Empleos de ruby on rails backend developer en madrid

UST is seeking a Backend Developer Analyst to join the SIMA Squad, focusing on Apache Spark and Scala development for data processing solutions. The role emphasizes collaboration with business and tech teams to deliver scalable, robust backend systems in an Agile environment.Location: 100% remote for candidates based in Spain. You will work across analysis,...

Innovative solutions on the pulse of time, a dynamic and progressive working environment, versatile opportunities - this is the world of SKIDATA. Become part of our strong, international team now and shape the future of modern access systems with your ideas and know-how.Desplácese hacia abajo para ver todos los requisitos del puesto y las responsabilidades...

Accenture seeks an experienced Java Developer in Madrid to join technology teams working on large-scale enterprise solutions in international environments. The role requires strong backend skills with Java, Spring, and REST APIs, plus experience with relational databases and English B2. We offer a permanent contract with competitive salary, health and life...

Deutsche Telekom AG in Spain seeks a Java Backend Developer to join TAO department, contributing to critical public administration applications. You will work in an environment emphasizing code quality, architecture, and agile practices, with exposure to AI-assisted development and cross-disciplinary collaboration. The role offers hybrid work options across...

About the companyBiorce is a pioneering Healthtech company dedicated to revolutionizing drug development through the power of AI. We are passionate about accelerating medical advancements and improving patient outcomes. Our team comprises seasoned clinical research professionals, data scientists, and AI experts, working collaboratively to bridge the gap...

Talan Group is seeking an experienced Java Developer (Big Data) to join a senior technical team focused on backend development in a regulated financial environment. The role involves working with large data-intensive platforms, contributing to microservices architectures, and collaborating in CI/CD pipelines. Ideal candidates will have a strong background in...

Backend Developer (C# / .NET & Integrations) – Global Customized Solutions Build the integrations that make complex access solutions work. What happens when a customer needs SKIDATA products to work with a system they already rely on? That’s where you come in. As a Backend Developer, you'll primarily work with C# / .NET, designing and building software...

We are working with a leading French health-tech group, one of the major players in information systems for the Healthcare sector, with close to 6,000 employees across more than 10 countries. This position is part of a small, highly operational team working on a product that connects patients, insurance companies and doctors, particularly specialists.The...

Netenders, based in Barcelona, seeks a Senior Full Stack Developer (Freelance) to collaborate with the in-house team on long-term e-commerce CMS projects. You will architect scalable Rails backends and React frontends, focusing on supplier integrations and high-volume data flows. You will work autonomously in a freelance capacity, with flexible remote...

AssociateIT, Telecom & InternetTravel Required: 0%-10%30-Nov-2026Backend Developer – Global Customized SolutionsBuild the integrations that make complex access solutions work.What happens when a customer needs SKIDATA products to work with a system they already rely on? That’s where you come in.As a Backend Developer, you’ll design and build tailored...

Talan Group in Spain is seeking an experienced Backend Java/Spring Boot Developer with Camunda 8 to join our growing engineering team. You will design, develop, and maintain scalable backend solutions, implementing Camunda BPMN processes and integrating with microservices. The role requires 3+ years experience, English at C1, and hands-on work with Java 11+,...

Netenders is an international e-commerce group based in Barcelona, operating several leading online stores in Europe and North America. As we continue to grow and innovate, we are developing our own cutting-edge e-commerce Content Management System (CMS) to revolutionize the online shopping experience across our brands. We are looking for a Senior Full Stack...

Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultantsin 21 countriesand a turnover of €850M, we are committed to delivering impactful, future-ready solutions.Talan at a GlanceHeadquartered in Paris and operating globally, Talan combines technology, innovation, and...

Job DescriptionWe're looking for aCraftTechnology & DevelopmentJob DescriptionWe're looking for a Java backend developer to join our Catalog Games team and help build and improve the technology behind our games.You'll develop game features, services, tools, and systems while collaborating with people across different disciplines. You'll contribute throughout...

Semrush is a brand visibility platform, empowering marketers to command their online presence and create measurable impact. We unify SEO authority and AI visibility, so brands are found, cited, and chosen everywhere search happens. That’s how Semrush gained the trust of over 28 million users—from scaling startups to Fortune 500 companies. Here, you own...

Team Lead Backend Developer (Node.Js)(Relocation to Spain)Join the Team Lead Backend Developer (Node.Js)(Relocation to Spain) role at BrainRocket.BrainRocket is a global company creating end-to-end tech products for clients across Fintech, iGaming, and Marketing. Young, ambitious, and unstoppable, we've already taken Cyprus, Malta, Portugal, Poland, and...

Nueva oportunidad | FULL STACK DEVELOPER | Modelo híbrido En Claire Joster acompañamos a las organizaciones en la identificación y selección de talento cualificado para posiciones de Mando Intermedio y Management en el ámbito tecnológico. Trabajamos siempre poniendo en el centro a las personas, entendiendo tanto la cultura como los valores de cada...

Siemens Mobility in Valencia, Spain, is seeking a Backend Developer (m/f/d) for a DevOps team focused on Java microservices within the S3 Passenger suite. The role emphasizes performance, security, and scalable architectures in a hybrid remote/on-site setup.You will work with Java, Kotlin, Go, and infrastructure tools like Terraform and Kubernetes,...

Founding engineer role shaping a new Factorial spinoff focused on making AI central to workflow management. You’ll own big initiatives, define quarterly roadmaps, and work closely with cross-functional teams to ship usable AI features. The role blends fast execution with thoughtful, reliable design in a cloud-native stack. You’ll join a scrappy, highly...

Overview Senior Backend Java Developer (Microservices / AWS) (2) — Spain | Hybrid in Madrid, Barcelona, Málaga or Logroño | Remote in the rest of the countryFull-timeWe are looking forSenior Backend Java Developersto join an international digital banking project focused on building scalable, cloud-native backend solutions.You will work on the development...