frontend developer English-speaking jobs in León

Drive commercial expansion for a biotech company developing a liquid biopsy platform. Identify and develop relationships with pharma, biotech, and CRO partners globally. Position the platform as a solution for MRD and ctDNA detection, treatment response monitoring, and companion diagnostics.

The Biorepository Technician will maintain, develop, and implement protocols within the Biorepository team. Responsibilities include sample reception, quality control, aliquot preparation, data management, and documentation. Requires at least 3 years of experience in molecular biology laboratory techniques, including DNA/RNA extraction, quality control, and quantification. Experience with LIMS databases and liquid handling robots is preferred.

Drive the B2C performance of S-Vibe, Bioxy's wellness brand. Manage the online store, lead growth initiatives across paid, CRM, and retention channels, and ensure a positive customer experience.

Plant General Manager will lead multiple manufacturing sites in the Vigo region, ensuring safety, quality, delivery, costs, and productivity. The role requires 10 years of experience in plant or industrial management, a proven track record in managing complex operations, and strong leadership skills.

Solution Specialist will work with small and medium-sized companies, maximizing up-sell and cross-sell opportunities. Responsibilities include presenting cloud solutions, providing technical product overviews, and conducting trainings. Requires proficiency in Danish and English, 3-6+ years of technology sales or business development experience, and a minimum Fundamentals certification.

Cloud Solution Architect needed to design and deliver end-to-end cloud architectures using Microsoft Fabric and Azure services. Experience with Azure SQL, SQL Server, PostgreSQL, and MySQL required.

The HR Cybersecurity Compliance Analyst will support Cyber Security and Privacy compliance for HR processes and supporting applications. Responsibilities include ensuring HR systems comply with data protection regulations, conducting risk assessments, and collaborating with HR and IT teams to implement secure configurations and access controls. The ideal candidate will have a Bachelor's degree in Cybersecurity, Information Technology, Computer Science, or a related field and 3-5 years of experience in cybersecurity, IT audit, or compliance roles.

Senior Accountant needed for the Finance department in Barcelona. Responsibilities include statutory and tax accounting, journal entries, reconciliations, reporting, and liaising with business partners. Requires 6+ years of experience, a bachelor's degree in accounting, and proficiency in Excel. Spanish-GAAP experience is valued.

The Laboratory Lead manages a veterinary diagnostic reference laboratory, overseeing team management, technical support, quality control, and budget. Responsibilities include meeting operational key performance indicators, ensuring associate training and development, and leading laboratory work activities.

Customer Success Manager will own and grow a portfolio of enterprise accounts across Europe, ensuring customer value and expansion. Responsibilities include onboarding, adoption, retention, and acting as a customer advocate. Requires 4+ years of B2B SaaS Customer Success experience, strong communication skills in English and Spanish, and a proven track record of revenue growth.

Security & Governance Lead will shape Alinia AI's security, governance, and compliance practices. Responsibilities include managing security and compliance programs, certifications, and customer procurement processes. Requires 6+ years of experience in security, governance, risk, or compliance roles, ideally in a SaaS or cloud-native environment. Must be fluent in Spanish and English.

Project Documentation Intern to support the Greenfield & Operation Department. Assist with organizing, classifying, and archiving project documentation. Maintain document registers and filing systems. Coordinate with project engineers and team members. Support documentation packages for audits and reviews. Bachelor's degree in Engineering, Business Administration, or equivalent experience required. Chinese mother-tongue, business fluency in English, and fluency in Spanish preferred.

Full Stack Engineer needed to build and maintain scalable web applications using Python and TypeScript. Experience with Web Components, Strapi, Docker, and CI/CD pipelines required.

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.

Leads commercial efforts to expand renewable energy product sales in Spain and Iberia. Develops sales strategies, builds partnerships, and manages a sales team.

Assist Test Engineer with software, device, or prototype testing. Perform hands-on assembly and disassembly of testing equipment. Execute testing based on test cases and perform exploratory testing. Troubleshoot issues, identify root causes, and report defects.

This is a fixed-term contract until July 2026 for a Machine Learning Platform Engineer to design, deploy, and operate production-grade machine learning and AI systems. Responsibilities include deploying models, building automated pipelines, and improving reliability and performance of ML services. Strong Python engineering background and experience running production services on cloud platforms are required.

Manage purchase orders for A materials and high-value B materials. Responsible for budgetary management, procurement strategies, and project milestone management. Requires a technical degree, experience in supply/process management, and fluency in English and Spanish.

Design and develop robust APIs and backend services for a tech-driven textile recycling company. Manage and optimize relational databases and collaborate on architectural design. Requires 4+ years of experience as a Backend Engineer with Node.js and TypeScript.

Supports product onboarding, maintains product listings, and monitors e-commerce operational metrics. Analyzes financial data, manages reports, and assists with billing tasks.