Job Summary: Participate in the development and maintenance of applications, working with multiple integrations, and contribute to the evolution of legacy systems while collaborating with multidisciplinary teams. Key Highlights: 1. Participation in the development and maintenance of applications 2. Participation in the evolution of legacy systems 3. Collaboration with multidisciplinary teams Job Description Join South System and take off! We are seeking a **Senior Backend Java Developer** to board our spacecraft and together propel people and businesses through innovation. Location: Remote Responsibilities: * Participate in the development and maintenance of applications related to terminal activation and configuration. * Work in an environment with multiple applications and integrations. * Participate in the evolution of legacy systems, especially in the card network hub. * Perform manual deployments when necessary. * Collaborate with multidisciplinary teams and support continuous process improvement. Mandatory Requirements: * Experience in Java 8 and Spring Boot development; * Experience with microservices; * Experience with REST; * Knowledge of MongoDB; * Messaging systems: RabbitMQ and IBM MQ; * Knowledge of SOAP; * Applications using RMI. Benefits that make a difference: Udemy courses and certifications, selected by the Business Partner team with curation and guidance. Home office allowance to make your daily routine more comfortable. Financial education to support your economic well-being. Flash Card. Interested in this opportunity? Now we want to continue showing you why being part of South is so special: We are recognized by our team: we have been named twice one of the best places to work in Brazil (GPTW), and hold a 4.9 rating on Glassdoor and Indeed. We were awarded at the LinkedIn Talent Awards. We are committed to the future: we are carbon neutral, offsetting 100% of our carbon emissions. We operate with remote and hybrid work models, depending on the position and project. Our way of being: We value continuous growth and development. We have a culture rooted in respect, collaboration, and loyalty. We are diverse, inclusive, and believe in the power of plurality across our teams. We deliver technology solutions with innovation and real impact.