Job Summary: Invillia is seeking a professional to develop and evolve backend applications in Java, build secure and scalable REST APIs, and implement solutions using LLMs and AI agents. Key Highlights: 1. Backend application development with Java and Spring 2. Implementation of solutions using LLMs, AI agents, and RAG 3. Work on software architecture and performance optimization Come closer. Invillia has not only transformed how the world’s most revolutionary companies create and develop digital strategies, businesses, and products. It has also innovated the way technology-passionate people, from anywhere on the planet, can interact, grow, and become more connected than ever. For Invillia, it doesn’t matter where you are — whether in a large country or a small town — what matters is your will, your ideas, your potential. The size of your talent_ **Responsibilities and Duties** Develop and evolve backend applications in **Java and Spring** Create and maintain **secure and scalable REST APIs** Implement solutions using **LLMs, AI agents, and RAG** Work with **relational and NoSQL databases** Contribute to decisions regarding **architecture, quality, and observability** Collaborate actively, supporting the team’s technical growth **Requirements and Qualifications** Solid experience with **Java 17+, Spring Boot, and REST APIs** Knowledge of **Spring Data JPA, Hibernate, SQL, and PostgreSQL** Automated testing with **JUnit and Spring Test** Version control with **Git**, and use of **Maven or Gradle** Knowledge of **Python** (fundamentals, best practices, and API development) Experience with **AWS** (EC2, S3, IAM, RDS, DynamoDB, Lambda, ECS/EKS) Use of **Docker**, **CI/CD pipelines**, and observability practices Knowledge of **API security** (Spring Security, OAuth2, JWT) Experience with **LLMs**, consumption of AI APIs, prompt engineering, and **Spring AI** Implementation of **agent architectures**, including RAG and memory management Knowledge of **software architecture** (DDD, Clean/Hexagonal, event-driven) Performance optimization, query tuning, and caching (Redis) Monitoring with **CloudWatch, Prometheus, and Grafana** Infrastructure as code (**Terraform**) **Additional Information** The experience of working at Invillia is unique — and global. We have our own way of connecting talents and building innovations. We revolutionized the workplace \#Instation \+ we’re experts in developing complex solutions for \#GameChangers \+ we have a unique methodology \#EngagedbyDataPeopleAction \+ we invest in people \#InvilliaAcademy Some Invillia differentiators: \_innovate side\-by\-side with \#GameChangersGlobais \_distributed work culture \#inStation \_exclusive methodology \#GlobalGrowthFramework Immerse yourself here: https://invillia.com/ So, if you seek an opportunity to work from wherever you are, at a company dedicated to recreating the feeling of proximity, human connection, and being supported at any moment — even while fully distributed — this is the right place. Invillia is part of AI/R, the AI Revolution Company: a strategic connection of revolutionary components embedding artificial intelligence everywhere. AI/R comprises over 6\.000 technology professionals and has a global presence, with offices in Brazil, Europe, and the USA.