Proven mastery and experience with JAVA 8/21, SQL and No SQL (Mongo), Redis, Docker, Cloud Serverless, MVC and Hexagonal Architecture, Observability, Messaging, and Camunda. Responsibilities: Develop and maintain backend services in Java. Create and evolve REST APIs with quality and standardization. Implement unit tests. Participate in code reviews and apply best practices. Monitor and improve application performance. Mandatory Requirements: Experience with Java (8, 11, or 17) and Spring Boot. Development of REST APIs. Unit tests (JUnit, Mockito). Knowledge in databases (SQL and/or NoSQL). Best practices (Clean Code and OOP). Ability to analyze and solve problems in a team. Knowledge in cloud (AWS, Azure, or GCP). Differentials: Experience with messaging (Kafka, RabbitMQ). Experience in the financial sector.