data. Experience with Java 21, Spring Boot 3.x, Docker, AWS Kinesis, and PostgreSQL required. Must be able to provide 6 hours overlap with US Central Time.

Java Back-End Developer to design, develop, and maintain scalable microservices for a retail client. Responsibilities include developing REST APIs, implementing event-driven architectures, and working with relational and non-relational databases. Requires 2-5 years of experience with Java, Spring Boot, and API development.

Functional Consultant (M/F) to join a growing team in Madrid. Work on PLM projects in the aerospace industry, converting customer needs into functional specifications. Requires security clearance and client site presence.

Senior Medical Science Liaison needed to support Phase 2 clinical trial enrollment and success. Develop strategic enrollment plans, cultivate relationships with neurology healthcare professionals and KOLs, and deliver scientific and educational data. Requires an advanced degree in medical science and 7+ years of experience, with a focus on neurological disorders, preferably Parkinson's disease.

Customer Experience Specialist will lead follow-up and support calls with prospective customers, representing a premium automotive brand. Responsibilities include reinforcing brand value, identifying customer concerns, and collecting insights to support sales teams. Must be bilingual in Flemish and English with experience in customer service or sales, ideally within the automotive or luxury sectors.

Senior Front End Developer will design, develop, and maintain responsive web applications using React.js or Next.js 15, incorporating charting libraries for data visualization. Collaborate with UI/UX designers and backend developers to ensure seamless user experience and optimize application performance.

DevOps Engineer to operate and enhance Snowflake or Databricks platforms across Azure and AWS. Automate deployments, ensure secure connectivity, and optimize platform performance. Requires strong cloud engineering, scripting, and CI/CD pipeline experience.

Founding GTM for Uptail, a company building AI agents for B2C sales. Own the entire sales funnel, build a pipeline of qualified leads, and close deals across Spain and Europe. 2+ years of B2B sales experience required. Fluent in Spanish and English.

Customer Service Agents provide support to customers via phone, email, chat, and other digital channels. They resolve issues, ensure customer satisfaction, and contribute to service quality improvement.