backend developer English-speaking jobs in León

Position: Scientific Labeler & LaTeX Specialist Job Type: Freelance, Fully Remote Job Summary: Thoth AI is seeking detail-driven, STEM-literate individuals to train vision-language models (VLMs) to understand and process complex scientific content.

This individual contributor role supports 3PL fulfillment centers, ensuring they meet performance standards. Responsibilities include training, troubleshooting, and fostering adoption of ShipBob's dashboard and services. The Operations Support Manager will build relationships with partners, address operational issues, and drive continuous improvement initiatives.

Lead Planner for a large-scale data center construction project in Zaragoza, Spain. Develop and maintain resource-loaded schedules using Primavera P6. Minimum 5 years' experience in planning large-scale construction projects required. Proficiency in Primavera P6, Earned Value Management, and Excel.

Account Executive to manage the full sales cycle for the US or UK market. Requires fluency in English (C2), 6-12 months of B2B/B2C sales experience (SaaS preferred), and strong negotiation and communication skills. Must be willing to work primarily late shift hours to align with US business hours. Previous experience with US markets and a Spanish language proficiency are a plus.

Join Amaris Consulting and contribute to large-scale digital projects with real impact on thousands of users. Be part of an international, agile environment and grow within a global organization that values expertise, innovation, and delivery excellence.

Senior Java Developer will design, build, and maintain software for a global credit card company. Responsibilities include ensuring software performance, participating in the Software Development Life Cycle, and collaborating with international teams. Requires strong Java skills, experience with APIs, AWS services, and Agile methodologies. Fluent English is required.

EPCM Project Engineer for logistics and industrial projects. Manages projects from feasibility to handover, including scope, budgets, procurement, and construction. Requires a Bachelor's or Master's degree in Civil or Industrial Engineering and 6-10 years of experience, with at least 4 years in logistics projects.

Service Engineer for Mobile Cranes provides on-site and remote technical support, performing commissioning, maintenance, and repair of crane equipment.

At Noray we are looking for an Executive & Commercial Coordinator will act as a key link between the CEO, internal production teams, and external customers and partners. This is a newly created role designed to strengthen the commercial and operational capacity of the company at a pivotal stage of growth.

Recruitment & HR Administration Specialist CACESA tech&logistics – Madrid, Community of Madrid, Spain (Hybrid) Location: Centro de Carga Aérea, Madrid (Hybrid: 2 days onsite / 3 days remote) ️ Start Date: Immediate Department: People & Culture Are you passionate about recruitment and looking to grow in an international environment?

DevOps Architect to design and evolve cloud and hybrid architectures. Define IaC strategies, establish DevSecOps standards, and select toolchains. Support teams with architectural guidance and ensure platform availability, performance, and observability.

Technical Sales Manager to support commercial activities by providing technical expertise in ingredient-based solutions. This role bridges technical and commercial teams, delivering tailored solutions to customers.

We are looking for passionate, curious and driven team players who are ready to ignite ideas, push boundaries and drive innovation. At Accenture you'll work on innovative projects and develop your career, collaborating with the best teams in the world.

Nazaríes intelligenia is a Spanish technology company focused on the development and support of software products used by organizations around the world. Our goal is to build reliable software solutions while acting as a long-term technological partner for our clients.

Business Development Manager to drive growth across Spain and Europe, focusing on OEMs, device manufacturers, and IoT solution providers. Manage the full sales cycle, build partnerships, and provide market intelligence. Requires +5 years of experience in IoT, telecom, or tech sales with fluency in English and Spanish.

Quality Manager to maintain and improve the Integrated Management System, ensuring compliance with ISO 9001, ISO 27001, and EN 9100 standards. Coordinate audits, manage non-conformities, and advise Engineering and Operations on quality and regulatory matters. Drive continuous improvement and enhance customer experience. Requires a degree in Aerospace or Industrial Engineering and 3+ years of experience in quality management within the aerospace or defense industry.

Senior .NET Developer to join an international team designing and building scalable software solutions. Requires Bachelor's degree in Computer Science, proven experience as a Senior .NET Developer, strong knowledge of .NET framework and C#, and experience with ASP.NET MVC, ASP.NET Core, HTML, CSS, JavaScript, relational databases, RESTful APIs, Git, and containerization technologies.

Mechanical Engineer will design, develop, and integrate mechanical and optomechanical components for advanced optical systems. Responsibilities include CAD design, prototyping, technical documentation, and collaboration with multidisciplinary teams.

Project Manager responsible for coordinating and executing projects, ensuring timely delivery, quality, and technical requirements. Leads cross-functional teams, collaborates with Customer Account Managers, and coordinates with R&D, Quality, and Production.

Leads the Business Intelligence function for HIP, analyzing portfolio performance and identifying trends, risks, and best practices. Translates findings into actionable insights for stakeholders. Manages data, conducts deep dive analyses, and supports project execution.