frontend developer English-speaking jobs in León

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.

Provides 1st and 2nd line eTrading support for Bonds, Inflation linked, and Swaps products. Resolves incidents, manages user requests, and collaborates with development and platform teams. Requires strong Fixed Income knowledge, experience with ION Marketview and TOMS, and capital markets support background.

SAP PP Specialist to support, enhance, and evolve SAP solutions for production planning and configurable products. Collaborate with business and IT stakeholders to ensure stable operations and continuous improvement.

Causality Research Scientist to develop and improve foundational methods in causal inference. Conduct data analysis on observational-longitudinal studies and collaborate with domain experts.

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.

RF/MW Solution Engineer needed to lead customer engagements, demonstrate Keysight products, and support sales. Requires a Bachelor's degree in Electronics Engineering, experience with RF/MW/mmW communications systems, and fluency in English and Spanish.

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.

Presales Engineer to plan and execute marketing plans, support sales and distributors with technical proposals and training, and collect market intelligence.

Academic Assistant needed for temporary contract at Les Roches Marbella. Support administrative and operational tasks in a dynamic international environment. Bachelor's degree required, native English speaker with advanced Spanish.

Support the Defense-AMP team in defining, piloting, and administering security solutions for CIB EMEA. Collaborate with the PSIRT to ensure alert relevance and drive remediation. Maintain malware protection tools, ensure 100% AV/EDR coverage, and automate tasks.

Lead the delivery of mobile applications for premium brands, combining iOS expertise with end-to-end ownership, team leadership, and technical execution. Define architecture, manage the mobile roadmap, and partner with cross-functional stakeholders.

Sales Representative / Business Developer responsible for developing new business and managing client accounts in Northern Spain and the Central region.

Customer Success Engineer will manage technical project delivery, provide technical enablement and coaching, and act as a trusted technical advisor to clients. Responsibilities include solution design, integrations, and managing technical escalations. Requires proven experience in client-facing SaaS roles, strong relationship building skills, and excellent communication in English and Italian.

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.

MEP Manager to oversee electrical & mechanical works on a large-scale Data Centre project in Madrid. Develop and maintain relationships with engineers, consultants, subcontractors, and suppliers. Lead, supervise, and develop MEP staff. Manage MEP procurement, budgets, quality, safety, engineering, coordination, scheduling, installation, commissioning, and close-out processes.

Treasury Analyst to support reporting, projects, and bank relationships. Requires 1-2 years of treasury experience, advanced Excel, and English fluency. Experience with TMS, Cash Pooling, and Business Central/Navision/OneStream is beneficial.

Accounts Receivable Intern will monitor accounts, investigate outstanding debts, contact clients, and process payments. Requires a finance background, English fluency, and knowledge of billing and collection techniques.

Process Engineer needed for a 6-month project in Bilbao, Spain. Must have experience in water treatment and wastewater treatment plant projects, including design, commissioning, and start-up. Requires a degree in Mechanical, Environmental, or Chemical Engineering and proficiency in Spanish and English.

The Chief Technology Officer (CTO) will lead the company's technology strategy and execution, ensuring alignment with business objectives. This role oversees engineering and development teams, manages technology infrastructure, and drives growth and innovation.

Information Security GRC Specialist to develop and track cybersecurity KPIs, implement processes (e.g., Vulnerability Management, Incident Management), and ensure timely remediation of security findings. Collaborate with European teams on application security and support documentation of governance processes and security policies.