Job Summary: We are looking for a Senior Java Developer to work in a challenging technical environment, focusing on support, evolution, and modernization of critical systems, with strong emphasis on distributed architectures and information security. Key Highlights: 1. Support and evolutionary maintenance of Java systems 2. Active participation in technical and architectural decisions 3. Collaboration with multidisciplinary teams and partner areas **We are looking for someone who dares to take the lead with us.** We seek a Senior Java Developer to work in a challenging technical environment, focused on support, evolution, and modernization of critical systems. The role involves developing new solutions as well as architectural evolution of legacy systems, with strong expertise in distributed architectures, system integration, and information security. **Responsibilities and Duties:** * Gather requirements, document, develop, test, and deploy Java-based solutions * Provide support and perform evolutionary maintenance of Java systems (8, 17, and 21) * Manage software releases end-to-end, ensuring quality and production stability * Actively participate in technical and architectural decisions * Propose server-side architectures for on-premises and AWS environments * Work with system integrations via REST APIs, Kafka, and RabbitMQ * Ensure security, performance, high availability, observability, and resilience requirements * Collaborate with multidisciplinary teams and partner areas * Contribute to initiatives for modernization and rewriting of legacy systems * Propose continuous improvements, innovations, and engineering best practices **Requirements and Qualifications:** * Strong experience with Java (8, 17, and 21) * Proficiency in Spring Framework, Spring Boot, JPA, Hibernate, and EJB * Experience with distributed and event-driven architectures * Solid knowledge of Apache Kafka and RabbitMQ * Experience with REST APIs (Swagger), SOAP, and integrations * Knowledge of Java security (TLS, mTLS, digital certificates, JSSE) * Experience with Docker and cloud-ready applications * Knowledge of AWS, especially ECS and EKS * Experience with Oracle, MongoDB, and/or Redis databases * Strong foundation in Design Patterns (GoF), SOLID principles, and Object-Oriented programming **Desirable:** * **Advanced English** * Experience with Redis Enterprise * Knowledge of AWS MSK, SNS, and SQS * Experience with NGINX * Experience with high-performance systems, auto-scaling, and self-healing capabilities **Additional Information:** * For your health, we offer **medical and dental assistance** with no co-payment for exams or consultations. * Want more wellbeing? We offer **Gympass** and **Zenklub** (with two free sessions per month) so you can care for your physical and mental health. * When hunger strikes, use our meal benefit **Caju** to shop at any supermarket or restaurant. * Love traveling? Here, we have **Férias & Co**, a benefit that helps make your dream vacation possible. * Have children? Count on our **childcare allowance**. * Growing family? We offer **MomCare**, a flexible monetary incentive after maternity leave for new Datunian mothers. * To personalize your workspace, count on our **home office allowance**. * Want to invest in your professional development? We have partnerships with several renowned educational institutions to offer you discounts of up to 70% on **undergraduate**, **postgraduate**, **MBA**, **language**, and many other courses! **To learn about all our benefits, visit the homepage of our careers page.**