frontend developer English-speaking jobs in León

This Business Analyst role focuses on data mapping, UAT, and defect resolution for new country and compliance requirements. You will ensure smooth system integration and releases. Experience with data mapping, UAT, defect tracking, and working across business, IT, and vendor teams is essential.

Provides legal advice to business units on M&A, corporate, commercial, and civil matters. Advises on the legal implications of company strategy and initiatives. Supports M&A transactions, including drafting and negotiating transaction documentation.

The Customer Administration Specialist (Billing) will review billing volumes, analyze and manage billing rules, and interact with other departments to resolve incidents and modify contract conditions. The role requires proficiency in English, strong analytical skills, and experience with administrative tasks.

Regulatory Affairs Specialist supporting product registrations and market access for women's health food supplements in EU and ROW markets. Experience with EU food supplements and understanding of international regulatory requirements are required.

Human Resources Intern to support HR operations, including recruitment, onboarding, administration, and employee engagement. Provides operational and administrative support across the employee lifecycle.

Nuclio Talent seeks a Partner Business Developer to generate and scale partner-sourced pipeline in the Italian market. Responsibilities include designing partner programs, conducting outreach, managing relationships, and qualifying leads. Native Italian speaker with sales experience and strong communication skills required.

Lead, manage, and execute Lean projects across the organization. Coordinate and implement process standardization strategy. Build and maintain a process management structure.

FLUZO seeks a Sales Representative to develop and execute sales strategies for the UK market. The ideal candidate will have at least two years of B2B sales experience, preferably in advertising, and a network of UK advertisers and media agencies. Fluency in English and Spanish is required.

Assembly Technician needed for a leading space engineering and telecommunications company. Responsibilities include operating technical equipment, performing maintenance, fault finding, soldering, and assembling mechanical structures. Requires vocational training in electronics, experience in manufacturing and testing, and strong communication skills.

Senior Optimization Engineer needed to architect and deploy advanced nonlinear optimization engines. Responsibilities include designing custom algorithms, translating multi-physics phenomena into optimization problems, and customizing solver behaviors. Requires a PhD in a relevant field and deep knowledge of nonlinear optimization theory, programming languages (Julia, C++, Python), and large-scale solvers.

Leads strategic planning and optimization initiatives across multiple Business Units, driving efficiency and supporting digital transformation. Manages the S·TACT process, develops the Fully Automated Supply Chain, and coordinates cross-border supply interactions. Analyzes data, identifies improvement actions, and prepares technical documentation.

This entry-level position supports global research initiatives by gathering and organizing market and client intelligence. The role involves data collection, entry, and basic visualization to ensure accurate business insights.

QA Operations Technician will review product specifications, investigate deviations, and manage complaints. Experience in GMP and proficiency in English and Spanish are required.

Regulatory Operations Specialist to support Regulatory Affairs by analyzing and reporting regulatory data. Will contribute to the transition to a unified platform, ensuring consistent data recording and reporting. Requires a Bachelor's degree in a scientific field, 5+ years of Regulatory Affairs experience, and proficiency in electronic document management systems.

Technical Support Engineer needed for growing EV charging operations in Europe. Provides pre-sales and after-sales technical support, resolves customer issues, gathers feedback for product improvement, and creates technical documentation. Requires fluency in Spanish, 3+ years of EV industry experience, and a bachelor's degree in a relevant STEM field.

Data Scientist needed to analyze large datasets, develop machine learning models for ad targeting and campaign performance, and collaborate with teams to improve advertising impact. Requires 5+ years of data science experience, 3+ years in AdTech, and proficiency in Python, SQL, and ML frameworks.

After-Sales Service Technician needed to provide technical support to German-speaking dealers, customers, and sales representatives. Manage warranty cases, technical incidents, and spare parts requests. Must have proven experience in the cycling industry and strong technical bike knowledge. Native German required.

The Engineering Manager leads and develops a team of 20 engineers, ensuring the execution of multiple concurrent R&D projects. Responsibilities include project planning, resource allocation, team management, and communication with customers and stakeholders.

Junior Administrative Assistant to support accounting, marketing, and stock operations. Responsibilities include invoice processing, stock reporting, shipment tracking, and marketing support tasks. Requires vocational training in a related field, conversational English, and proficiency in Excel.

Provides operational and technical support in the laboratory, performing chemical tests and contributing to project development. Prepares laboratory equipment and documentation, and supports the efficient operation of the laboratory.