frontend developer English-speaking jobs in León

Junior Cybersecurity Engineer to perform vulnerability analysis and penetration testing on hardware and software products. Responsibilities include analyzing source code, using reverse engineering techniques, and conducting security evaluations in various frameworks. Must have a technical background, coding experience in Python/C/C++, and strong analytical and communication skills.

Leads engineering operations and maintenance across data center availability zones. Manages infrastructure build-out, project timelines, and vendor relationships. Oversees critical mechanical and electrical service availability. Develops and implements risk management strategies.

QC Analyst needed for weekend shifts at INSUD PHARMA's León site. Analyze API, intermediate, and final samples using techniques like GC, HPLC, TLC, and KF to ensure product quality. Complete analytical documentation and maintain chemical reagent stock. Minimum 3 years experience in analytical techniques and GMP/GLP regulations required.

Provide technical support via email, chat, and phone to OVHcloud customers on products such as domains, web hosting, and emails. Troubleshoot and resolve customer issues, ensuring customer satisfaction.

Provides high-quality service to internal and external clients, acting as the first point of contact for office and client matters. Coordinates daily office activities, ensuring smooth operations and compliance with company policies. Manages office supplies, travel arrangements, and service invoices.

The Technical Functional Analyst will translate business requirements into detailed functional specifications, user stories, and acceptance criteria. Responsibilities include drafting technical documentation, creating logic diagrams, and acting as a liaison between business stakeholders and the development team.

Experienced Clinical Research Associate (CRA) to support monitoring and site management activities across multiple studies. Responsibilities include on-site and remote monitoring, site start-up support, and ensuring compliance with study protocols and regulations.

Senior Competition Lawyer to support European operations across a range of competition law matters. 8+ PQE with strong academic credentials and robust competition law experience within a reputable in-house legal team. Expertise in abuse of dominance, horizontal and vertical agreements, M&A matters, and competition law compliance programs.

The Centro Nacional de Análisis Genómico (CNAG) seeks a Bioinformatic Post-doctoral fellow for the Biomedical Genomics Group. The successful candidate will have a PhD in bioinformatics or a related field and experience with NGS-data analysis, developing new methods, and working in a multidisciplinary environment.

OXON Epidemiology seeks a Clinical Project Manager in Spain for international observational and secondary data studies. Responsibilities include managing project teams, ensuring project completion on time and within budget, and serving as the primary client liaison. Requires a bachelor's degree in a health science or related field, fluency in English, 2-3 years of project management experience in a CRO or biopharmaceutical company, and knowledge of ICH, GPP, and GCP guidelines.

Experienced employment lawyer to lead a team of 8, providing strategic legal counsel and managing HR-related matters for a multinational technology company.

Lead Game Designer for Casino/Slot games. Ideate and develop game concepts, collaborate with designers, mathematicians, and engineers. 3+ years experience as a Slot Game Designer required.

Senior CPM Architect needed for multinational client's CCH Tagetik Centre of Excellence. Design, develop, and implement Tagetik solutions, including AiH, DTPs, ETL pipelines, and custom TQL scripts. Requires 5+ years' experience in Tagetik development (ideally with AiH) and expertise in SQL, data modeling, and integration.

Technical Lead will design, build, and evolve full-stack applications for AS1's digital platforms. Responsibilities include owning the technical architecture, integrating AI models and data pipelines, and collaborating with product and design teams. Requires experience in full stack development, system architecture, and AI solutions.

Tennium seeks a Communications Senior Associate to develop and execute communication strategies for tournaments and corporate projects. The role requires 5+ years of PR or communications experience, preferably in sports, tennis, or events. Excellent Spanish and English communication skills are essential.

Freelance Senior Clinical Research Associate (SCRA) needed for an ongoing respiratory virus study in Galicia, Spain. Requires 5 years of independent monitoring experience, fluency in Galician, and knowledge of early-phase clinical trials.

Develop and optimize the Salesforce Service Cloud platform. Translate business requirements into technical tasks and solutions. Ensure technical transparency by communicating design decisions to stakeholders.

Supervises casino gaming tables including Blackjack, Roulette, Poker, and Dice. Requires 3+ years dealer experience, strong math skills, and knowledge of gaming rules. Must supervise a team, handle disciplinary actions, and understand financial aspects of casino operations.

The Head of Physical Security IBIOL will define, implement, and oversee the global physical security strategy for NTT DATA in the region. This role will ensure the protection of people, assets, and facilities, physical business continuity, and regulatory compliance.

AI Principal Engineer will architect large-scale AI systems, define AI service integrations, and guide senior engineers on advanced AI and system design challenges. Requires deep experience designing distributed systems, API-based architectures, and AI technologies.