backend developer English-speaking jobs in Castile-La Mancha

Cell Mechanical Design Engineer oversees mechanical activities for battery cell development, including testing, modeling, and validation. Responsibilities include designing cell samples, ensuring manufacturability, and collaborating with engineers to mitigate system-related impacts. Requires 3 years of experience in the battery industry, a Bachelor's or Master's degree in engineering or Material Science, and proficiency in SolidWorks or equivalent software.

Lead cross-functional R&D project teams in the development of power electronics solutions. Manage project scope, budget, planning, and milestones. Ensure quality, timing, and successful releases. Collaborate with stakeholders, manage risks, and support product roll-out.

The Globe English School seeks an on-site English Teacher to deliver engaging lessons to students of all ages and levels. Must have C2 English proficiency, teaching experience, and a relevant teaching qualification.

Leads the bidding process for medium to high complexity PreFab Data Center projects. Prepares proposals, conducts risk assessments, and coordinates cross-functional teams. Analyzes RFQs, develops contract strategies, and supports negotiations. Requires a Bachelor's Degree in Engineering, 5+ years experience in infrastructure projects, and 3+ years in Data Center Solutions.

COMSER seeks a Qualification and Validation Technician for GMP Compliance Services. The role involves designing and executing validation protocols, analyzing results, and improving documentation. Requires a scientific-technical university education and full professional level English.

Leads client acquisition, manages onboarding process, and ensures regulatory compliance. Presents product solutions, guides clients through documentation, and coordinates with internal teams. Requires 3+ years of experience in client onboarding, strong communication skills, and understanding of KYC/AML regulations. Fluent English is required.

Assists in ensuring products and processes meet quality requirements through inspections, testing, documentation, and continuous improvement across laboratories and production stages. Provides guidance to staff on quality policies, processes, and best practices. Oversees internal audit processes, competency assessment, training, and other quality processes. Participates in the inspection of incoming materials, in-line production, and final products. Collaborates with stakeholders to provide analysis support for quality-related issues. Ensures availability and proper operation of test equipment. Maintains the calibration schedule of laboratory equipment. Coordinates and supervises outsourced testing results.

Client Advisor needed for Giorgio Armani Boutique in Puerto Banús for summer support (May-August). Provide excellent customer service, advise on collections, and build strong customer relationships. Minimum 3 years of fashion sales experience required.

Senior Optimization Scientist to design, develop, and implement optimization algorithms for a technology project in the aviation and travel sector. Will translate business needs into mathematical models and collaborate with cross-functional teams. Requires a Bachelor's or Master's degree in a related field and 3+ years of experience in optimization. Proficiency in Python and optimization libraries is essential.

Assistant Director of Food & Beverage to support the leadership and day-to-day management of F&B operations at METT Marbella – Estepona. Responsibilities include supporting the Director of F&B, ensuring guest satisfaction, collaborating with outlet managers, and upholding brand standards.

Leads, coordinates, and supervises pharmaceutical development projects outside Spain and with external partners. Manages formulation, analytical, and process development activities, ensuring compliance with regulatory requirements and project deadlines. Supervises a team, reviews project documentation, and drives technology transfer to the flagship plant in Spain.

Industrialization Manager will lead projects, including planning, scheduling, and coordination across departments. Responsibilities include managing investments in automation and analyzing production capacities. The role requires experience in injection molding, automation technologies, and team leadership.

Senior UHT Specialist needed for a leading nutraceutical manufacturer. Design, develop, and optimize UHT and thermal processes for specialized nutrition products. Lead pilot trials, industrial validations, and scale-up activities. Provide technical support and ensure regulatory compliance.

The Communications Director will shape and lead Bioiberica's corporate communications strategy, overseeing both internal and external communications across three Business Units: Human Health, Animal Health, and Plant Health.

Front Office Manager for a 4-star hotel in Roquetas de Mar. Manage and lead the Front Office team, ensuring guest satisfaction and operational continuity. Experience in reception at 4-star hotels, cost management, and team leadership required.

Project Engineering Manager needed to lead and coordinate engineering teams on projects. Responsibilities include ensuring technical quality, meeting deadlines, managing budgets, and coordinating with clients and vendors. Requires a Bachelor's or Master's degree in Engineering, 10+ years of experience, and strong leadership, communication, and negotiation skills.

TrinaTracker seeks a Structural Engineer to join their Madrid office. The role involves product development and integration, structural calculations for photovoltaic projects, and technical documentation. Qualifications include a degree in Mechanical Engineering or similar, English proficiency (B2 level), and experience with structural calculation software (Robot, Cype 3D, Consteel).

Innovation Lab Technician will oversee experimental R&D campaigns, ensuring accurate maintenance and calibration of measurement equipment. Responsibilities include gas testing, equipment adaptation, facility maintenance, and collaborating with other project disciplines.

The Planning Sr Manager develops and implements demand and supply plans for all EU channels. This role guides planners, ensures cross-functional alignment, and participates in key meetings to achieve company goals. The individual will also analyze data, track KPIs, and improve forecast accuracy.

AI & Automations Operations Intern will design, build, and scale AI-powered operational systems. You will support day-to-day operations, assist with merchant onboarding, and contribute to the creation of automations and AI-driven processes.