frontend developer English-speaking jobs in León

Are you looking for a new challenge abroad? At Hays, we're partnering with a leading company in the consumer goods sector to recruit a Maintenance Engineer for one of its production plants located in Northern Europe. If you have experience in industrial maintenance and want to lead and optimize operations in a multinational environment — this is your chance!

Group-IB: Founded in 2003 and headquartered in Singapore, Group-IB is a leading creator of cybersecuritytechnologies to investigate, prevent, and fight digital crime. Combating cybercrime is in the company’s DNA, shaping its technological capabilities to defend businesses, citizens, and support law enforcement operations.

Senior Optimization Scientist We are seeking an experienced Senior Optimization Scientist to design advanced optimization models and algorithms that solve complex engineering and operational challenges.

About Us: INFINNI is building the infrastructure that powers the creator economy. We’re a technology company reimagining how creators work by designing powerful, modern tools that make it simple to manage, distribute, and scale their work. The creator economy is on track to exceed $480B by 2027, yet the software powering it is fragmented and outdated. We’re here to change that.

Role: Legal Counsel Location: Madrid, Spain (Hybrid) A leading player in the renewable energy sector, this company specializes in the development, construction, and operation of clean energy infrastructure across Europe. With a focus on utility-scale solar PV, wind, and energy storage projects, it manages a diversified portfolio spanning multiple countries.

For our partner, the newest MedTech Start-up out there, we are looking for an English-speaking Backend Developer (m/f/d) 100% remote. roclub is a fast-scaling MedTech start-up that builds the technological backbone for the future of remote medical device operations. The company's mission is to revolutionize how medical equipment is managed and supported worldwide.

About usFor more than 20 years, our global network of passionate technologists and pioneering craftspeople has delivered cutting-edge technology and game-changing consulting to companies on the brink of AI driven digital transformation. Since 2001, we have grown into a full service digital consulting company with 5500+ professionals working on a worldwide ambition.

RevOps Manager (Medior) — Continental EuropeMadrid (Hybrid)Location: Madrid, Spain (minimum 3 days per week in the office)Scope: Spain, Portugal, Austria, Switzerland, and other Continental European marketsFunction: Revenue / Go-to-MarketReporting to: Commercial PresidentContract: Full-time, permanentAbout HubexoHubexo provides data, insights, and software that help the construction market make

Facilities Services Assistant Madrid | Fully on-site | Monday to Friday, 9:00–18:00 Start date: January / February Are you someone with experience in office, facilities, or workplace support and is now looking for a role where you can be more involved, gain visibility, and build on what you've learned so far?

About Us Quantum One is a leading AI solutions provider in UAE. We build AI-powered products for real-world operations in energy, logistics, manufacturing, and other complex industries. Our Industrial AI platform enables data-driven decisions and autonomous workflows — integrated directly into mission-critical environments.

This is a great opportunity to join our service operations team and support both employees and clients at the BAA Training office in Barcelona. BAA Training operates internationally, with offices in Vilnius (Lithuania), Barcelona and Lleida (Spain), Paris (France), Ho Chi Minh City (Vietnam) and Delhi and Bangalore (India). Aviation is a fast-paced and truly multicultural environment.

A forward thinking Swiss tech company are seeking to bolster their team with an experienced Senior Backend Engineer. Please note this is a fully remote opportunity based from Spain with occasional travel. Full rights to work must already be in place before applying.

Therapy Development Manager/Regional Sales ManagerLocation: Spain & Portugal (Iberia – National remit)We are seeking a highly driven and entrepreneurial Therapy Development Manager to lead the launch, development, and scaling of an innovative Class III implantable therapy across Spain and Portugal.

Job Summary The Sales Applications Specialist will be responsible for sales, promotion and technical support to the customers in order to guarantee the right performance of both reagents and instruments, providing our customers with solutions that adapt to their changing needs, creating a relationship of trust that will bring value to the Company in the medium and long term.

About CytovationCytovation is redefining cancer immunotherapy from the inside out. Our lead asset, CY-101, is a first-in-class bifunctional peptide designed to address immune exclusion in liver metastases and other immune-suppressed tumor environments.

Would you like to be part of our team? You will encounter challenging projects, work alongside outstanding professionals, and have opportunities for professional growth and international experience. Aernnova strengthening its team of Production!

Reference: VB7153 Salary: €50,000 - €60,000 + benefits Location: Barcelona This role exists to ensure the personal, household, and family domain of the CEO operates seamlessly, with a level of discretion, reliability, and anticipation that supports the CEO’s overall effectiveness.

A leading tech company in the e-commerce space is looking for a Software Engineer to work on the deepest part of the products in an autonomous and multidisciplinary product team to provide solutions according to the business needs. Key responsibilities:You will work in a Python-based ecosystem, ideally using hexagonal architecture.

Location: Madrid Spain Experience: 15 - 18 years We are seeking an experienced Presales and Solution Architect to join our team in Tata Communication Transformation Services. The successful candidate will be responsible for designing and proposing solutions for Transport and IP MPLS technology.

Join Us as an AWS Cloud Engineer About the Role: We are seeking some certified AWS cloud engineers with proven experience in the migration of applications and databases from on-premise to AWS cloud.