Empleos de full stack software engineer en madrid

Kleinanzeigen is Germany's leading online classifieds platform with 36M+ monthly users. You will bridge a high-traffic backend with polished user experiences, owning the full lifecycle from design to deployment. Join the Edge team to work on scalable services in a hybrid work environment, collaborating across backend, frontend, and platform infrastructure....

AD4 Octógono busca un Desarrollador/a Fullstack Senior (MERN) para diseñar y construir soluciones web completas, robustas y escalables, tanto en frontend como en backend, con impacto directo en producto y negocio.Formará parte de un equipo técnico internacional, participando en diseño, desarrollo y evolución de aplicaciones modernas, con APIs REST,...

remoteo busca profesionales con experiencia en desarrollo web full stack usando React y .NET, capaces de migrar aplicaciones WinForms a una arquitectura web moderna. Se valoran APIs REST y SQL Server, Git y CI/CD en entornos ágiles.La empresa ofrece plan de carrera, formación continua, proyectos nacionales e internacionales con movilidad, tarjeta...

Senior Full Stack Engineer | B2B Contract | Fully Remote | €600/day We’re looking for a Senior Full Stack Engineer to join an exciting e-commerce company on a 6-month B2B contract, with a strong possibility of extension. This is a hands-on engineering role for someone who enjoys building scalable products, working across the stack, and making the most of...

About ABCDxABCDx is a Swiss-Spanish MedTech company developing innovative blood-based point-of-care diagnostic solutions combining biomarkers, lateral-flow technologies, smartphone image analysis and clinical algorithms. Our focus is on acute neurological and cardiovascular conditions, with clinical development activities across Europe.About ABCDxABCDx is...

We are MSQ DX – the world's first digital impact company. ¿Quiere presentar una candidatura? Asegúrese de que su CV está actualizado y luego lea atentamente las siguientes especificaciones del puesto antes de solicitar. We believe that brands grow or fail based on their digital experience.With over 500 experts worldwide, we help brands create...

Owen Thomas | B CorpTM is seeking a Senior Staff Full stack Engineer on a 12?month contract.This fully remote EU?based role centers on Rust and Java for backend, with React and Python as secondary stack.The contract is Outside IR35 and pays £******* per day.You will help shape backend services, contribute to architectural decisions, and collaborate with...

Affinist is a remote-first company hiring a Senior Full-Stack Software Engineer for the Repayments UX.The role is based in Spain and visa sponsorship is possible, with the team located across Europe in the same time zone.You will own quarterly goals, collaborate across product, design, and analytics, and help ensure reliability and growth at scale.Base pay...

Corporate Sales Engineer - German (Remote) Spain - Barcelona Germany - Remote Full time As a global leader in cybersecurity, CrowdStrike protects the people, processes and technologies that drive modern organizations. Since 2011, our mission hasn't changed - we're here to stop breaches, and we've redefined modern security with the world's most advanced...

* We’re launching a new team dedicated to modernizing and expanding one of our customer-facing tools — and we’re looking for a Senior Full Stack Engineer to help build it from the ground up * This isn’t a legacy product handoff: you’ll be joining at the very start, shaping both the technical direction and the team culture from day one * The current...

About the Role Working with a Series B Tech startup within energy industry. We are looking for a Staff Full Stack Engineer to lead technical vision, architectural design, and execution across systems driving their expansion. You will build high-impact backend infrastructure, automate tendering workflows, design deal-gating risk tooling, and deploy agentic...

Albertine is seeking a seasoned full stack engineer to ship features across our TypeScript platform. You’ll shape API contracts, implement service and data work, and build the React UI members and agents actually use. Both halves must be solid in data choices and UX that feels finished. You’ll work across memberships, bookings, and billing with a focus...

Kapa.ai is seeking a software engineer to work across the stack, helping answer thousands of developer questions daily. You will scale the RAG engine, build features in the analytics platform, and maintain client integrations using React and Python. The role requires a CS/ML background with 3+ years of experience in backend and frontend work, and an interest...

Jobgether, based in Spain, is seeking a Senior+ Full-Stack Engineer to build a developer infrastructure platform enabling AI applications to connect with external APIs. You will own features from design to deployment across backend, APIs, runtime, and frontend, while collaborating with customers in a remote-first startup. Role emphasizes autonomy,...

Affirm, Inc. is hiring a Software Engineer II, Fullstack (Repayment UX) to join our remote-first team based in Spain. You will help design and ship backend systems and web apps using React or Vue, with optional React Native experience.The role supports a European-wide time zone and requires on-call rotation. The Repayment UX team works across product,...

Brayton Global is seeking a Senior Full-stack Engineer to develop and maintain enterprise apps, modernise legacy systems, and integrate AI tools into development workflows.Responsibilities include designing full-stack solutions, leveraging AI assistants, and ensuring secure, scalable deployments across MCP-enabled platforms. Strong knowledge of Java/Spring...

Zartis is seeking a Full Stack Engineer with a strong backend focus to join our distributed team. You will design and implement production-grade services in Java Spring Boot, with an emphasis on scalable APIs, data modeling, and robust cloud infrastructure.You will collaborate across product and engineering, practice DevOps, and contribute to an...

Julius Baer in Madrid is seeking an experienced software engineer to design, develop, test, and maintain scalable applications using .NET Core and Angular. You will contribute to RESTful APIs, backend services, and DevOps practices while collaborating with cross‑functional teams to deliver high‑quality software solutions.The role requires strong OO...

Max IT Consulting – Max Corporate Group in Barcelona, Spain, is seeking a Senior AI-First Full-Stack Engineer to build an AI-powered healthcare workforce platform. You will own end-to-end product delivery across frontend, backend, and cloud, working with Type Script/React and languages like Java, Kotlin, Python or Go. You will deploy on AWS/GCP, design...

THEKER Robotics seeks a Full-stack AI Engineer to build internal software and AI tools. You will ship end-to-end applications, from the data model to the interface, and bring LLMs into them to reduce friction. You'll collaborate with engineering and operations teams, own deadlines, and deliver practical solutions in a fast-growing robotics company based in...