frontend developer English-speaking jobs in León

Senior Process Engineers will lead process design, optimization, and improvement initiatives for biomethane and biofertilizer plants. Responsibilities include process design documentation, control system development, and support for operations and procurement.

Experienced Scheduling Engineer / Manager needed to develop and maintain integrated master schedules for offshore wind farm projects. Responsibilities include building schedules in Primavera P6, defining WBS, performing critical path analysis, and monitoring project progress. Requires 5+ years of scheduling experience, advanced Primavera P6 expertise, and fluency in English.

Demandware OMS/OCI Developer will design, develop, and maintain Order Management and Order Center Integrations within the Salesforce Commerce Cloud ecosystem. They will implement order workflows, integrate external systems, and ensure seamless order lifecycle execution. Must have strong knowledge of API integrations, JavaScript-based controllers, pipelines, and SFRA-based storefront logic.

Graduate Sales Executive to drive new customer acquisition and engagement for Revolut Business in the German market. Responsibilities include lead sourcing, pipeline management, customer relationship building, and product expertise. Fluency in English and German required.

Junior Supply Planner needed for a 6-month contract. Responsibilities include end-to-end supply planning, purchase order management, inventory control, supplier relationship management, and collaboration with cross-functional teams. Requires a master's degree, 1+ year of planning experience, and fluency in English.

Support and grow a strategic partnership with Microsoft. Collaborate with internal teams and Microsoft stakeholders on pipeline growth, go-to-market initiatives, and partnership visibility.

Researcher to join the SUNTEC area focused on sustainable solar conversion technologies. Will develop smart glazing technologies, design control systems, and validate energy efficient glazing elements. Requires a Master's degree in a relevant field and experience in nanostructured materials and photo-electrochemical devices.

Security professional with SOC monitoring experience and German language skills needed for a 12-month freelance contract in Madrid. Responsibilities include monitoring security alerts, investigating incidents, and escalating threats.

Cloud Data Engineer with 5+ years of experience designing, developing, and deploying data pipelines on Google Cloud Platform. Expertise in BigQuery, SQL, data ingestion, data tokenization, and Airflow. Fluency in English and Spanish required.

Develops medical strategy and content for digital and print media. Analyzes clinical data, conducts literature searches, and performs competitive analyses. Guides the creation of promotional and KOL materials while ensuring effective use of clinical data.

Senior Electrical Engineer to plan and design water treatment solutions for Data Centre projects. Experience in industrial projects, especially Oil & Gas, energy, or water treatment required. Knowledge of international standards (IEC, UL, NFPA) and CAD tools (AutoCAD Electrical, EPLAN P8) essential. Minimum English B2 level required.

Drowsy seeks a Content & Social Director to build and lead a high-output content engine across Instagram, TikTok, and beyond. This role defines brand expression, develops content formats, and builds a team to produce high-quality content daily. The ideal candidate has experience growing social accounts, understands short-form video, and can balance brand-building with performance-driven content.

Lead the production cycle of complex multi-channel campaigns (Emailing & Landing Pages) at scale. Coordinate a multifunctional team to ensure deliveries meet strict SLAs, managing segmentations, lead workflows, and automations. Act as the primary point of contact for Regional PMMs, auditing production metrics and ensuring top-tier data quality.

We are seeking a Business Analyst to bridge the gap between business stakeholders and technical teams. The ideal candidate will have experience in gathering and refining requirements, API design, data model mapping, and system integration.

Ensures smooth delivery operations by managing contracts, coordinating resources, and ensuring customer satisfaction. Responsible for project delivery strategy, budget management, and risk mitigation. Requires 3-5 years of experience in international trade, project delivery, preferably in renewables or industrial engineering.

Experienced truck mechanic needed for maintenance, repair, and inspection of heavy vehicles in the Netherlands. Must have technical knowledge of engines, hydraulics, and electrical systems. Basic English skills required.

Provides instrument service and support to Werfen clients, including installation, maintenance, repair, and training. Manages workflow, client communication, and company reporting. Requires a bachelor's degree in a technical field and 2-5 years of experience in service or technical roles for life sciences or medical equipment. Fluent in English and Spanish.

Sephora Iberia seeks a Portuguese-speaking E-commerce Content Manager based in Madrid. The role involves managing and scheduling content for sephora.pt, executing campaigns, and collaborating with internal and external stakeholders. Experience with a large e-commerce CMS (e.g., Salesforce Commerce Cloud) is required.

Lead, coach, and develop a team of Inside Sales Agents to achieve and exceed sales targets. Monitor team performance, support lead conversion, and oversee outbound sales activities. Analyze sales data, identify improvement areas, and train new hires. Native-level Spanish and 3-5 years of sales experience with at least 1-2 years in a leadership role required.

Senior Data Scientist to develop scalable data models, build predictive models and dashboards, and automate data workflows. Requires experience with Python or Go, SQL, and ETL pipelines.