DESCRIPTION We are looking for a **Senior Backend Architect** with solid experience in **Java, Python, and microservices architectures** to join directly a leading company in **critical technologies and cyberdefense**. You will participate in the design and evolution of advanced platforms aimed at ensuring **scalability, interoperability, resilience, and security** of strategic systems. If you enjoy working in **highly demanding environments, with cutting-edge technologies and high-impact projects**, this role represents a true **professional leap**. ### **Main Responsibilities** * Design modular, scalable, and secure backend architectures (microservices). * Develop backend using **Java and Python**, following engineering best practices. * Define and implement **RESTful APIs**, system integrations, and distributed patterns. * Orchestrate solutions in **hybrid cloud and containerized environments (Docker, Kubernetes)**. * Drive **DevOps culture**: automation, testing, CI/CD, and integration. * Optimize **relational and NoSQL databases** (PostgreSQL, MongoDB, Redis, graphs). * Apply advanced **encryption, hardening, and security mechanisms in critical systems**. * Integrate **EDA architectures** and messaging systems (**Kafka, RabbitMQ**). * Ensure end-to-end **observability and traceability**. ### **Why This Position Is Different** You will work on **strategic projects with high technological and national impact**. You will join an expert **multidisciplinary team** with a high technical level. You will have access to **state-of-the-art technologies and cloud environments**. You will participate in design from early stages (not maintenance). **Real career progression** \+ training plan (over 6,000 courses). ### **What We Offer** * **Direct incorporation** into a leading technology company in Defense and Cybersecurity. * **Stable project with continuous innovation**, with international visibility. * Hybrid model: **60% remote work (Barcelona)**. * **Competitive compensation**, with flexible benefits options. * **Individualized career plan** \+ continuous training (Open University, Udemy). REQUIREMENTS ### **Minimum Requirements** * \+6 years of experience in designing and developing **complex software architectures**. * Proficiency in **Java, Python, microservices, and RESTful APIs**. * Experience with **Kubernetes, containers, DevOps / CI/CD**. * Knowledge of **databases, security, and interoperability standards**. * Familiarity with **distributed architectures, observability, and cloud**. ### **Desirable Qualifications** * Experience in **regulated sectors, defense, energy, aerospace, or critical banking**. * Knowledge of **ELK, Grafana, Prometheus**. * Experience with **Kafka, RabbitMQ, AWS/Azure/GCP**. * Technical certifications (*Cloud, Architecture, DevOps, Security*). * Fluent technical English.