Full Stack Engineer (Java / Kotlin React) | Up to 75k | Hybrid (Madrid)

About the job Location : Madrid (Hybrid) Seniority : Senior ️ Position : FULLSTACK ENGINEER We are looking for our client a leading international travel-tech company scaling our engineering hub in Madrid. We’re transforming the travel experience by building innovative, reliable, and scalable software used by millions of travelers worldwide. About the Role We are looking for a Senior Fullstack Engineer (Java / Kotlin React) who is highly motivated, collaborative, and passionate about building impactful projects. If you enjoy working across the stack—from frontend to backend and infrastructure—and want to influence architecture, mentor peers, and improve performance at scale, this role is for you. As a Fullstack Engineer, you will :

• Write high-quality, maintainable, and testable code in Java, Kotlin, TypeScript, Python , or other modern stacks.
• Build frontend web applications, backend services, APIs, and data flows .
• Participate in cross-functional Agile teams , from planning to production.
• Provide technical mentorship , conduct code reviews, and engage in architectural discussions.
• Continuously improve systems for scalability, performance, and resilience .
• Collaborate with stakeholders to shape product direction and make architecture decisions . Required Skills & Tech Stack We value curiosity, creativity, and a passion for building great products. Experience or interest in the following is a plus : Strong programming skills in modern languages (Java, Kotlin, Python, JavaScript, etc.) Experience with frontend frameworks like React, Vue, or Angular Understanding of backend technologies and RESTful APIs Knowledge of cloud platforms (AWS, GCP, Azure) Familiarity with SQL and NoSQL databases Solid understanding of computer science fundamentals (data structures, algorithms, system design) Passion for clean, maintainable code and modern practices ( CI / CD, TDD, DevOps ) Excellent communication and collaboration skills A drive to learn and improve , both yourself and the systems you build What We Offer
• Join one of the fastest-growing travel-tech organizations , changing how software products are built
• Be part of an amazing multicultural community of tech experts
• Highly competitive compensation package up to 55k-75k
• Medical insurance
• Hybrid work setup in Madrid
• Opportunities to build reliable, scalable systems that empower millions of travelers
• A team culture that encourages knowledge sharing, learning, celebrating wins, and aiming higher If you’re ready to take on an exciting challenge and grow with a disruptive travel-tech company, we want to hear from you!