frontend developer English-speaking jobs in León

Affiliate Manager / Business Developer to manage and grow commercial relationships with gambling and finance brands. Negotiate deals, develop new revenue streams, analyze performance, and identify new partnerships.

HSE Officer needed for a large-scale industrial development in Huelva, Spain. Ensure safety, health, and environmental standards are met during construction and commissioning. Conduct inspections, manage permit-to-work systems, and coordinate with the client's HSE team. Previous experience as an HSE Officer on construction or industrial projects is required.

Experienced IT Technical Architect needed to design and develop secure, scalable, and resilient technology solutions. Will define target-state architecture, review technical designs, and lead architectural decisions. Requires strong experience across infrastructure, systems architecture, integrations, and enterprise technologies.

Bofill Taller de Arquitectura seeks architects with expertise in façade systems, building envelopes, and construction detailing for large-scale international projects. Candidates should bridge design intent with technical execution, coordinating with architects, engineers, and contractors.

SHE Coordinator to lead safety and environmental excellence on-site. Drive preventive culture, execute H&S actions, manage PRL campaigns, and ensure compliance with ISO 14001, 45001, and other relevant frameworks.

Trainee will support daily dealing operations activities, learn internal processes and systems, and participate in process improvement initiatives.

Freelance Cloud Data Migration Architect (GCP) needed for 3-month contract with potential extension. Requires extensive experience migrating to BigQuery, including Teradata, Oracle/Exadata, and Data Lake migrations. Expertise in Databricks, DataProc, data streaming, Java/Python, and SQL tuning is essential. Fluent English required, Italian preferred.

Consolidation Accountant needed for European entities. Prepare consolidated financial statements, ensure accuracy, and support statutory reporting. Strong IFRS/GAAP knowledge and Excel skills required.

Senior Ruby on Rails engineer to design, build, and scale backend systems for a live ad-serving platform. Responsibilities include ad delivery, targeting, attribution, reporting, and API development. Requires 5+ years of experience with Ruby on Rails, PostgreSQL, and background job processing. Strong understanding of system performance, uptime, and data correctness is essential.

Senior Data Analyst to design, develop, and optimize Power BI dashboards and reports. Requires 3+ years of experience in data analytics, strong Power BI, SQL, and Databricks skills, and experience working with large datasets.

Finance Controller will lead accounting, tax, and reporting activities for the Life Sciences & Health & Nutrition division. Responsibilities include managing a finance team, overseeing financial closings, ensuring compliance with GAAP, and collaborating with international stakeholders.

Medical Affairs Specialist to support clinical and scientific evidence generation for robotic surgery systems. Collaborate with clinical, regulatory, and R&D teams. Prepare documentation, conduct literature searches, and coordinate clinical investigations.

Experienced Business Development Manager needed to manage client relationships, convert leads, and drive business growth. Strong sales, communication, and relationship-building skills required. Fluent English essential.

McNeel Europe seeks a technical-commercial professional with Rhino expertise and experience in related fields (architecture, design, engineering, etc.). The role involves user support, client communication, and participation in commercial, educational, and community activities. Strong communication skills and fluency in English and Spanish are required.

Freelance Big Data Engineer needed for long-term project focused on developing and optimizing large-scale data processing solutions within AWS. Requires strong Python, PySpark, ETL, SQL, and AWS data services experience.

Full Stack Developer (React focus) for a leading streaming platform. Build and maintain the public-facing web using React, touch backend services (Node.js/TypeScript), and work with the AWS stack.

Leads the HR function for a Spanish industrial site, ensuring compliance with labor laws and collective bargaining agreements. Manages employee relations, advises management on labor law matters, and coordinates HR processes.

Clinical Operations Product Owner needed for AI Labs, the applied AI team within Insud Pharma. This role requires experience in clinical operations and a strong understanding of how GenAI and LLMs can improve clinical trial processes. The ideal candidate will bridge the gap between clinical operations and engineering, translating operational needs into technical requirements and ensuring successful tool adoption.

Recruitment Intern will manage the full recruitment cycle, from sourcing candidates to presenting them to clients. The role involves market research, relationship management, and integrating AI tools into the workflow. Must be a current student with a 6-month internship agreement and fluency in English plus one additional European language.

Project Delivery Practitioner to support large-scale, multi-site project execution. Track and manage project deliverables, identify and escalate risks, and support project planning and governance. Maintain project status reporting, ensure compliance with project management methodology, and support onboarding and coaching of project team members.