backend developer English-speaking jobs in Extremadura

Project Engineer responsible for site surveys, construction drawing reviews, and material management for overseas projects. Provides technical guidance to installation teams, ensures project completion on time and to quality standards, and serves as a technical liaison between clients and internal teams. Delivers product training and provides on-site support.

MuleSoft Developer needed for a 12-month contract to design, build, and optimize enterprise-grade APIs and integrations across cloud and on-prem systems.

Project Researcher Engineer to design, execute, and manage experiments focused on in vitro protein biochemistry, purification, reconstitution, and engineering. Responsibilities include cloning, protein expression, purification, characterization, and laboratory management.

Senior Backend Developer will design, develop, test, deploy, and maintain software using a JVM language and Spring Boot in large-scale production systems. Experience with relational and non-relational databases, preferably Postgres, and AWS is required.

Business Development Manager to lead growth in the Iberian region for Commercial & Industrial and residential energy storage. Develop and implement business strategies, identify new opportunities, and manage projects from lead generation to execution. Requires 5+ years of experience in energy storage, battery systems, or renewable energy, fluency in English and Spanish, and proven negotiation and project management skills.

Public Tender and Customer Service Specialist needed for multilingual team in Barcelona. Responsibilities include tender quote creation, order management, and resolving customer issues throughout the quote to cash process. Requires native-level German, 2+ years of customer service experience, and strong communication and problem-solving skills.

Provides technical support for industrial automation systems, diagnosing issues, performing maintenance, and assisting with installations. Requires a bachelor's degree in a related field, experience in industrial automation, and knowledge of control systems and industrial networks.

Leads, coordinates, and supervises pharmaceutical development projects outside Spain and with external partners. Ensures quality development and technology transfer of solid oral and semi-solid dosage forms. Manages formulation, analytical, and process development activities, ensuring compliance with regulatory requirements and project deadlines.

Provides clients with sample shipment instructions, schedules pickups, and monitors shipments from origin to delivery. Resolves logistics issues, communicates with clients, and ensures compliance with regulations.

Supports global platform for managing, approving, storing, and sharing promotional and medical content. Responsible for user and task management, support ticket management, and data remediation tasks. Requires fluency in English, knowledge of SQL, and experience with Veeva, Vault, or MyServices.

Mechanical Commissioning Lead will manage all mechanical commissioning activities for a high-profile project in Madrid. Responsibilities include leading contractors, reviewing documentation, witnessing inspections, and ensuring systems are fully operational.

Java Developer to build and maintain components within a Calypso-based ecosystem. Support functional and technical teams in the evolution of trading and risk processes. Junior profile with strong Java foundations and a solid understanding of Java (OOP, collections, multithreading basics).

Data Modeller needed to design scalable data models for an insurance client. Responsibilities include translating business requirements into data models, defining data standards, and collaborating with business and technical teams. Requires experience in dimensional and transactional modeling, data modeling governance, and English proficiency (B2+/C1).

Sales Representative to build the Polish market for a leading European fitness company. Responsibilities include sales, customer care, website management, and operational follow-up. Fluent Polish and professional English required.

Data Architect to design and implement data-driven solutions. Define functional and technical data architectures, contribute to project documentation, and collaborate with IT teams.

The Data Technical Lead designs, implements, and ensures quality assurance of data solutions within a specific business domain. This role bridges enterprise data architecture and operational delivery, ensuring data initiatives are well-designed, implemented, scalable, and aligned with business needs. Responsibilities include technical design, implementation, and quality control of data solutions, including the evolution of the Data Lake.

As a Customer Success Representative, you will manage a portfolio of 200+ SaaS accounts, ensuring customer engagement, support, and retention. You will utilize HubSpot and internal playbooks to track customer health, resolve issues, and contribute to knowledge bases.

Senior Accountant needed for growing global healthcare company. Manage statutory and tax accounting, perform daily accounting activities, and prepare tax filings. Collaborate with business partners and support accounting policy development.

Experienced Journalist needed to create breaking AdTech news stories for a B2B media platform. Responsibilities include writing, editing, SEO optimization, and collaborating with team members. Must have 5+ years of B2B digital journalism experience and a deep understanding of AdTech and MarTech trends.

Content Editor needed to manage campaigns, create and publish content across multiple platforms, and collaborate with cross-functional teams. Requires at least one year of experience in content creation and campaign management, familiarity with CMS platforms, and strong communication skills in Spanish, English, and German (minimum B2 level).