frontend developer English-speaking jobs in León

Functional Consultant (M/F) to join a growing team in Madrid. Work on PLM projects in the aerospace industry, converting customer needs into functional specifications. Requires security clearance and client site presence.

Customer Experience Specialist will lead follow-up and support calls with prospective customers, representing a premium automotive brand. Responsibilities include reinforcing brand value, identifying customer concerns, and collecting insights to support sales teams. Must be bilingual in Flemish and English with experience in customer service or sales, ideally within the automotive or luxury sectors.

Lead the design and governance of scalable, secure, API-first and event-driven architectures. Architect microservices-based and event-driven systems, integrating cloud, legacy, and third-party platforms. Provide technical leadership and mentorship to development teams.

Regional Quality Manager for Europe will develop, establish, and maintain Potters' Quality Plan, including programs, policies, procedures, and controls. The role harmonizes quality control across 9 European production plants, optimizes processes, and ensures adherence to ISO standards. Requires a university degree in a scientific field, 5+ years of quality management experience in the glass industry, and proficiency in Spanish and English.

Provides end-to-end technical support for desktop and laptop systems, including troubleshooting, IMAC activities, and software management. Administers approved software installations, updates, and security patching. Offers remote and deskside support for various applications and devices. Ensures compliance with security protocols and IT policies. Documents incident resolution and maintains technical guides.

Quality Control Scientist needed for drug substance and drug product control, stability studies, and quality control testing. Requires expertise in analytical techniques (HPLC, GC, etc.), project leadership, and GMP compliance. Must have a Bachelor's degree in Chemical Sciences and experience in a pharmaceutical environment.

Account Executive to join a hybrid team in Madrid, Spain. Drive the full sales cycle, from prospecting to closing. Develop sales strategies, prepare proposals, and negotiate contracts. Proven sales experience (at least 6 months) and fluency in Polish (C2) and English (B2) required.

International Marketing Product Manager will develop and execute marketing plans, analyze market data, and manage product lifecycles for global launches.

Recruitment Consultant to identify and recruit mid-level and senior professionals for Italian companies in the renewable energy sector. Manage full-cycle recruitment processes and collaborate on market mapping. Fluent in English, Spanish, and Italian required.

Heisterkamp Trailer Rental seeks a Business Development Manager to accelerate commercial growth and expand the customer portfolio in Spain. The role involves developing and executing a market growth strategy, identifying business opportunities, and managing the full sales cycle.

Lead and manage daily Beach operations at a 5* lifestyle hotel, ensuring luxury, safety, and aesthetic standards. Drive departmental results, including KPIs, revenue, and guest satisfaction. Develop revenue strategies and optimize resources. Manage budgets, inventories, and team development. Coordinate with other departments and ensure regulatory compliance.

Analyzes solar farm performance, identifies issues, and reports findings to ensure optimal operation. Collaborates with teams to onboard new sites, monitor performance, and improve processes. Requires data analysis, technical knowledge, and communication skills.

Java Tech Lead with 5+ years of experience and AWS knowledge sought for a banking client project. Responsibilities include designing, building, and maintaining software, ensuring performance and quality, and participating in the full software development lifecycle. Must have strong Java skills, API knowledge, and experience with testing types, design patterns, and Agile methodologies. High English proficiency and availability for 3 days/week at client offices in Madrid are required.

Software Engineer to build LLM-based workflows and agentic features for industrial factories. Develop Python/C# services, design LLM pipelines, and ensure quality through testing and monitoring. Collaborate with domain experts to iterate on prototypes and productionize solutions. Requires 3-5 years of software engineering experience, proven hands-on experience with Claude Code, and strong Python and C#/.NET skills.

Rezefy seeks a Content Creator to be the primary face of the brand across TikTok, Reels, and Shorts. You will create story-driven videos, research trends, and film on-ground content. Collaborate with another Content Creator to plan, film, and iterate on content daily. Must be confident on-camera, understand social media trends, and thrive in a fast-paced environment.

The Showroom Specialist assists with daily operations in the Cosentino City showroom, providing customer service, coordinating events, and visiting customer accounts. Responsibilities include generating sales leads, developing relationships with design firms, and supporting the sales team. The role requires 2+ years of sales experience and 1+ year in a retail showroom environment.

This EHS Specialist role supports production teams, offices, laboratories, and customer service technicians in Barcelona and across Spain. Responsibilities include implementing EHS standards, conducting audits, providing training, and managing risk control in chemical handling environments. The role requires strong knowledge of industrial and EHS legislation, hazardous materials management, and risk control.

Sales Development Representative to drive revenue growth and market expansion in the FinOps space. Develop outbound prospecting strategies, identify high-value accounts, and book meetings for Account Executives. Prior SDR experience and knowledge of cloud computing are required.

Global Clinical Contract Specialist manages negotiation of Clinical Trial Agreements, Confidentiality Agreements, and budgets for phases I-IV clinical trials in the EMA region. Ensures contractual compliance with EMA regulations, GDPR, and internal standards. Coordinates with global and local teams to align contractual terms. Requires a university degree and 5+ years of experience negotiating clinical trial contracts in the EMA region.

Manages institutional-grade execution of crypto transactions, including spot and derivatives, with a focus on cost control and slippage benchmarks.