Job Summary: Indra Group is seeking Back End Java Engineers for strategic cyberdefense projects, developing and maintaining backend services, participating in REST API design, and contributing to continuous improvement. Key Highlights: 1. Strategic cyberdefense projects with real-world impact 2. Working with cutting-edge technologies in national and international security 3. A close-knit and collaborative environment with expert teams **Location:**Barcelona, CT, ES **Professional Domain:** Defense and Security **Required Experience:** Over 2 years of experience **Work Modality:** Hybrid At **Indra Group**, we protect what matters most. We are a leading company in developing advanced technological solutions that strengthen **national and international security**, working on strategic **cyberdefense**, intelligence, and critical systems projects within a highly innovative and technological environment. Through our **Cyberdefense Unit**, we participate in high-impact projects combining innovation, stability, and purpose, collaborating with expert teams and cutting-edge technologies in the security domain. Join our cyberdefense team! We aim to strengthen our team with **Back End Java Engineers** to join the **ECYSAP EYE project**, a strategic initiative where you can grow technically and deliver real value in critical solutions. What will you do? * Develop and maintain Java-based backend services. * Participate in the design, evolution, and enhancement of REST APIs. * Implement best practices in development and code quality. * Contribute to quality assurance through unit testing. * Collaborate on integration tasks with other services and systems. * Actively participate in agile work methodologies (Scrum / Kanban / SAFe). * Contribute ideas toward the product’s technical evolution and continuous improvement. What are we looking for in you? *Don’t worry if you don’t meet 100% of the profile. Feel free to apply and tell us what you can bring!* ✅ Minimum **3 years of experience as a Back End Developer**. ✅ Solid knowledge of **Java 8 or higher** and **Spring**. ✅ Experience with **relational databases**, especially **PostgreSQL**. ✅ Experience in **REST API development and integration**. ✅ Knowledge and hands-on practice in **unit testing** (TDD and/or BDD). ✅ Basic knowledge and practical experience using **Kafka**. ✅ Experience working in **agile environments** (Scrum, Kanban or SAFe). ✅ **English level B1–B2**. ✅ Degree in **Computer Engineering, Higher Vocational Training (CFGS)** or equivalent. What we offer you * **Stability and future ✨**: Long-term projects at a leading company in Defense and Security, with over 50\.000 professionals. * **Innovative and high-impact projects**: You’ll work on cyberdefense solutions delivering real impact at national and international levels. * **Hybrid work model**: 60% remote work annually, based in **Barcelona**. * **Close-knit and collaborative environment**: Expert teams, fluent communication, and a supportive culture. * **Personalized career plan**: Designed to support your professional and technical growth. * **Continuous training**: Access to Open University and Udemy for Business (over 6\.000 courses). * **Benefits and discounts**: Advantages for gyms, leisure, dining, and much more. * **Competitive compensation** and **flexible compensation plans**, tailored to your needs. *Our commitment is to foster workplaces where people are treated with respect and dignity, supporting employees’ professional development and ensuring equal opportunities in recruitment, training, and promotion—providing a workplace free from any discrimination based on gender, age, disability, sexual orientation, gender identity or expression, religion, ethnicity, marital status, or any other personal or social circumstance.* INDRA is a **Top Employer 2025**! Join a company certified as one of Spain’s best employers, thanks to our comprehensive HR management and the conditions we provide to our professionals.