Empleos de senior back-end javascript developer en Madrid

Location:Fully remote (European Union)Engagement:Contract, ongoing (initial term to end of September 2027)Start:ASAPAbout the roleOur client, a global industrial technology company, runs a B2B e-commerce platform and smart product catalogue built on Medusa, the open-source headless commerce engine. The backend is currently delivered by an external supplier,...

Rechat is building the next generation of enterprise real estate technology. Our platform helps real estate professionals streamline the entire buying and selling journey by unifying data, marketing, and transaction workflows into one powerful system. We’re a product-driven company with a modern stack, a strong engineering culture, and a mission to...

Location: Madrid, Spain (Remote - Must live in Spain) - 1 day per month Skills: Node.js, TDD, DDD & CI/CD Languages Required: Spanish (native/high level) & English (Professional) About the Role We’re looking for a Node.js Backend Engineer who thrives in collaborative environments and is passionate about building scalable, secure, and high-quality...

A global leader in FinTech is building a brand-new Engineering team and is looking for experienced Senior Software Engineers (Backend) to join them. They’re hiring across all levels, including Senior Engineers, Staff Engineers, Principal Engineers, even Team Leads. This is an opportunity to work on deeply technical, innovative solutions as part of a...

Back End Developer / Integration EngineerCountry: SpainIT STARTS HERESantander ( www.Santander.Com ) is evolving from a global, high-impact brand into a technology-driven organization, and our people are at the heart of this journey. Together, we are driving a customer-centric transformation that values bold thinking, innovation, and the courage to challenge...

DescriptionAbout XeXe is a cross-border payments platform. We help SMEs and consumers in the US, UK, Canada, Australia, and New Zealand collect, convert, hold, and send money across markets. Each year, over 300 million people use Xe for currency information and over 350,000 use us to send money overseas.Today, we're rebuilding the platform layer behind...

Senior back-end engineer to design, build, and maintain cross-border payment platform services, mentor junior engineers, and lead technical direction using modern stacks and AI coding tools.

Ubicación: Madrid – Teletrabajo¿Interesado en saber más sobre este trabajo? Desplácese hacia abajo y descubra qué habilidades, experiencia y cualificaciones académicas se necesitan.Experiencia: +5 añosTipo de contrato: Indefinido -Horario flexible y teletrabajo adaptable al proyecto.-25 días laborables de vacaciones, con días extra por...

Qaracter es una firma de consultoría internacional que ofrece servicios de asesoramiento en los ámbitos de negocio, finanzas, riesgos, tecnología y operaciones. Combinamos un profundo conocimiento sectorial con una ejecución práctica para brindar soluciones de alto impacto adaptadas a las necesidades de nuestros clientes. Tenemos oficinas en España,...

Krell Consulting & Training, S.L. busca un desarrollador frontend con experiencia en Cells para incorporarse a un proyecto estratégico en el sector bancario en Madrid.Se prevé una duración de varios años y la presencialidad es de tres días a la semana. Ofrecemos contrato indefinido y salario bruto anual de 29-31k dentro de un entorno de desarrollo...

Principal Consultant | Open-Source, Embedded, CPU/GPU + Semiconductor Technologies Back End Developer (Python)***This is initially a Fixed Term Contract until the end of June 2026 - potential for extension/made permanent***We are working with a company that focuses on accelerating AI adoption, data literacy, and engineering capabilities through a combination...

Develop and maintain backend services and cloud-based solutions for EOX and Helix platforms, enabling secure, scalable, and high-performing digital products Design and implement secure databases, data models, and communication interfaces Develop and support cloud applications and services using Microsoft Azure technologies Build and maintain...

Develop and maintain back-end payment systems using PHP, DDD, and Event Sourcing. Integrate payment methods, ensuring scalability, and collaborate with product teams.

JOIN KLEO AND BUILD THE FINANCING INFRASTRUCTURE FOR EUROPE'S COMPANIES¿Tiene las habilidades necesarias para este puesto? Lea todos los detalles a continuación y presente su candidatura hoy mismo.Kleo ( is an AI-native platform that helps compaies find, match, manage, and monitor their entire financing stack: public grants, bank lending and private...

Back End Developer / Integration EngineerCountry: SpainIT STARTS HERE Santander (www.santander.com) is evolving froma global, high-impact brandinto atechnology-driven organization, and our people are at the heart of this journey.Together, we are driving acustomer-centric transformationthat values boldthinking, innovation, and thecourage to challengewhat’s...

Senior Backend Developer - Node.Js Remote | Europe A fast-growing global consumer technology company is looking for a Senior Node.Js Backend Developer to join its international engineering team. The organisation builds innovative real-time digital products used daily by millions of users worldwide. Their platform focuses on creativity, self-expression, and...

Seeking a Senior Backend Engineer with Java/Kotlin experience to design and build high-traffic systems for a global travel tech client. This hybrid role in Madrid offers full ownership of core backend services.

Momentum Reim busca un Desarrollador Back End en Cataluña, España, para unirse a su equipo en Sesame HR. El candidato ideal tiene al menos 3 años de experiencia y un sólido conocimiento en PHP, Symfony y Docker. Ofrecemos un entorno de trabajo ágil y colaborativo, con formación continua y la oportunidad de aportar ideas en un equipo proactivo. El rango...

A multinational technology firm based in Barcelona is seeking a Senior Back-End Developer to design and build robust backend systems. You will utilize Node.js and TypeScript while integrating AI-driven solutions in production environments. The ideal candidate has 5–7 years of experience, excellent communication and teamwork abilities, and must be fluent in...

Adwake is a tech-enabled services company powered by Entravision. We are a dynamic technology company building a high-availability offerwall platform that connects users with engaging opportunities. Our mission is to deliver seamless, high-quality experiences across web and mobile devices, and we’re looking for a Senior Frontend Developer to join our...